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97 jimmy with a 4.3 problems.

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Old Sep 25, 2008 | 06:25 PM
  #11  
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Default Re: 97 jimmy with a 4.3 problems.

Originally Posted by Jimmie
found anything on this?
I wish I had good news to report but I don't


Originally Posted by RandomTask
My guess? Collapsing fuel line. . . does it have an in tank pump? Has it sat for a long period of time?
I would think it would be a collapsing fuel line if it did it all of the time. But if you start it up it runs perfect for 10 min or so. And after 10 min if you go to pass someone it will just fall on its face. But if you do not give it more than 1/4 throttle when it is messing up then it is fine. Also fuel psi is right at 55psi

Originally Posted by HerNameIsSway
How many mile are on your motor? Sounds like you are having a similar problem to what I had to go through with my 96 Blazer. I had to replace my EGR valve because it wouldnt hold an idle, I had to pop in neutral and rev the engine above idle RPMs.

Try the EGR valve. If it doesnt fix it, it needed replacing anyway.
Gave that a shot. did not fix the problem

Originally Posted by 93hatch
hook it up to a scanner. check and see if the timing is retarding when it bogs down.
That is a good idea. We have not given that a shot yet

Originally Posted by Rosco The Iroc
How much gas is in the tank? Did you install a new pick up, in the right direction, and so it would stay on? Are the fuel RTN and vapor lines hooked up right and tight?
Just a few ideas.
No we did not give it a new pick up or anything when we replaced a new fuel pump. Also after we put a new fuel pump in it ran good for a month until it started doing this. Also it will do it with any amount of fuel in the tank.

Today we took the cat off just to see if it was clogged and it also did not fix it.Also replaced the coil and the coil driver.

Last edited by UrGrlGveMeDkBrn; Sep 26, 2008 at 06:48 AM.
Old Sep 25, 2008 | 07:30 PM
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Default Re: 97 jimmy with a 4.3 problems.

Check that catalytic convertor. Real common problem on these cars.
Old Sep 25, 2008 | 07:53 PM
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Default Re: 97 jimmy with a 4.3 problems.

id suspect the distributor. these are common problems with these.
Old Sep 26, 2008 | 06:50 AM
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Default Re: 97 jimmy with a 4.3 problems.

Originally Posted by Gustav
Check that catalytic convertor. Real common problem on these cars.
Originally Posted by jebsurf
Today we took the cat off just to see if it was clogged and it also did not fix it


Originally Posted by CHAHONDA
id suspect the distributor. these are common problems with these.
We also pulled that just to see if it cracked a tooth or something and looked great.
Old Sep 26, 2008 | 08:59 AM
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Default Re: 97 jimmy with a 4.3 problems.

sounds to me like the motor is getting up to temp. and it is retarding the timing.

also if you have a temp gun check the temp. befor, on , and after the cat('s). that will rule out the converter theory.

also try driving it with the the fuel gauge hooked up and see if the pressure drops when it happens.
Old Sep 26, 2008 | 09:48 AM
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Default Re: 97 jimmy with a 4.3 problems.

did you post this on blazinlow too? would be a good idea if you haven't.
Old Sep 26, 2008 | 09:57 AM
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Default Re: 97 jimmy with a 4.3 problems.

sounds like the spider injector is bad... very pain in the ass fix as well
Old Sep 26, 2008 | 09:59 AM
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Default Re: 97 jimmy with a 4.3 problems.

Originally Posted by TACKLEBERRY
sounds like the spider injector is bad... very pain in the ass fix as well

its nothing but removing the intake. whats so difficult?
Old Sep 26, 2008 | 10:37 AM
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Default Re: 97 jimmy with a 4.3 problems.

Originally Posted by 93hatch
its nothing but removing the intake. whats so difficult?
I had to do one and broke one of the arms on it.
Old Sep 26, 2008 | 11:48 AM
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Default Re: 97 jimmy with a 4.3 problems.

Originally Posted by Jimmie
did you post this on blazinlow too? would be a good idea if you haven't.

Yea I kind of hijacked a guys tread that was having the same problem.
His was a coil went bad.I went out and replaced it and did not fix it.

Originally Posted by TACKLEBERRY
sounds like the spider injector is bad... very pain in the ass fix as well
I was thinking the same thing. That was one of the first thing's we replaced.
$264



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