I need to reach person who helped me 3 months.

JDDINGO

MEMBER
1996 GMC JIMMY
4.3L
6 CYL
4WD
AUTOMATIC
12,000 MILES

I need to reach person who helped me 3 months ago. I want to make donation now. I have another question.

vin 1gkdt13w4t2552970. 3-4 weeks- when cold hard to start and keep running-
3-4 weeks-when hot, easy to start and runs well-
1-2 weeks- sputters or stalls when hot and at idle as traffic signal, easily restarted-
3 days- unable to start hot or cold. When coaxed with starter fluid, will start-no
throttle control - engine will rev up to 2500/3000, falls off to stall. Can coax for five
to ten seconds by bumpping gas pedal, then stalls. If placed in drive while running,
will strongly surge a couple of times then stalls. After several attempts and block
warm engine will start own its own but continues with symptoms above.
No controllable idle, revs 2500/3000, stalls out.
Fuel pressure 61lbs with ignition on. New fel pump/3 months ago. Jddingo

3 Replies

HMAC300

MECHANIC
48,601 POSTS

Scan for codes and clean throttle plate on both sides with choke cleaner then have a pro check your spider under your manifold as these give some of the problems you are experiencing. The poppet valves screw up in injector s so it may need replacement.

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Wednesday, December 18th, 2013 AT 3:18 PM

MAXIMILIAM

ADMIN
436 POSTS

Can a coolant sensor create this sort of problem. Will follow up on your directions.

Jddingo

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Thursday, December 19th, 2013 AT 6:46 AM

HMAC300

MECHANIC
48,601 POSTS

You could try replacing it but I really don't think it would. If at freezing 32F resistance should be 12,300 ohms and up to 21,000 if down to like 5degrees F so if out of range replace it. But wha ti forgot to add is check fuel presssure again I know you said i'ts 61psi which is good for this engine, but does it hold that pressure for 5 minutes? If not it may be a fuel pressure regulator which may be under the manifold. It could be the spider as well because the earlier units would not allow the vehicle to start that is one of the problems with it. One other thing pull yur dist cap off and see if your rotor moves one way or another. If it does then pull the dist to see if the teeth are torn up if it is you'll need another dist. A pro will need to time it otherwise you will get a code because cam and crank sensor will be out of sync with each other and you need a scanner to put it back in.

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Thursday, December 19th, 2013 AT 7:34 AM