Reading PCM with Z06 Door Ajar :S Check Engine

[johnsZ06]

I know that with my Predator hand held tuner, one of the things they mention is to have all the doors closed and not to have any accessories on in the car while writing to the PCM. It can cause problems like you've stated.

[Bruce Melton]

After flashing in V1.8 I get "reduced engine power" which I can not clear. I find that if you disconnect pos battery terminal and short it to the neg terminal>> hook it back up and all is good again.
Is this the same problem?

[jfpilla]

After flashing in V1.8 I get "reduced engine power" which I can not clear. I find that if you disconnect pos battery terminal and short it to the neg terminal>> hook it back up and all is good again.
Is this the same problem?

Before you start the tuner, after turning on the key, count to 15. After it completes the flash count to 15 before turning off the key. Works for me.

[Bruce Melton]

After flashing in V1.8 I get "reduced engine power" which I can not clear. I find that if you disconnect pos battery terminal and short it to the neg terminal>> hook it back up and all is good again.
Is this the same problem?

Before you start the tuner, after turning on the key, count to 15. After it completes the flash count to 15 before turning off the key. Works for me.

I know I am good on the after part will try the before part.
Thanks,
Bruce
Update> it works much better but not entirely consistantly. Seems to like key off before closing Flashscan.

[Nick 02 Z06]

I had similar problems after reading the stock tune last night.

Door closed when reading the PCM, completes the reading the stock tune, message says remove key from ignition for 15 seconds on my laptop. I do so. The car then starts to say Reduced power, Low voltage in my DIC. When I check for codes on my DIC there are a bunch. I tried clearing the codes on the DIC, with V5, V6 and V7 yet they all just pop back up as soon as I start the car. When I shut it back off take the key out, close the door and lock it the car continues to flash, "Reduced power, Low voltage". Very strange. I adjust my stock program save it, license the pcm and flash with the new program and the problem goes away.............

Strange that all these problems would occure just from reading the PCM.

[dbaxter_ss]

Glad to see I wasn't the only one now.

Didn't think we had the doors open, but we just opened and closed them since after the read, the door ajar light was on.

Anyway, I was able to use v7 to clear all codes. Worked just fine for me.

Thank god, or my boss would have killed me. Wounding his baby would not have been good

[jfpilla]

[quote="Nick 02 Z06"]I had similar problems after reading the stock tune last night.

Door closed when reading the PCM, completes the reading the stock tune, message says remove key from ignition for 15 seconds on my laptop. quote]

Try not turning of the key for 15 seconds after you get this message. I don't think the PCM is finished yet. With C5's you get 6 chimes after the message pops up and turning off the key before the chimes are done causes problems.

[Nick 02 Z06]

Try not turning of the key for 15 seconds after you get this message. I don't think the PCM is finished yet. With C5's you get 6 chimes after the message pops up and turning off the key before the chimes are done causes problems.

Thanks, I'll try it!

[dbaxter_ss]

Ok, second time this has happened on the same car.

All doors closed ( learned from first time ), nothing running at all in the car.
Turned it on for 15 seconds and even confirmed with a watch ( owner was a bit worried after last time )

Pulled the PCM, and all appeared to be just fine.
Made the few changes with cags, a/f, rev limiter and spark.
Uploaded the new tune

ALL GAGES ON THE Z06 WERE DEAD
Everything.
The car started just fine, but nothing on the HUD or instrument panel worked. EFI was showing them all working, even weirder.

Fix:
1. put the original stock tune back on
still dead gages
2. receded all cables, opened and closed all doors, cleared all DTCs.
3. pulled the PCM again
4. uploaded the stock tune again
5. started the car, all was fine.

6. uploaded the original changed tune from above and everything was fine????

Whats with Z06s? Bad enough the owners are snobby, the pcms are too? jk

Seriously, this blew more then half the time we paid for at the dyno just trying to get this working again.

Good side was I got the z06 up to 425fwhp up from the 410 stock just with the 3 quick pulls we were able to do.