imp

'94 GT 5.0L HO 5-speed, bought recently. New O2 Sensors, brand new (off Motorsports 5.0 in my shop) T.B. with TPS and IAC. Deleted puny K&N filter inner fender and added a big K&N. Previous owner deleted smog pump, belt bypasses it, removed canister and it's valving, plugged vacuum lines. Have not yet explored vapor line from tank, it's not present underhood.

AFAIK, the above cannot account for the dismal 13-15 mpg in town, can it? My '93 Cobra, stock, easily did 20 in town, 25 highway. Both with 3.08s. I'm driving it pretty conservatively. Wondering if the PCM might have been reflashed. Is there any easy way to tell, short of installing factory program, or new PCM?

Suggestions, ideas appreciated. imp

TrimDrip

it is impossible to flash a 94 gt computer. It has to have a chip to alter the factory programming

imp

Thanks for that! I'm obviously not computer savvied to well. By chip, you mean an added aftermarket device? If so, where would it be located, how connected to PCM? imp

TrimDrip

Yes, it will be in the place of the factory seal over the j3 port.