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Next: engine surge at idle - 91 Sub
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External
Since: Sep 20, 2007
Posts: 13
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(Msg. 1) Posted: Fri Nov 02, 2007 6:45 pm
Post subject: Surging 350 at idle
Archived from groups: alt>trucks>chevy (more info?)
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Faithful 91 Sub surges at idle. About 192K on engine, no other problems
other than surging idle. Engine is rock steady above 900 rpm. Passed
rarified HOU TX emissions 30 days ago.
Codes indicated TPS and EGR valve so replaced tehm and plugs, plug wires,
cap and rotor, timing chain and gears, and coolant temperature sensor. Have
full power and better mpg now than when new (16+ mpg at 65 to 75) but it
looks like the surge problem is in the electronic fuel injection. Any ideas?
TIA! |
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External
Since: Nov 12, 2004
Posts: 792
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(Msg. 2) Posted: Fri Nov 02, 2007 8:38 pm
Post subject: Re: Surging 350 at idle [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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In article <GaednTsbHMzgK7banZ2dnUVZ_v6rnZ2d.TakeThisOut@comcast.com>,
"fireant" <fblackjack.TakeThisOut@comcast.net> wrote:
> Faithful 91 Sub surges at idle. About 192K on engine, no other problems
> other than surging idle. Engine is rock steady above 900 rpm. Passed
> rarified HOU TX emissions 30 days ago.
>
> Codes indicated TPS and EGR valve so replaced tehm and plugs, plug wires,
> cap and rotor, timing chain and gears, and coolant temperature sensor. Have
> full power and better mpg now than when new (16+ mpg at 65 to 75) but it
> looks like the surge problem is in the electronic fuel injection. Any ideas?
> TIA!
Check for vacuum leaks, especially between the throttle body and
intake manifold. |
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