after about 30 min of drivin the car will start to backfire
the following have been changed

opti, coil, wires, plugs
Its frustrating the hell out of me
i dont know what 2 do
please gimmie ur suggestion
thanks
oliver

 

Maybe the Opti harness needs changed out.

 

just got it scanned
while it was running messed up
according to the Map the vacum stays the same while @ idle and wot
the reading was 150
and fuel is just being dumped in
any suggestions

 

well, if fuel was being dumped in, then it shouldn't be backfiring. thats usually a result of a lean running condition. mine has slight backfire when it pop in the clutch when revs are above 4k, but it's nothing to worry about. I'm guessing yours has a pretty big backfire? well, i'm not sure that it would help, but try adjusting the TPS and set it up to run slightly leaner. u can use a camaro/firebird haynes manual to tell you what stock volts should be. all u need is a screw driver and a digital volt meter. try that and see what happens

 

Sounds like it's time to try a new MAP sensor. Either the sensor is trashed or one of the wires is open/shorted. You shaould have a 5 volt reference signal on one of the wires, and the others are signal and ground. I bet it's the sensor though.