Rough Idle Job 1

[eric huskey 2]

My truck has a rough idle that I have never been able to get rid of completely! I have done things to improve it but it never eliminated it! I have replaced the plugs and wires (twice), new IAC, new intake gaskets, cleaned throttle body, and used snake oil. Anyone have any ideas on my problem?

 

[Dan Chatten]

I had a similar issue and it turned out to be the "cracked elbow". When I replaced the elbow and the idle fell right back into place.



I thought that I would toss that out.



Dan

 

[Todd Z]

Downs truck is a Job1 Gen 1 I believe, so the elbow is not on his truck...



I am leaning toward the diagnosis of intake manifold gaskets..



Todd Z

 

[eric huskey 2]

It runs fine going down the road. It just has a miss at idle.

 

[Dennis Shelley]

 

[Dennis Shelley]

The 2001 I have had a similiar problem. Replacement of the intake "O" rings (similiar to a gasket) on the upper and lower manifold cured the problem. Looks like a big job, but at one step at a time not a problem.

The computer will probably show a trouble code of "Lean mixture" on both banks.

 

[eric huskey 2]

I do not get an engine light. I have replaced the "O" rings gaskets you mention. Maybe I overlooked a hose.