2001 Saturn SC2 1.9 dohc - Engine Troubleshooting


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2001 Saturn SC2 1.9 dohc

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Bud283
New User

Mar 12, 2011, 7:51 PM

Post #1 of 4 (4758 views)

2001 Saturn SC2 1.9 dohc	Sign In

Car came into shop not running, guy had it sitting 8+ months. Stopped driving it because it was 'running bad'. Car had issues so I put a new timing chain, plugs & wires, water pump, valve cover gasket. Then car would crank & run bad & shut off, giving code (cam shaft position sensor & map sensor code) ... checked compression came back good readings and then blew air back into cylinder & it was blewing back out two of the intake values on 3 & 4 pulled the head & had the valves re-done & found crack over the ring on cylinder/pistion #4, replaced pistions (all four) and car still won't run. It will crank & run for a minute & it's like it's misfiring & it will die. If you try to re-crank it it acts like it is flooded & won't crank. Car isn't giving any codes now.

zmame
Veteran / Moderator
zmame profile image

Mar 12, 2011, 8:09 PM

Post #2 of 4 (4749 views)

Re: 2001 Saturn SC2 1.9 dohc	Sign In

I would do leak down test.. was the timing off when you changed the chain??.. they are a interference engine I believe. did you check possibility of bad crank sensor too? when it won't fire check and see if there is spark.

Bud283
New User

Mar 12, 2011, 8:15 PM

Post #3 of 4 (4747 views)

Re: 2001 Saturn SC2 1.9 dohc	Sign In

Yes, the timing was off. Replaced the crank sensor too. Pulled the wire off the coil pack & it's getting spark there. Haven't re-done the leak down test again since we replaced the valves.

zmame
Veteran / Moderator
zmame profile image

Mar 12, 2011, 8:23 PM

Post #4 of 4 (4746 views)

Re: 2001 Saturn SC2 1.9 dohc	Sign In

Might be a damaged valve seat or crack possibly.. did you have the head penetrate dyed or pressure tested for cracks?..

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