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DISCUSSION => Engine + Driveline => Topic started by: FL318is on November 19, 2006, 10:03:27 AM

Title: Rough Idle
Post by: FL318is on November 19, 2006, 10:03:27 AM

When the car in sitting at idle it appears to be running rough.  With driving there is no RPM interruption.  Could it be the ICV?

Title: Rough Idle
Post by: johna on November 19, 2006, 06:06:47 PM

Most common causes are the rubber hoses and junctions (check for cracks and deteroriated rubber) in the intake or the ICV (try cleaning it).

Title: Rough Idle
Post by: biljak on November 19, 2006, 10:07:45 PM

Remove Lehrlauf (IDLE REGULATING VALVE). clean it with nitro and mount it back. if it will be better, than that's the cause. it was on mine. replaced it and it works like a clock :)
Try hitting it gently (knocking on it) to see if the idle will change a bit.

Part number 7 on image.

Title: Thx
Post by: FL318is on November 20, 2006, 11:11:20 AM

I appreciate the help.  Going to work on it Thanksgiving Day.  In the meantime I can deal with.  Do you have to take off the intake manifold to work on the hoses?

Any thoughts on plug brand?

Title: Rough Idle
Post by: biljak on November 20, 2006, 07:56:49 PM

no, you just have to unplug the hoses and wiring, and have one screw do deal with ;)

Title: Thanks
Post by: FL318is on November 21, 2006, 11:34:38 AM

Quote from: biljak;14174

no, you just have to unplug the hoses and wiring, and have one screw do deal with ;)

I let you know how it turns out.