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PKRWUD · 01-26-2002, 11:46 PM

It could be several things, but I'm curious as to what your TPS is set to. MAF ECM's have a narrower range than SD ECM's. Where it was okay to have your TPS adjusted to 1.0 vdc with an SD ECM, that same adjustment can cause problems with a MAF ECM. Also, the MAF ECM's tend to have their TPS voltage increase slightly when the engine warms up, which could push it over the idle limit, and fool your ECM into thinking you're cruising rather than idling. Just to be safe, you should set your TPS no higher than .95 vdc with the engine at operating temp. I don't recall if the one you've got was originally for an automatic or not, but if it was, they also have been well known for having a slow-to-return-to-idle-speed problem when installed in a vehicle with a standard transmission.

Take care,
-Chris

01-26-2002, 11:46 PM	#2
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	It could be several things, but I'm curious as to what your TPS is set to. MAF ECM's have a narrower range than SD ECM's. Where it was okay to have your TPS adjusted to 1.0 vdc with an SD ECM, that same adjustment can cause problems with a MAF ECM. Also, the MAF ECM's tend to have their TPS voltage increase slightly when the engine warms up, which could push it over the idle limit, and fool your ECM into thinking you're cruising rather than idling. Just to be safe, you should set your TPS no higher than .95 vdc with the engine at operating temp. I don't recall if the one you've got was originally for an automatic or not, but if it was, they also have been well known for having a slow-to-return-to-idle-speed problem when installed in a vehicle with a standard transmission. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!