Question about Cars & Trucks
My isuzu pickup idles too high when in park. How can I adjust it down a bit?
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Posted on Jan 02, 2017
SOURCE: My 1989 GMC Sierra Pickup
it's your torque converter it let loose you will either have to get a new tranny or get your torque converter fixed it happened to my truck im still saving up before i can fix it. im a mechanic with a certified level two mechanics and starting my level three this spring.
Posted on Jan 21, 2009
if u have a high idle there are only 2 things that cause this, one is a vacuum leak at the intake manifold, the other is a defective idle speed control air bypass valve. The idle is computer controlled and not adjustable.
Posted on Apr 09, 2009
There are a couple of things that come to mind. One is make sure the EGR Valve and intake manifold are not carboned up. I normally have to clean them every 60 to 80,000 miles. It will actually close up with Carbon and restrict air flow and make the EGR valve malfunction.
Secondly, the diesel pump may just have a lot of wear and it is putting out too much fuel at idle. The only way this can be checked is by the dealer with a VW specific scan tool such as VAG-COM. With this tool, you can go in and look at the the pump timing and start injection quantity.
I have the start injection quantity many times but you have to have the software and login to get the readings. Most dealers will not do this but would rather sell you a pump if it is off.
Remove the hose from the intake where it connects to the EGR valve and look at the inside with a flashlight. See how much carbon is accumulated. This may not solve this problem but will help with starting and performance issues if corrected.
Good luck and hope this helps. To adjust the Idle, it needs to be programed in to the ECM so i am thinking that it's a Carbon issues that is restricting the air flow which the ECM is compensating to keep the engine from stalling.
Posted on May 22, 2009
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