Have 3 codes P0303- misfire 3rd cylinder.P0120- TPS, but I replaced it and I tested the harness that connects to TPS with a voltmeter and it read 5V, just like the haynes manual said. And the 3rd code is a pending P0303, which I don't know what that means because I replaced the spark plugs. And about 10 months ago I had a bad (nipple) on the top of my fuel pump, so I replaced the fuel pump. How do I check the fuel pump pressure? And Ive thought about the IAC, but because its so expensive Id like to narrow it down to that before I go and but it and "hope" it works. As of now, I have replaced the air intake hose, vacuum hoses, TPS, spark plugs, and I have tested the EGR, MAP, and TPS and they all tested perfect. I also pulled the ECT while the car was running and it got worse. Plz, anymore suggestions?
Thursday, October 16th, 2014 AT 12:12 PM