03 L300 not starting

Asked by Aug 30, 2017 at 07:46 PM about the 2003 Saturn L-Series 4 Dr L300 Sedan

Question type: Maintenance & Repair

It's an automatic, somewhere around 160 to 180k
miles. Never had any major problems. Had the
timing belt replaced not long ago.

I had my mechanic do a few repairs. The most
extensive was the valve cover gaskets. I got it back
and all was fine for a few days. (4 I think). Then
one day while my brother in law was using it. He
had been driving it a day and a half, he went to
leave. Started the car, backed out of driveway,
realized he forgot to lock house door. Pulled back
in to driveway, cut car off. Locked the door, went
back to the car and went to start it and it won't

Computer showed a faulty crankshaft sensor.
Replaced crankshaft sensor. Nothing, still turning
over but not starting.

Had it towed to the shop. Computer now showed
cam sensors, replaced those and nada. Still won't

Checked timing belt and to see if it was still in time
(jumped a tooth). All good there. My mechanic
says to him it seems to not be in time.

Checked for compression, that's good. However, he
found two plugs (brand new from the previously
replacing valve cover gaskets) were just soaked in
gas. Replaced plugs dried up gas.

Replaced, front and rear ignition modules, maf
sensor. A brain box near air cleaner (not the engine
computer). Still not it.

My mechanic is about done with not having any
other ideas. Except for the computer, I can't
remember why he hasn't replaced it yet.

2 Answers


Any ideas?

Your Answer

Saturn L-Series Experts

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