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General Forums => The Mess Hall => Topic started by: sfcl on June 12, 2010, 08:38:45 AM

Title: high idle speed
Post by: sfcl on June 12, 2010, 08:38:45 AM

Hi all,
On my 1992 multipoint EFI, I have removed and cleaned the throttle body and the idle motor, replaced the TPS by a brand new one, replaced all the seals and gaskets. Since that the idle is very high (between 1500 and 1800 rpm). Otherwise the engine runs perfect. Any idea? Thanks!

Title: Re: high idle speed
Post by: sfcl on June 12, 2010, 08:48:36 AM

Solved! I've just had to disconnect the battery terminals and put the 2 wires in contact to empty the processor memory. All is ok now. Sorry.

Title: Re: high idle speed
Post by: sharpxmen on June 12, 2010, 10:12:02 AM

Quote from: sfcl on June 12, 2010, 08:48:36 AM

Solved! I've just had to disconnect the battery terminals and put the 2 wires in contact to empty the processor memory. All is ok now. Sorry.

hmm, weird, that shouldn't happen but might be b/c of the tps although should have recovered on it's own once you had the new one installed.

Title: Re: high idle speed
Post by: bootguy on June 18, 2010, 09:17:45 PM

Have been having the same type of issues, but mine was 2500 RPM at idle.  After resetting the computer it is doing around 1500 RPM.  I have to replace my gasket in the intake/exhaust manifold because it leaks like a sieve, could this be the problem?

97 YJ 2.5 auto

Title: Re: high idle speed
Post by: Jeffy on June 18, 2010, 11:31:35 PM

High idle is a good sign of an intake leak someplace.  TB and intake are you're suspects.