Originally Posted by JHM2K

Stopped by Steve's house last night to grab some parts, and the car had been off for 10-15 minutes.

Got in the car to leave, cranked it and it ran EXTREMELY rough, idle varying between 400-600 RPM... coughing, sputtering, nearly stalling. Even worse once you put it in gear.

I was able to limp the car up to the garage door. We immediately checked the obvious things... vacuum leaks, unplugged battery for ten minutes, etc. Same issue. It would start, run rough as hell (almost as if a cylinder wasn't firing).

We swapped the camshaft position sensor with a replacement unit. Interestingly enough, once we got everything buttoned back up, it wouldn't even fire. It would crank and crank and crank, but never once fired off.

So.......

We're stumped. Next test tonight is to reinstall the OEM CPS, and if it starts but idles rough then we know the replacement unit is junk. If it doesn't start at all with the OEM unit in place, we have bigger issues.

Another thought was the coil packs... but if one coil pack was bad, it wouldn't cause the whole engine not to start.

Engine is getting plenty of fuel, I have a Walbro unit and the intercooler pump is a new Johnson CM30 as well.

Any pointers? Any hints as to why the engine would run (roughly) prior to replacing Camshaft Position Sensor, then wouldn't run at all?

Cheers,