Ok, so I'm having an issue, I'm not sure if it's with my tune, ecm, or hptuners software/hardware.
I bought a used ecm off of ebay from a 03 cavailer manual trans.
the car is an 04 sunfire with GMSC kit. Stock 3.34 pulley and stock gmsc kit injectors.
I can tune high rpm ve just fine, I have closed loop turned off and dfco turned off also.
The problem is trying to tune the idle ve.
I have a histogram for idle and no matter what the changes after I drive it for a while, it reverts the afr to 10-1. So, I can change the idle ve and it will be close to where it's suppose to be, then I drive it around the block and when I come to a stop the AFR will go rich (10-1). And will idle rich til it gets reflashed (and will repeat this process over and over)
Also, when driving the gauges all reset themselves, like you turn the car off then on, but the engine stays on. It also throws muliple codes for vcm missing, airbag deployed, all electrical codes not engine related. Does this happen to anyone else?
What AFR does it shoot for when Closed loop is on?
FU Tuning
Closed loop on it goes for the standard 14.7-1, But when I stop at a light or stop sign it goes really rich and the ecm tries to get it back to 14.7-1.
dont think i can help with the tuning part but did you change the vin of that pcm to your vin? might be causing some problems if not..
i would have tried the modifications you suggested on the fake 2.5 bar tune but my fuel pump went poof so i need to do that before i can try >.<
12.33 @ 111.67 mph [Oct 2009]
Dyno'd on 08/02/09 - Mustang Dyno:
327.6 WHP 333.6 WTQ [10.1 AFR]
The vin is still unchanged. I'm not sure if that makes a difference though.
you could always try changing it and see if it works. when i put the reflashed pcm in the car it went into theft mode so i did the relearn or whatever and it worked after
12.33 @ 111.67 mph [Oct 2009]
Dyno'd on 08/02/09 - Mustang Dyno:
327.6 WHP 333.6 WTQ [10.1 AFR]
Doesn't it cost 2 more credits for changing the vin in your VCM?
Also if you turn the vats off it should eliminate the security theft problem.
hmm dont know about the 2 credits thing
good point lol.
12.33 @ 111.67 mph [Oct 2009]
Dyno'd on 08/02/09 - Mustang Dyno:
327.6 WHP 333.6 WTQ [10.1 AFR]
I had the exact same issue.... rich at a stop light and quit...... i got mad and pulled up the very first scan i did, turned out my idle tables had changed for some reason... so i copied and pasted in the stock factory graphs for idle and all was good..... took a long time to find the issue, hope that helps ya man.
491whp, 393wtq
11.93@ 127mph
Raven Autosports (902)850-3330
Hmm, that would be nice if it were something easy like that, I got tomorrow off, so i'll try that out. Thanks for your input.
Have you tried an entire rewrite?.
I've done a write entire only once.
you are doing the fake 2.5 bar right? i was about to go outside and play around with mine. if i get it running and it idles fine ill let you know what i have it set at
12.33 @ 111.67 mph [Oct 2009]
Dyno'd on 08/02/09 - Mustang Dyno:
327.6 WHP 333.6 WTQ [10.1 AFR]
got it to start, time to go log to get the fuel tuned
12.33 @ 111.67 mph [Oct 2009]
Dyno'd on 08/02/09 - Mustang Dyno:
327.6 WHP 333.6 WTQ [10.1 AFR]
