97 gtp no start!!

[97gtpcoupe]

Hi guys new here but I'm having problems with my GTP.
Ok here's the info on my car and problem I'm having.
97 GTP. Mods are as follows: intake, smaller pulley, throttle body spacer, and zzp tuned.
So recently my car had been having a rough idle so I decided to clean the throttle body(done it many times on my supercharged cobalt and helped alot). So I get it all clean up(it was extremely dirty), new gasket installed hook everything back up, go to start it and no start. Car cranks but won't start! Codes I'm getting are p0122- tps sensor bad- new sensor installed but no luck, im also getting a cylinder six misfire. Any suggestions as to what it could be? Thanks

[ntreftz]

loose connection to throttle pos sen?

[97gtpcoupe]

I have checked and it doesn't seem to be loose, I'll check over it again. Anything else it could be?

[BillBoost37]

Cyl 6 has to be old because if you aren't starting..you can't misfire.

The TPS is likely the cause. And since you tried a new sensor, it's likley the wiring going to it. Try testing the ground and voltage at the connector with key on. They sell new pigtails.

[ntreftz]

any backfiring noises or anything, - describe the sounds while turning over, you may need cables or charge up the battery

[BillBoost37]

any backfiring noises or anything, - describe the sounds while turning over, you may need cables or charge up the battery

Pssst.. you know Scottydoggs is likely right.

[97gtpcoupe]

Ok I'm going to check again. I might just buy a new pigtail. Slight "pop" noise from exhaust after cranking it.

[ntreftz]

right about what?

[dsmuts]

Pull the tb spacer out and insure you don't have a vacuum leak at the tb

[ntreftz]

any luck

[97gtpcoupe]

No luck. Noob question, but is there any tps re learn for these cars?? Thanks

[97gtpcoupe]

Anybody?? Thanks

[BillBoost37]

No there isn't.

Have you determined which is missing.. spark or fuel ?

[Scottydoggs]

Pssst.. you know Scottydoggs is likely right.

right about what?

Cyl 6 has to be old because if you aren't starting..you can't misfire.

The TPS is likely the cause. And since you tried a new sensor, it's likely the wiring going to it. Try testing the ground and voltage at the connector with key on. They sell new pigtails.

im always saying to check the pig tail wires.


any chance you sprayed the maf with what ever you cleaned the TB with? that can kill the maf fast. only maf cleaner should be used on the maf.

[97gtpcoupe]

Sorry for the delayed updates.
No luck yet! Now I've bought the new tps, new pigtail(small tear on it). I removed the MAF to clean it with MAF cleaner, but is there any chance a bad MAF could cause it not to start? Thanks. Again car turns over and since changing the tps I'm getting a loud backfire

[dsmuts]

Unplug the maf and try to start it.