Have a 91 stealth twin turbo. Shop says ecu bad maybe.

Nice car- hard to tell from here, but it sounds like the shop is just guessin'- if you have the bucks, go ahead and let them try to fix it, call them on it and see if they are right- but if you value your money, find a different garage maybe one that deals with classic/high performance cars- are those the original turbos? the original cat?

Car only has 35000 orginal miles. Rear turbo was replaced. Cat has been removed. But ran great for 2 years after that. But 3000gt ecu shop is saying it's got security on it and my stealth ecu doesn't.

there is NO security on these ECUs theyre plug and play that is you have the right one for your car,, the new ECU have to match the number of the one your replacing theres a sticker on the top of them ill try n find you a pic of what im talking about,,

by the way is there any CEL's ? (check engine light) if so you need to post the codes if you don't have the codes then you need to get them pulled and figure out what they are

here see if this helps ya out any http://www.3si.org/forum/f1/ecu-numbers-642754/

Thsnks. They are exact match. No check engine car runs different with both

then you have either 2 bad ECUs or its not the ECU and you could still have codes even without a check engine light,, try checking codes and make sure there isn't any codes