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The discrepancy was being caused by using the PID called "Air Mass" as opposed to "Air Flow". Both are in grams/cyl, and I have no idea what the difference is, but the "Air Mass" PID is off by about...

I'm sure this is simply due to my inexperience, hoping y'all can :help2:...

Vehicle is a 2007 Cobalt running on 100% Methanol.

The setup we have here is a Dynocom Dyno, with our own internally...

No this was done with the VIN reprogramming feature in 7.5 scan tool. Sorry should've said "re-programmed" instead of re-flashed!

Was doing some experimenting (2007 HHR 2.2L E37 ECM) and did something I probably shouldn't have done...re-flashed the VIN (with a 2010 VIN). It didn't really have any effect, so went back to the...

Changing the injector flow rate to 3.51 g/S fixed these two problems.

Ok apparently I have forgotten how to read! The 2010 tune file does indeed show a higher injector flow rate (B4001 Injector Flow Base) of 5.074 g/S as opposed to 3.51 g/S for the 2007.

Guess it...

2007 HHR 2.2L running on a 2010 HHR FFV ECM (E37 with VVT disabled). Drove vehicle for several hundred highway miles over the weekend on both E85 and E10 and in both cases the DIC mileage reported...

Sorry for the late reply...been out of civilization range (Nebraska) for the weekend.

It happens pretty darn quick...within a minute probably it is very close and within the next minute, maybe...

Ok I did the crank relearn procedure this morning (some instructions would have REALLY helped here) and it starts and runs fine now. Still throwing some variable valve timing related codes...P0016 I...

Hi Ross,

Well no matter WHAT we did this silly thing just refused to start. Disabling the anti-theft system was a troubleshooting tool, to eliminate that "feature" as a cause for the no-start...

Ross and Taz, both the 2007 and 2010 HHR ECMs are E37s.

I spoke with Sam this evening and he got the engine started on the 2010 ECM by performing the 30 minute VATS-Learn procedure (I believe with...

Progress!

Sam sent his file to the folks at EFILive, they performed the VATS patch and sent the file back. That seems to work as the engine will now crank with the wiring modifications I did to...

I design high speed printed circuit boards and microwave antennas for a living...do not tell me it is magic, it is NO such thing. Granted RF is a different animal that doesn't tend to play by the...

Oh there is definitely a sufficient level of not understanding a lot of this! No question about that. My comment was in no way shape or form intended to convey arrogance, if anything I am an overly...

And just what determines if a ECM, cluster...etc etc is "right"? This is where research seems to return conflicting information...nobody seems to know.



Why we want to do it is irrelevant.
...

lol there is no wizardry here...this is not magic just hardware and software.

Ok so you all are saying that the anti-theft system does not disable cranking, only running (fuel, spark...etc)?
...

So what is the intention of the VATS patch then?

Bill

Thanks we will try that.

So we are trying to get a 2007 HHR to run on a 2010 ECM/TCM combo (yes we have a good reason for doing this)...and I have taken care of the wiring differences between the two, but we're not sure if...

Removing the pin 1 (low speed data) did indeed correct the instrument cluster problem. It brings up another rather interesting question though (to us anyway)...why did it fail ONLY on the E37...

Hi Ross,

I just got off the phone with Sam...he did get your email and will try your suggestion to disconnect pin 1 of the data link connector tomorrow.

Thanks for the prompt reply.

Bill

Hi, I'm Bill and am working with Sam on this FFV research with the Cobalt and HHR vehicles.

For starters I would like to point out that we are not hobbyists...this is a real project with real...