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Chevy Blazer Starting and Stalling Problems

326 messages,  Last post on Nov 27, 2009 at 10:50 AM

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#270 of 326 2002 Blazer intermittant start/stall by lpz Apr 12, 2009 (5:54 pm)
2002 Blazer intermittantly will stall right after starting. I have to hold the accelerator for about 10 minutes until it idles normally (500 - 600 rpm) to go. Most times it starts and runs just fine. I never can tell when or where this stall problem will occur. It could be the first start of the day or it could happen after the 2nd, 3rd or 4th stop/start - I don't know when it will happen. All diagnostic codes of the computer come back normal and it doesn't happen while the service man has it.
#271 of 326 Fuel pump or injection system? by dself Apr 27, 2009 (5:21 am)
I have an 87 blazer with a 350. Wouldnt start yesterday, poured some fuel in the throttle body and it did and then died, is it the fuel pump in the tank or the injection system and is there a test to eliminate on or the other? Replies to this message: jlflemmons (Apr 27, 2009 4:58 pm)
#272 of 326 Re: Fuel pump or injection system? [dself] by jlflemmons Apr 27, 2009 (4:58 pm)
Replying to: dself (Apr 27, 2009 5:21 am) Turn the key to "on" without going to the start position. You should hear a buzzing sound from the fuel tank as the fuel pump primes up. If you don't, turn the key off, and kick the bottom of the fuel tank two or three times and try starting again. Don't laugh, this is a well established "emergency recovery" for a dying fuel pump. If you do hear the buzz as the pump primes, check your fuel filter, and check for fuel pressure at the throttle body.   I am betting on a dying fuel pump.
#274 of 326 Rough starts but runs fine by zcarp Apr 28, 2009 (7:08 am)
Have a 2001 4.3 chevy blazer. have replaced spark plugs, fuel filter, air filter, egr valve. engine runs fine gets satisfactory gas milage. My problem is the initial start. Engine rumbles upon on start-up. Like the whole engine shakes. Engine always starts and runs fine but the initial start is always rough. when you shut the engine off it does the same thing. Some times worse than other. Any suggestions why this is happening? More of an annoyance than anything.
#275 of 326 1990 chevy blazer need sum help!!!! by marasmom25 May 16, 2009 (9:48 am)
1990 full size blazer with a tbi 350 its stalling out only after it gets warm idles great then try to rev it up after its warm and it stalls out 1800 rpms even does so while driving but always restarts.it hasnt thrown any codes good coil cap, rotor and wires can anyone help??? Replies to this message: jlflemmons (May 16, 2009 2:28 pm)
#276 of 326 Re: 1990 chevy blazer need sum help!!!! [marasmom25] by jlflemmons May 16, 2009 (2:28 pm)
Replying to: marasmom25 (May 16, 2009 9:48 am) Fuel filter?
#277 of 326 1995 Chevy Blazer by jyoung4478 May 25, 2009 (9:49 am)
Hi, I've been reading the passed posts and found it very interesting, I've had my Blazer for over a year now, and want to tune it up. My little sissy truck ran fine up until I got the brite idea to drive from florida to virginia (some 1800 miles). Before I left I changed the oil, the battery, and the air filter. The plugs, rotor and cap had been replaced with in a the passed 6 month so i thought nothing of it. I left on a rainy morning, it rained most on the way up and back. I noticed about the South Caralina border and the Service engine soon light came on border the engine was running a little ruff, and the Catalytic converter sounded like it had hole in it, the brakes had no vaccum assist and were hard to push. the further north I went the worse it got it would stall at lights and idol fast and slow, but seemed fine on the highway. In virginia I changed the plugs cap rotor and PVC valve. No change, i raised the idol a little so it would run at stop lights. And headed back to Florida. Another damp trip, but the truck seemed to run better the further south I got. Any ideas of what may have caused this. It still seems tempermental but is running a little better. The truck is old with over 200,000 miles on it but up until now the only trouble i've had is a fuel pump and tires. Also i noticed alot of carbon (black powder around the mouth of the intake can this be cleaned out like a regular carb (spray gunk) and is there anything else I can changeout during a tune up? THanks Replies to this message: jlflemmons (May 25, 2009 7:44 pm)
#278 of 326 Re: 1995 Chevy Blazer [jyoung4478] by jlflemmons May 25, 2009 (7:44 pm)
Replying to: jyoung4478 (May 25, 2009 9:49 am) Okay, first off, not carb cleaner, but throttle body cleaner. Something different in the chemistry.   Second, check the vacuum line coming from the intake manifold over to the vacuum resevoir. Would be in the area around the brake booster.
#279 of 326 CRANKING PROBLEMS by msbrewster Jun 15, 2009 (3:11 pm)
I have a 2001 Jimmy GMC and some days my truck will start and some days it won't I have put it on a computer and it's not reading any problems. I have changed the rotor,distri.cap I have reset the computer,and they say nothing's wrong with my fuel pump it's giving the right reading could anyone help me with this problem and when this started it's hard to put it in gear please help me anybody

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