golddestiny357

i sold my 1998 trans am to my friend and has all basic bolt ons and has a 2004 zo6 cam on it.. it has already been tuned with ls1 edit.. but the idiot added a hypertech programer to it and the engine started to missfire and act up.. he completly removed the programer and know the engine idles better but the check engine lights come on and it reading that is the o2s.. can it be that the o2s are no good or the the fuel table or something is messed up and it needs to be retuned?? any help would be appriciated

DrkPhx

iTrader: (15)

What are the actual codes set? Does the car have rear 02's any more? It could be those, but it's just a guess without the code numbers. You can try and go back to the previous tuner to see if they still have a saved copy of the tune.

golddestiny357

the rear o2s were removed and deleted with the ls1 edit ...but the codes were from the front o2s.. i dont remember the codes.. ill post them up 2morrow

Hemi2Slo

The hypertech will screw everything up. Even if you remove it it'll just replace the current tune with a stock tune. To my knowledge it doesn't save the tune from the computer before overwriting it.

golddestiny357

if that happens, how come it dosent through codes like egr that is being remove, it has the 3.73 gears and the speedometer is marking correctly and the rear o2s are also being remove and there is no code for that aswell.. only front o2s.. im confused

Hemi2Slo

How long have you driven it since the change? Some code diagnostics don't run but every so often.

golddestiny357

i hav already run the car for 3 weeks since the change.. it a daily driver

SS SLP2

iTrader: (8)

I may missunderstand the use of hypertech programer, I used it inconjuction with a mail order for several years way back when and never had a problem just changed/add/removed several differant shift points/fuel change/gear change/.....
My understanding was if you removed the hypertech programer it removed only the things IT had changed ( reverted back to the tune which it had over writen no matter if THAT tune was OE or Custom)
just my .02 as I am not a pro tuner
Johnny

golddestiny357

when ur going to remove the hpp, u connect it and on the hpp screen it gives u the option to make changes or go back to stock tune.. so u select, the go back to stock tune option to remove it completly, right?

SS SLP2

iTrader: (8)

correct, it goes back to the tune which was on the car at the tune it was installed, it does not know if it was a OE tune or a custom tune

to the best of my knowledge
Johnny

Hemi2Slo

Oh ok. Perhaps I was the one that was mistaken. I was going off what a tuner guy once told me. If I does go back to the previous tune and not stock, you must have other problems. Sounds like your O2s are either bad or you have a blown fuse.

golddestiny357

ooh and another thing is dat when im draiving sometimesthe check engine light goes out and it goes back on after a while..and always throughs black smoke only when i start the car and the tail pipes are completly black..but yeah, im going to start by replacing the o2s since that is wat the codes are throwing.. wich brand of o2s u guys recomend? i hav long tube headers...

golddestiny357

this are the codes the car is throwing p0131, p0151, p0153...

moehorsepower

iTrader: (3)

I don't know of the different versions of the Hypertec, but one of my customers wanted to see the difference between the modified tune that was in the car vs the Hyper on the dyno, the hyper would not download the tune, said something like Error, tune has been modified or something to that nature so it obviously will only download a stock tune..

golddestiny357

well its a hypertech ptrogrammer 3 i believe.. and when loading the hypertech tune to the already tune pcm by a ls1 edit it didnt gave any errors messages, it just did it

moehorsepower

iTrader: (3)

I guess there is a possibility that it could of corrupted your modified tune..