It was running fine when I went to work, after work when I started it, it was running really ruff, like it's only running on 3 cyl. I shut it off right away, then it didn't want to start again. I finally got it to start by putting the gas to the floor, like it's flooded, it was still making some noise, but nowhere near as loud, kinda faintly. I drove it home, and as soon as I parked it idled way down and stalled out. then when I start it again later, same thing, I have to put the pedal down to get it to start, and it sounds like it's running on 3 cyl again, now every time I try to start it it sounds this way.

I ran the codes, and here's what I come up with:
-33 MAP Sensor
-34 Vacuum Sensor circuit. The engine must run for atleast 5 min.,below 800 rpm, before this code will set.
-42 Electronic Spark Timing (EST) bypass circuit grounded

So far I have:
-Replaced the MAP sensor
-Replaced the Dist. cap, Rotor and module

I'm going to check the compression, and vacuum lines today, anyone have any ideas or input on my problem?????


Jason



USACi =>146.9db
14.88 @ 90.73MPH =>GM Charger, Motor Mounts, Catback exhaust

What kind of noise is it making?

It almost sounds like you have a vacuum leak to me, would explain the faint/wandering idle anyway.