speedwagen

I'm getting ready to plumb up a different air intake, and would like some advice on resetting the ECM.

Thanks!

843de

Its one of those easy peasy things, just disconnect the negative battery cable and then have a cup of coffee(should be disconnected for about five minutes), then reattach it and you'll be good to go.

The computer will have to relearn you shift points and driving style so it might seem a bit "off" for a bit, but then it'll be back to normal with some driving around.

LawDog88

Tell that to my "Courtesy" Cobalt while Stiglitz was in the shop.. a slug I tell you.

jay loukakis

I went to the Chevy dealer to reprogram my ECM $92.00 there was 21 uogrades.

843de

Gotta get in the habit of giving rentals a "lobotomy" Kev, if it seems like it was built minus the engine, just pull the negative cable for a few minutes and then drive it like you stole it. The next guy will pee himself when it takes off from a light.

LawDog88

Mike..

Jay, what kind of HHR do you have? 2.2 or 2.4?

Greybeard999

" resetting the ECM."


Fuse box under the hood..... Pull fuse #41 for the ECM. About 15 minutes or however long it takes to wipe down and quick detail the engine compartment...... I mean, while you are there, may as well be doing something....

843de

That's the difference between resetting and reprogramming Jay, resetting it is like rebooting your computer, reprogramming is like adding a software upgrade. Dealers do tend to overcharge for reprogramming the ECM, nice dealers like mine do it free of charge.

Thanks Greybeard, completely spaced on fuse #41, call it old age.

LawDog88

Hey Mike, wanna help me get some upgrades to my programming here? I could use some FREE upgrades.

Greybeard999

Fuse #43 is the TCM if you have an auto..... Not sure how much the tranny "learns" but that would also be suggested for an auto......


By pulling those fuses you just clear those two modules...... radio and other stuff stays unaffected.