car won't start

[toddomen]

I have a 97 grand prix with 3.8 with 132,000 mile good spark new fuel pump new fuel pressure regulator. all parts from auto zone help

[BNaylor]

Are you getting the 2 sec fuel pump prime at ignition to ON? How about fuel pressure per specs at the front fuel rail?

[toddomen]

it is 52psi down to 46 w/ key on and 50psi cranking the engine

[BNaylor]

Thats good and you sure there is spark? Did you get it scanned for any possible history odb-ii codes? And are the fuel injectors firing?

[toddomen]

I took the coil wires off and was getting good spark between the 2 posts. The codes that came back were random misfire, mass airflow & heat oxygen sensor #po135, po#107 and po#300

[BNaylor]

Disconnect the MAF sensor and see what it does.

[toddomen]

I did that and still will not start

[BNaylor]

Did you check all relevant fuses to make none are blown. Like to the PCM module and sensors. Check IGN1 - UH at the main engine compartment fuse box. 80 pin connectors at the PCM module?

[toddomen]

The fuses were all good and I did a noid lite test all good

[toddomen]

I was able to finally get it started and now I have 2 codes po300 and po502. Any suggestions?

[BNaylor]

The P0502 DTC is an issue with the Vehicle Speed Sensor (VSS). Located on the right side transaxle extension.

How old are your spark plugs and ignition wires?

[tblake]

Is the P0300 a history or current DTC?

[toddomen]

I pulled the plugs and they were soaked with gas. I cleaned them and reinstalled them and cleared the codes, no issues at this time. I am now thinking the whole problem may have been a bad fuel regulator dumping too much fuel.

[tblake]

It could have. Did you replace the O-rings on the new regulator? (if it didnt come with new ones).

[toddomen]

yes come with new ones thanks for the help