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Old 05-14-2012, 06:27 PM   #1
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Mrfootball420 is on a distinguished road
Join Date: May 2012
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Default 98 saturn sl2 just started running really rough

The car has been flawless and then this morning when I got to work It just started to idle really rough. About 2 weeks ago I changed the plugs, the wires and the coils. She ran even better then before and I even made 2 trips to arizona from california. Over 1000 miles with no problems. So I thought maybe it was the plug wires so i changed those today and it did nothing. I also removed and cleaned the Idle Air Control valve. that also didnt help. then I pulled and inspected the Engine Coolant Temperature Sensor and it didnt appear to be cracked. At this point i dont want to start replacing stuff and spending money i dont have on parts that wont fix my problem.

I have never worked on a saturn before so im not sure where to go from here. I am a honda guy pretty much. I was hoping you saturn guys might have a good feel for what my problem likely is, cause im stuck. Im thinking the after market coils might be faulty? I tested them and they do spark though.

Oh yeah the check engine light also started flashing too and the error codes are p0300( random multiple misfire) p0420 (cat efficiency below threshold) p0341 (camshaft position sensor range/ performance). The last one I called around and discovered the car doesnt even have a cps sensor. I felt like a real idiot, lol.

Could the cat convertor really be that clogged up making it run this bad? Im not sure? it just started out of nowhere so im thinking some type of sensor or module but idk?

please help


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