PCMforLess

[mountainbiker]

I recently installed a new core PCM from PCMforLess. I really like the way my vehicle operates with it installed. The installation was rather easy. However, the instructions say I need to have a CASE relearn done using the Tech II scan tool.

I am showing no "check engine" light; therefore, I am trying to determine if I still need to have this procedure done. Per the PCMforLess instructions, it sounds like I need to do it regardless. However, if I don't need it, I would like to avoid the time, effort, and cost.

[mountainbiker]

PCMforLess said

1. You are good to go to reset the oil light. Sometimes it gets reset when we
reflash them.

2 The rough idle is normal for the first 100 miles of operation. After
that it should clear up and go away. If you used a CORE exchange that you
still must get a CASE relearn done even if the light is not on.

[ChevyHighPerformance]

If they reprogrammed your core you almost always don't need a case relearn because your CKP sensor data is already stored.

The best thing I found is to start the vehicle when cold and just let it ldle to normal operating temps. You can repeat this after it cools with the AC on. This will also help the RPMs drop when you let off the gas or press in the clutch.

PCMforLess does a good job.

[mountainbiker]

PCMforLess has 3 choices: (1) core PCM exchange, (2) send in your PCM, (3) loaner PCM program.

I went with option (1) which means I got a new PCM module already programmed up. However, it does need a CASE relearn.

If you do option (2) or (3), you won't need a CASE relearn as they will read the calibration data from your existing PCM and apply it to the new PCM.

If I had to do it again, I would have gone with option (3) as it is so easy to install. If you can live without your H3 for a bit, option (2) is the very easiest and cheapest route as there is nothing to return back to PCMforLess.

[timgco]

So what did they do? Change shift points? rev limiter/ tire size?

[mountainbiker]

Originally Posted by timgco

So what did they do? Change shift points? rev limiter/ tire size?

www.pcmforless.com

For me, I just told them how I drive my H3, tire size, and what I was looking for. So far I have only about 200 miles with the new PCM, but it no longer feels sluggish out the gate, it feels zippier, and the speed limiter is gone. They claim you will see improved mpg, but my ride is so new I never recorded the pre-mod mpg.

And what's the impact on your H3 performance?