[pls help, tuning issue
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Teching In
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[pls help, tuning issue 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
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.
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From: A small town, MS
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.
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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
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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
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
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Teching In
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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?
to the best of my knowledge
Johnny
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From: A small town, MS
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.
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Teching In
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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...
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..