V1 ECM

[ccannx]

Is there any procedure for diagnosing if your ECM is bad ? Also do the ECM's have to be calibrated to the VIN or VATS ?

I have a start but no run condition and I am starting to think somehow my ecm is bad. I cannot read it with HPTuners and their support is suggesting I have it re-flashed with a GM tech2 back to stock and then I would be able to communicate with it. Seems it would be more beneficial to buy another ECM then to pay someone to reflash it to a tune that will not work with the car as it sits.

 

[Ross]

Well, if you have already paid HP Tuners $100 to licence your ECM, you might want to buy your new ECM from someone who will flash it with your VIN, and thereby save re-licencing it with HPT. I think the key is also connected to the VIN number.

Update: these guys are cheaper...

 

[ccannx]

looks like ZZP will do it with the VIN for 109$ and a base tune but require the core back which makes sense. They specify by year so it may make a difference with the ECU : ZZP ecotec ECU

 

[Ross]

looks like ZZP will do it with the VIN for 109$ and a base tune but require the core back which makes sense. They specify by year so it may make a difference with the ECU : ZZP ecotec ECU

That's a great price. ZZP doesn't mention a VIN change on there website... they mention " We cannot change the VIN in this PCM ... For the seed key relearn, this is the procedure: " The one vendor also specified by year.

 

[ccannx]

That's a great price. ZZP doesn't mention a VIN change on there website... they mention " We cannot change the VIN in this PCM ... For the seed key relearn, this is the procedure: " The one vendor also specified by year.

Your right I didn’t catch that “VIN cannot be changed is LSJ ECU “ I assumed since they asked for the VIN in the order form they could, glad I didn’t order yet. I will call them Monday and talk to a rep about it.

 

[Lonny]

We have changed ECMs many times, the only thing you have to do is the 30 minute key re-learn each time you change ECMs.

 

[ccannx]

I got a new ECM programmed for my VIN. The next step is swapping it out but I'm concerned about damaging my engine running g it on a base tune. This motor has 60lb injectors and a 3.1 pulley so it has to be tuned but I have no way to pull the file. I'm not sure if the next thing I should do is find a similar setup and go from there or just drag the car to a tuner.

 

[Ross]

Is the old ECM working? If so, I could pull the tune with HP Tuners, or I can download a similiar tune from the HP Tuners repository.
Uploading to your new ECM will require transferring your old HPT licence, or purchasing a $100 new 2 credit licence.

 

[ccannx]

The old ECM works but the tune cannot be pulled from it or at least it seems that way. HPtuners said it was most likely Trifecta tuned I purchased 2 credits to get the licence but have not used them yet.

 

[Ross]

There is a couple tunes that are close to yours, at https://www.hptuners.com/my-account/tunerepository/?

2007 Chevrolet Cobalt Engine: 2.0 L4 - Manual Submitted By: lovemy12seccobalt

S256, Hahn I/M, 3" cat/exh, 60lb inj, 38mm ext gate.

MAF only, 7750rpm, zero adders, COT off, piston protection off, 91oct,

2006 Chevrolet Cobalt Engine: 2.0 L4 - Manual Submitted By: bumblebee

2.8in pulley,60lb inj,injen cai,dual pass, cobra he,header and down pipe,bkr8eix,78lb supertech springs,stage 2 cams,LDK piston and rods

 

[ccannx]

That first one looks like a turbo setup ? The second one has Cams Springs and different pistons but maybe that would work it would be rich.

 

[Ross]

Download the 2nd one, reduce redline (as you don't have the cam springs), hook up your wideband, then tune the MAF sensor, then the MAP sensor.
I have been able to do the tuning above... so I can help you if you want.