This is unfreakin believable and EXTREMELY FRUSTRATING! :confused: In a never ending quest for getting my car dialed in perfectly i once again have hit a major roadblock as of today, Saturday! This all started with i attempted to dyno tune with ls1 edit over existing mail order program i had with Ed Wright! To try to make a long story short, i had major problems when my computer programmer a ttempted to download his own custom program over my Ed Wright progamming. We had limited success with this and then things went sour, when we kept on readjusting my shift points and then everything went haywire, and the car then failed to shift properly and was winding up to 4grand before shifting under minimal throttle (and of course was slamming off rev limiter at WOT). This problem was cured when we realized that ED WRIGHT program was causing us mega headaches and so i had my chevy dealer get rid of ed wright entirely and flashed me back to stock. My local computer tuner then reloaded his program which he came up for me after dyno tuning session on a wide band dyno and everything was running excellent for one month until i decided to do more fine tuning with him today, in order to extract every last bit of power out of my set up on wide band dyno today.

Well after pulling decent numbers after tuning today, 376rwhp and 446rwtq on my A4:D, it looked like everything was great until i drove off and realized that the old problem returned concerning car not shifting when it should under lite throttle and of cousre slamming off rev limiter again at WOT. All we did was changed air fuel ratios and he also downloaded another program which was to lock up the converter in 3rd on dyno. When we were done he turned off the parameter which locked up converter but not shifting again unitl it reved to 3000 under light throttle.

I am really frustrated as my car is not taking the commands that LS1 edit is giving it. I have heard about some problems with LS1 edit and 98 vette but this is ridiculous! Also, my pcm has never taken the LS1 edit command to lean out my air fuel ratio in high rpms past 6000 and finally, the only thing which could lean out my air fuel from 12.2 to a perfect 13.4 across the whole rpm board was my MAF Translator (which accomplished perfect air fuel readings by going 8% lean with MAF T. With just LS1 editing, the pcm was not taking commands and never has been able to lean out air fuel on high rpm where my car tends to run rich, and without MAF T i would not be able to lean out air fuel over 6000rpm! WHY THE HELL ISN"T MY PCM TAKING THE COMMANDS FROM LS1 EDIT REGARDING SHIFT POINTS and air fuel in rpms in excess of 6K! This is totally BS! :mad

My tuner and i figure we only can now go back to dealer and reflash program to stock again and put in my personalized program as this fixed me last time. Do you think my PCM is frucked up or going bad. I did buy a brand new one as a backup, and do you think i should put this one in the car and put custom program into the brand new pcm b/c something very strange and bizare is going on with my current pcm not taking commands and not shifting where we have the pcm set to shift! :confused:

I guess back to the dealer to reflash to stock and leaning towards puting in brand new PCM. ANy suggestions? Sorry for the long post but have to get all the facts out! This SUCKS BIG TIME! Should be really interested trying to dial in properly new gears coming of 3.73s and yank prothruster 4000!

Thanks &

Nitrovette :seeya


[Modified by Nitrovette, 10:42 PM 6/22/2002]


[Modified by Nitrovette, 11:22 AM 6/23/2002]

 

Jim doesnt it suck when your car is not running right or running at all ;) , if I were you I would definately get another computer, it sounds like there is something wrong with it. Get another computer and at the very least you will know if its the computer or LS1 edit that is causeing your problems.

 

Jim try getting another PCM!!!!!I want to go for a rip in that thing with the ET's on it!!!!

 

I'm in the "you don't need another computer" camp. You've got email.


[Modified by ToplessTexan, 11:25 AM 6/23/2002]

 

I don't think it's your PCM, I think it's the programming, stick with one programmer!!

 

Jim,
That totally sucks!!!!!!
My cell got run over be me :D I am waiting for a new one to "light up."
I will try and call you later tonight or tomorrow. DO NOT hesitate calling me at ANY time. I am just getting back into town after a long leave (still in limbo though and will be here and there ) :D

I do not think you need that new pcm yet. If you are able please email your program (I will tell you how over the phone if you have any troubles ;) ) Maybe we should get together and have a crack at that thing :eek: :crazy:
If you had the pcm reflashed ( I thought you had, about 2-3 weeks ago) it should be taking the new commands. I would think if the stock program was corrupted also it would have given you troubles soon after the reflash.

If he has version 1.05 he might want to use that. Are those stock injectors? They should be the same as Z06 injectors, but you may want to try some 36lbs and back them in. Some Russ Collins balanced LUCAS injectors would help ...flutter.....

If everything worked until yesterday when Mr. X ;) adjusted things for the dyno, then I would tend to lean towards programming error.

Do you still have the MAFT hooked up on your car????????????
:cheers:

 

Jim,

I tend to agree with your assessment of this ls1 edit nightmare but it is rather bizarre that i am having this problem again after reflashing pcm back to stock 1 month ago (and the car ran very good for one month) and now these new headaches after some simple new dyno tuning regarding air fuel. My pcm is not taking the commands of the ls1 edit tuner after all was fine ever since reflashing back to stock.

yes, i still have the heavy duty stock injectors that come with the 98s and i do have my MAF T hooked up and that is the only think which allows me to dial in my air fuel perfectly on the rpms over 6K. The ls1 edit is not allowing to lean out my air fuel over 6k rpm and the MAF T has been my saving grace with this.

Talk to you soon,

Nitro

 

Notro,
I know jack poop about what your problem (the car's problem), however you have my sympathy. b take a deep breath, don't totally sress loose it over a car, life is way too freakin short. Take some comfort that you have the support of all of us if not on line then at least in thought...

 

:confused:

 

Jim, sent you an e-mail

 

It's just like Jim describes. After seven runs on the dyno where the tranny was staying locked in 3rd (as it should), the last few runs downshifted during testing and then his tranny reacted in the street as he describes.

I've never seen any A4 (LT1 or LS1) react like this before. The last time his tranny was shifting that way we attributed this to Ed's programming being residual int he PCM so when it was flashed back to stock, and then reloaded with the new tune, all went well. All tranny issues were gone.

That was what I expected to see on dyno day #2 but it didn't go that way.

It was my suggestion to get it flashed back to stock and have the best rogram copied over to the newly read flash and reloaded. I believe this will work. But I don't understand why we have to go through this gyration on his specific car.

D/M's corvette went through 24 iterations flawlessly and I am fully confident that any other PCM will react that same way. All others do. I don't think it's a software or user error as some suggest, just a buggy PCM.

Any comments?

 

TTT

Nitrovette

 

Hey Jim,

Sorry to hear about your problems...that definitely sucks!

I have a hard time believing it would be the PCM. The symptoms just don't sound right for that kind of failure (I'd expect to see either intermittent random problems or else one or more consistent problems regardless of programming). If the behavior changes when the programming changes, then I have to think it's either the programming or LS1 Edit itself. Have you tried contacting Carputing to see if they've heard of this kind of problem before? I know there has been a lot of talk of problems with LS1 Edit and 98s.

Hang in there, it'll be awesome when it's all straightened out!

Good luck,
Collin

 

Just for your information....I spoke with Wright personally about programming and told him I used LS1edit. He said, "his stuff was not compatable with LS1edit". If he programmed first the PCM may be lockin out some of the flash.

 

You need to reflash your computer with the stock program and then use LS1 edit.. To bad we aren't closer or I'd come down and help you. Do you have access to a Tech II?


Dennis

 

Guys, they installed a stock GM flash about a month ago.

 

You still have to reflash again,,, once its screwed up its pretty tough getting it back to ground zero by programing it yourself. Start with the stock programing and take it from there.

 

Dennis:

I do not believe i can get access to a TECH II and appreciate your thought about coming down to help.:D

Nitrovette :cheers:


[Modified by Nitrovette, 10:19 AM 6/25/2002]