97 Blazer Rough Idle



This is a general guide which will list symptoms for 944 starting and running problems and common causes of those problems. It had been sitting for two years or so, and the second time I got it to operating temperature, it was running great, sounded good. I Have Replaced Everything That Has To Do With The Engine. What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Table #1 to change: Final Idle Airflow Minimum vs. What complicates a rough idle/misfire condition is having the PCM not register any specific misfire codes. I have a 1996 Integra that's been shifting a little rough lately. i thought the head gasket but that was not it. unplug distributor power wire and have someone turn it over for ya. I ordered crankshaft sensor camshaft sensor i cleaned the mass air flow sensor myself. Main difference is by cutting down the Final Idle Airflow Minimum vs. It must, therefore, be cleaned at regular intervals. I let it idle, then it died, never to start again. Since it was obviously missing, I needed to find the misfiring cylinder. it also seems the longer i sit the worst it gets. Again, start the engine and compare how it is running at a stop to how it normally runs. Get Your Chevy Blazer Idle Air Control Valve from AutoZone. 79: Add to Cart. We have since expanded to include the C/K series GM Truck and Suburban as well as past and present GM models. Then repeat the test. But the values have always been around. I have a 97 4. Irregular idle speed. 3 L Vortec V-6 About 100,000 miles (I bought my Blazer with the current issues because the guy from whom I bought the truck said it had MINOR transmission problems. Report This My 85 Chevy Blazer was great for 20 years and it also let me. Did intake gasket fix your problem. 0L - 305 V8. 3 4bbl idled rough, my '88 S10 Blazer with the 4. the donor was 2004 s10 - no computer i can't test this engine in the car. A vacuum leak on a fuel injected engine will cause high idle. Now it runs very rough at idle and a pending code for the evap system showed on the reader. You may have to register before you can post: click the register link above to proceed. I have changed the idle air valve, the TPS, and the thermostat sensor without any results. It went away then star. The stepper motor drives a valve pintle which protrudes into a passage that bypasses the throttle plates. I drove this SUV for a few miles with no issues. '97 Blazer 4dr 4WD WRECKED: Needs BCM, drivers' side fender, the surging and rough idle sounds like a vacum leak check around lower intake, TB, hoses, a good rule. have done at least 20 cams on those engines. The EGR valve is a component of an automobile's exhaust circulation system that reduces pollution-causing emissions. Ever since then it surges really bad at idle, was backfiring through the tbi (running lean condition or timing), and would barely run. Per-forming a cylinder balance test can help you isolate the problem cylinder. Our 86 F250 4x4 with a 460 carbed idles at 500 RPMs. The manual spec says it should be under 655 g/s, IIRC. Fast forward to January 2018, it developed loss of power and a shake at idle. Beginning a couple months ago it began to have sluggish starting (ie. unplug distributor power wire and have someone turn it over for ya. If engine rpm is higher than expected, by 200 rpm or more, the ECU will set DTC P0507 - Idle Control System RPM Higher than Expected in memory. Bogs when accelerator is pressed down. Idles fine in park but rough in gear. Rick’s Free Auto Repair Advice Need Free Auto Repair Advice? Find wiring diagrams, firing order and repair advice here. 3 Vortec 212000 miles Drove about 500 miles this weekend (200 there, 100 running around and 200 back) and the car was running great until I finished the last leg of the interstate driving. Exhaust has a very strong smell to it. As soon as it starts running rough the check engine light comes on and more often this happen when it is wet or damp weather. It may well be that these events are the hesitation & stumble problems described in this article. what is the function of the egr valve? Can it be repaired or does it need to be replaced? a very rough idle and can blazer 4. Then repeat the test. Hi TCCA & Forum Members, My 2000 Duratek has ~81,000 on it. What the Home Mechanic Needs to Know About O2 Sensors - An Article from the OBDII Technical Library Today's computerized engine control systems rely on inputs from a variety of sensors to regulate engine performance, emissions and other important functions. The EGR valve is a component of an automobile's exhaust circulation system that reduces pollution-causing emissions. If you retard the timing - the idle drops. Novice mechanic needs help. 5TD 5-speed manual truck in 2006 I was hooked! the truck had your FSD installed and the exhaust done. P0507 CHEVROLET Tech Notes If there are no intake leaks, clean throttle body, adjust engine idle and erase engine code. Per-forming a cylinder balance test can help you isolate the problem cylinder. We have since expanded to include the C/K series GM Truck and Suburban as well as past and present GM models. My cheap scanner says. remove valve covers. I've also heard that the distributor/rotor could be done and that could cause it as well. 8l engine to a 4. If the weak cylinder now contributes, the poppet valve for that cylinder should be suspect. rough idle on 95 s10 blazer 4. This applies to a number of GM vehicles. You can generally reproduce this by staying in park & using the gas to idle to the RPM that causes the vibration. The idle of a car engine is kind of like a human heartbeat: You can tell what shape it's in just by listening. Price $97. Usually, this happens about 15 minutes into a highway trip. For Parts, 1997 Chevy Blazer, Salvaged title 4x4 with 134k miles. As soon as it starts running rough the check engine light comes on and more often this happen when it is wet or damp weather. Average repair cost is $590 at 155,150 miles. when i put it in park or nuetral it idle up but it still lopes. 79: Add to Cart. Cleaning out the carburetor to remove carbon deposits is probably a good place to start. Seems to be worse when the truck is warmed up? (Seems opposite of what I'd expect for a problem like this?) The truck has 125k miles. My cheap scanner says. But the values have always been around. i replaced the plugs and cap and rotor. driving down the road it does fine, never sputters or struggles, but once i stop at a light it starts the rough idle. Question im getting p0300 p0301 p0302 p0303 random misfires on 3 cylinders. 94 Chevy Truck surges at idle in gear, loss of power under accel? I just bought a 1994 K2500 w/ 5. I have a 1997 chevy 1500 siverado with a 5. CHEVROLET 1969 BLAZER 5. What the Home Mechanic Needs to Know About O2 Sensors - An Article from the OBDII Technical Library Today's computerized engine control systems rely on inputs from a variety of sensors to regulate engine performance, emissions and other important functions. 2001 Tahoe Fuel Tank Diagram. running like right now, idles rough and when I give it gas it chugs, - Answered by a verified Chevy Mechanic. Mechanics have checked electrical and can not find anything. I don't know exactly what the stock clutch fans pulls. Get Your Chevy Blazer Idle Air Control Valve from AutoZone. I replaced the sensor in front of the charcoal box but it still ran rough. Repair Information for P0171 Chevrolet code. 38 comments. Its that round canister looking thing on the front of the intake manifold. Changed both o2 sensors ( I had a check engine light) 2. What could cause my 89' Chevy s10 blazer to start every time but want to stall until up to temperature. It's just below that that it's rough. December 16 took truck to Brakes Plus for full tune-up - plug wires, NGK iridium plugs, fuel filter, pcv valve, 3 belts, valve cover gasket (they said leaking into spark plug boot causing code). 97,blazer starts and run's, but idles rough and when i give it gas it dies. The scan values are slightly lower at idle than before and don't correlate to the truck manual. Engine sounds rough when accelerating; When accelerating there's a ticking/clicking noise (similar to a card on the spokes of a bike; like what children do). com FREE DELIVERY possible on eligible purchases. 1998 Chevrolet Blazer Rough Idle. Chevy Blazer and GMC Jimmy Questions. com Car Forums! Chevrolet Blazer has no power and engine bogs down. DROP PITMAN ARM DROP PITMAN ARM 03-08 DODGE RAM 2500 3500 4-6" LIFT 4-WHEEL DRIVE. Exhaust has a very strong smell to it. to prevent any. Rough idle/ stalls. A rough engine idle or stalling is a common complaint, but in some cases can be difficult to resolve. 7 vortec and it runs choppy at idle and when taking off but pulls out of it at 1500rpms but when it shifts it boughs until 1500rpms again and at highway speed i cant run overdrive cause it back fires and boughs and does the same thing when going up hills until it shifts down. My car was just inspected and I had my O2 Sensor changed, and he didn't find anything much wrong that would cause the rough idle, he suggested a tuneup. have done at least 20 cams on those engines. Pay attention to low idle or stalling. Engine would s. Any assistance greatly appreciated. I was told by the seller that it needed the idle air control motor, I pulled it out today and cleaned it with carb cleaner and a gun cleaning brush, tightened a couple hoses and checked for vacuum leaks but. the donor was 2004 s10 - no computer i can't test this engine in the car. What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. 3 runs good not a skip only idles rough when stopped Replaced 1 cap 2. Chevy Blazer Forum (GMC Jimmy). What are the common causes of code P0507 ? Depending on year, make, and model, DTC P0507 may have number of causes. P0507 CHEVROLET Tech Notes If there are no intake leaks, clean throttle body, adjust engine idle and erase engine code. For whatever reason you have determined that you need to adjust your base idle on your GM TBI vehicle. It seems if the butterfly is closed and not open enough to begin with, the ecm will never find the correct idle. The manual spec says it should be under 655 g/s, IIRC. Engine Stalls, Misfire Code, & Cylinder Misfire The engine may be stalling because it isn't getting enough throttle opening. Chevy Blazer and GMC Jimmy Questions. Sticky EGR?? Try unplugging the EGR motor connector and see if it clears up. What should I do? I got it for free and this is the first problem I've had since I got it in 2009. I noted that my transfer case mounts were very squshy so I changed them out thinking that it would make a huge difference. 1997 Blazer Automobile pdf manual download. 7L) -- and some 01-03's ---- have a chronic malfunction due to deposit buildup on the poppet valve nozzles located at the tip of each injector. It's just one of those engines that vibrate at idle. Bogs when accelerator is pressed down. 4 v6 rough idle and loss of power. Hence, after knowing the ways to troubleshoot rough idle when warm problem, anyone. 5) Adjust the idle stop screw so the engine idle speed obtains 550rpm in drive (auto trans) or 650rpm in neutral (manual trans). Hi/Low Sealed Beam H4 9003 Plug 6054 H5054 Compatible with Chevy S10 Blazer Express. Acording to the scan, all other. has a backfire sometimes through the intake. 3L Excessive Emissions, Poor Idle Quality Posted to GM Driveability on 8/14/2010 20 Replies All was running great after previous repairs,, just started running rough,, I removed EGR and cleaned pintle area still rough,, I noticed fuel cell value at idle is 17, off idle drops to 2 then progressively goes up with. Engine would s. 3 runs good not a skip only idles rough when stopped Replaced 1 cap 2. A dirty idle air control (IAC) valve in the throttle body can cause stalling and rough idle. Since it was obviously missing, I needed to find the misfiring cylinder. The truck will crank but no start. Tags due this month As is because, Has a problem in the motor/Camshaft. 3 engine is known for: bad idle air control valves and throttle control switches. It's just one of those engines that vibrate at idle. Rough running, low power P0102 P0340: '97 Chevy S10 Chevy Blazer 4. Does it idle rough immediatley after a dead cold start, like in the morning? these trucks really carbon up the intake. Happens more when it is cold/wet and when tank is below 1/4 full. Q: I have a 2000 Blazer and it has a rough idling, shaking problems when it idles. The engine sounds like it it's tring to regain it's vacuum every time I s. Bogs when accelerator is pressed down. 97 Chevy 350 burning rich rough idle on start up Why? are the engine will idle rough. We sell wholesale to the public. By acting as a barrier and removing these contaminants, the fuel filter protects your fuel injectors, your engine. 97024 AUG 97 Recall MIL ON/Rough Idle on Start-Up. It's not that bad after a cold start, but it gets worse as the engine warms up. The exhaust-manifold doughnuts could be rotten and can cause pipe to rattle making the catilytic converter/s hit the underbody and make your car feel like it has a rough idle. Why does my 99 chevy blazer idle rough and theres a very strong gas smell coming from exhaust. Some older cars use a carburetor to process fuel, rather than a fuel injection system. 3 Vortec motor in it. The system is critical to help cars achieve government emissions standards. It now runs very rough. 97 S10 Rough Idle S-10 Car Forums. Normally it's around1 grand when it idles. When I start the truck cold I get a rough idle that eventually dies down and the engine stops. I replaced the sensor in front of the charcoal box but it still ran rough. 5 lb/m (pounds/minute) which is over 13000 grams/sec. I also Have a 360 air filter and housing on it too. The Chevy Blazer refers to several truck models: the Chevrolet K5 Blazer, the Chevrolet S-10 Blazer and the Chevrolet Tahoe. i'm wondering what the engine would act like with a bad EGR valve? it's not stuck. Though I find it weird it only does it in Park when your driving around there is no such problem. The rough idle only occures when the engine warms up about 3 min after starting. Buy OKAY MOTOR Idle Air Control Valve for Chevrolet Blazer Astro S-10 Express GMC Jimmy Savana SUV Pickup 4. Find great deals on eBay for 94 s10 blazer idle air control. I have changed the plus, wires, cap and rotor to no avail. In fact, if you've noticed a rough idle, stumbling initial acceleration or even stalling – all when the engine is fully warmed up – a dirty throttle body could be the culprit. when first started, it idles very hard up and down, up and down. rough idle on 95 s10 blazer 4. i replaced the plugs and cap and rotor. I have changed the idle air valve, the TPS, and the thermostat sensor without any results. After surgery the engine starts good, drives good but: the engine have rough idle - only a little. CHEVY PONTIAC ISUZU L4 V6 V8 85-97 See more Sonoma Blazer Jimmy 4. We've got a wide rang of top-quality Chevy K5 Blazer Idle Control Valve of all the best brands in the industry at an affordable rate. Use this position when you start or idle your engine. I have a 97 blazer. Chevrolet Blazer fuel injectors maximize fuel efficiency and help your vehicle to utilize fuel more effectively, thereby reducing waste and helping your. Sometimes the car will start and drive fine. 2L V8) and if I dont keep my foot on the gas the RPMs immediately drop to zero and the whole car dies. An EGR valve that fails to close at idle is another common cause of stalling. You may have to register before you can post: click the register link above to proceed. The 1995 Chevrolet Blazer has 15 problems reported for idles roughly, stalls when stopped. I have a 94' Chevy S10 with the 4. It also has a rough idle if that has. I have no engine light so not sure if any codes are in the computer. Lights flickering at idle (engine, replacing, Chevrolet, battery) Idle is a little rough but not real bad. Used 2017 Hyundai Tucson, from Dodge Chrysler Jeep City in Burlington, NJ, 08016-2249. 1994 GMC S-10 Blazer LS from North America - Comments 94 Blazer 4. 97,blazer starts and run's, but idles rough and when i give it gas it dies. Rough idle indicates either a maintenance problem or a failed part. 3 Vortec 212000 miles Drove about 500 miles this weekend (200 there, 100 running around and 200 back) and the car was running great until I finished the last leg of the interstate driving. My car's exhaust smells like rotten eggs. While there are a variety of reasons your Chevrolet Blazer has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil. When the engine is started and run after the reflash, it may run poorly because the uncalibrated IAC is allowing an improper amount of air into the. it runs fine when i first start it, but soon idles low/rough, but only in gear. If i remove the pcv valve from the valve cover and have the engine running at idle speed the idle works fine, but when i reinstall the pcv valve the rough idle comes back and black rich smoke comes out of tailpipe. why does my 92 s10 blazer have rough idle in gear & erratic service engine soon light. watch each rocker for a few cycles then move on. 3 running rough. 97 S10 Rough Idle S-10 Car Forums. When I bought my K2500 6. A dirty idle air control (IAC) valve in the throttle body can cause stalling and rough idle. Its that round canister looking thing on the front of the intake manifold. unplug distributor power wire and have someone turn it over for ya. Its a chevy what do you expect. As the fuel filter gets dirty, the fuel pump works much harder. engines idle at somewhere between 500-600 RPMs. Hi/Low Sealed Beam H4 9003 Plug 6054 H5054 Compatible with Chevy S10 Blazer Express. (There's no problem in warm weather. It's not like one cylinder is not working rather i say irratic. No real noticable difference was made! It seems to be a rough idle and I have added gallons of Seafoam but. rough idle after changing all plugs and ignition packs, no reading from the under dash scanner,188900 miles (97. Customer brought this in, complaint was sudden loss of power. • 97 Chevy Silverado, Brake Pulsation • 97 Chevy S-10, Directional Switch Location • 97 Chevy S10, Brake Drag Problems • 97 Chevy Cavalier, More Wet Misfire Problems • 97 Chevy Cavalier, Locked Out of Radio & CD Player • 97 Chevy Cavalier, Backend Rattle • 97 Chevy Astro, No Injector Pulse • 97 Chevrolet Venture, Dead Turn Signal. I replaced most of the vacuum lines (did the ones around the throttle body first), replaced the TPS (scored a new factory part for $25 so I figured why not), cleaned the MAF (let it dry overnight), and at one point even reinstalled the factory intake tube (actually that was the first thing I did to no avail). View and Download Chevrolet 1997 Blazer owner's manual online. In the course of trying to diagnose a hot weather rough idle / stalling problem ( which doesn't occur in winter weather ) on my 97 Mazda 323 I performed a cylinder power balance test eye balling the. Idle air control valve uses a polymer blended, isotropic neodymium/iron/boron magnet to provide accurate control of the pintle and airflow ensuring accurate operation Every idle air control valve is manufactured with epichlorohydrin material to withstand resistance of vehicle temperatures ranging from -40 deg. The stepper motor drives a valve pintle which protrudes into a passage that bypasses the throttle plates. The best course of action is to take your vehicle to an Omaha auto service professional, but here are a few things it could be…. I've heard that the EGR valve being stuck on this motor is a common problem and can cause the rough idle. It's been around in several different forms before, dating all the way back to the 1960s. So i fixed it today and now the car is running rough and water spits out the tailpipes (more than normal) Tell me i didnt blow my headgasketthere is no oil in the coolant resevoir that i can tell and no water on the dipstick. The manual spec says it should be under 655 g/s, IIRC. Surging idle can be caused by a number of different problems. I have a 1996 GMC K1500 5. Search our online throttle position sensor catalog and find the lowest priced discount auto parts on the web. After it warms up, as I am driving and approaching a stop, the car idles at 1100rpm. It went away then star. In August, I drove it up to my grandparents and we did Plugs, timing belt, head gasket, etc. I ordered crankshaft sensor camshaft sensor i cleaned the mass air flow sensor myself. ignition switch could be bad, a lot of things could be doing this, best bet would to take it in to a place like CarX who does free estimates and can tell you whats wrong and if its a job you think you can do your self then you can save money on labor. Buy Original Engine Management IAC34 Idle Air Control Valve: Idle Air Control Valves - Amazon. Rough idle indicates either a maintenance problem or a failed part. This product is made of high-quality materials to serve you for years to come. In fact, if you've noticed a rough idle, stumbling initial acceleration or even stalling – all when the engine is fully warmed up – a dirty throttle body could be the culprit. So-called certified mechanic charged me $550 to replace upper and lower intake gasket, oil change, coolant system flush , reset engine light. Rough idle indicates misfire. 3 4bbl idled rough, my '88 S10 Blazer with the 4. Per-forming a cylinder balance test can help you isolate the problem cylinder. 38 comments. running like right now, idles rough and when I give it gas it chugs, - Answered by a verified Chevy Mechanic I have a 99 blazer with a 4. There are several reasons why this happens – some major and some minor. 0L 305cid V8 Engine Camshaft. ) or by trouble code. I got a 2002 chevy blazer 4. 97 Chevy 350 burning rich rough idle on start up Why? are the engine will idle rough. i've done a TBI swap on my '86 350. If engine rpm is higher than expected, by 200 rpm or more, the ECU will set DTC P0507 - Idle Control System RPM Higher than Expected in memory. Learn more about Chevrolet Blazer at the Edmunds. in a rough idle and high HC dur-ing an idle emissions test. We sell wholesale to the public. 8L all of sudden is hard to start, needs much cranking, and has a rough low idle. Any assistance greatly appreciated. It must, therefore, be cleaned at regular intervals. I have changed the idle air valve, the TPS, and the thermostat sensor without any results. Read more Chevrolet reviews to learn about other models. The Fan Clutch allows the fan to operate at lower speeds and effectively detach at higher speeds when the vehicle is moving and air movement due to velocity aids to cool the engine. After I did the swap it ran pretty good, kinda rough idle, stalled sometimes when put into gear. 3 CSFI idled rough also. After surgery the engine starts good, drives good but: the engine have rough idle - only a little. I replaced most of the vacuum lines (did the ones around the throttle body first), replaced the TPS (scored a new factory part for $25 so I figured why not), cleaned the MAF (let it dry overnight), and at one point even reinstalled the factory intake tube (actually that was the first thing I did to no avail). CHEVY PONTIAC ISUZU L4 V6 V8 85-97 See more Sonoma Blazer Jimmy 4. i have checked the mass air flow for fuzz build up on it. If this is your first visit, be sure to check out the FAQ by clicking the link above. 1998 Chevrolet Blazer Rough Idle. I doubt you'll ever find an electric fan setup that will fit and pull more than the stock clutch fan running at cruise speed. Other times I can start it and after letting it idle for a minute or two it will just turn off with out touching the gas or putting it in gear. What is a IAC valve on a 97 s10 blazer? Why would a 1994 S10 Blazer have a rough idle? Could be in need of a tune up Could have a vacuum leak. Cylinder 6 Misfire Detected. At idle, this situation allows for a very rough idle and when the truck gets to operating temp, it allows the engine to shut off. You’ll find free auto repair advice here with no sales pitch to lure you into a pay-for-help site. Starts fine, idles rough and sometimes stalls when stopped or when cornering at low speed. What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Idle air control valve uses a polymer blended, isotropic neodymium/iron/boron magnet to provide accurate control of the pintle and airflow ensuring accurate operation Every idle air control valve is manufactured with epichlorohydrin material to withstand resistance of vehicle temperatures ranging from -40 deg. I have a similar problem horrible sulfur smell and severe sputtering when getting into overdrive. Hesitation and surging on Blazer 4. All manufacturer names, symbols, and descriptions, used in our images and text are used solely for identification purposes only. my 94 s10 blazer (4. Cleaning the IAC valve can help, if there are no other issues. 3L 1996 running rich hard starting runs rough after. This alone should correct the rough shifting. 97,blazer starts and run's, but idles rough and when i give it gas it dies. Engine won't idle smoothly, idles too slowly, or stalls. 97 Blazer P0144 O2 Sensor Circuit High Voltage was created by Blazerguy1983 I got a Check Engine light the other day stating, "P0144 O2 Sensor Circuit High Voltage Bank 1 Sensor 3". Search for car parts, truck parts and aftermarket auto parts now. (blown engine) The engine and tranny was replaced. rough idle after changing all plugs and ignition packs, no reading from the under dash scanner,188900 miles (97. chevy blazer for sale The PCM code read that it was the cr. CHEVROLET 1989 BLAZER 5. Changed both o2 sensors ( I had a check engine light) 2. Ugh! Why do my car windows keep fogging up?! We've all been there. 3 L Vortec V-6 About 100,000 miles (I bought my Blazer with the current issues because the guy from whom I bought the truck said it had MINOR transmission problems. By acting as a barrier and removing these contaminants, the fuel filter protects your fuel injectors, your engine. there are no codes to speak of. watch each rocker for a few cycles then move on. will start it and it will run again but when the car warms up shuts off on its own after rough idle , could this be a timing. will start it and it will run again but when the car warms up shuts off on its own after rough idle , could this be a timing. View all 55 consumer vehicle reviews for the Used 2003 Chevrolet Blazer on Edmunds, or submit your own review of the 2003 Blazer. 5 Diesel or GM 6. 2007 chevy cobalt knocking sound. com FREE DELIVERY possible on eligible purchases. Question: My car's exhaus smells like rotten eggs when I start it up in the morning. running like right now, idles rough and when I give it gas it chugs, - Answered by a verified Chevy Mechanic. Now that there's a new alternator, it doesn't have to run as high. Also a dirt EGR valve could cause that condition also. i'm wondering if there is some blow by, or some sort of vacuum loss thru the EGR valve. Mounts seem ok visually. Huge Selection of Chevy 16 305 400, always low prices! Shop for Chevy 16 305 400 plus save on shipping on most orders. This can cause any of, or combination of, misfires, rough idle, engine light to come on, and/or difficult starting. Its a chevy what do you expect. I Have A Blazer That Runs Roughly, I Dont Know What The Problem Is. A rough engine idle or stalling is a common complaint, but in some cases can be difficult to resolve. Search for car parts, truck parts and aftermarket auto parts now. 3 had a funky poppet spider injector setup that I've hear horror stories about, but I would think low fuel pressure it would have gotten progressively crappy the schrader is up high and easy to get to. 3L V6 engine, and it very suddenly developed this loping, stuttering idle problem. In most cases this is only done if you have modified the internals of your engine or you have swapped a larger throttle body onto your vehicle. 1996 blazer V6 4. The truck actually ran really good. 7liter 350 engine, i replaced the motor,the other motor had 225,000plus miles. 1997 Chevrolet Blazer LS 4. Here's what you can do if yours is idling rough. Two things can cause a lean condition: 1) For a float.