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2001 Other Saturn Models Saturn Rough Running?

Tiny
MDAWG2009
  • MEMBER
  • 2001 SATURN
  • 4 CYL
  • FWD
  • MANUAL
  • 216,000 MILES
It is a Sl2 about 100k on the engine. Last night I was driving and I developed an engine miss. Today I changed the spark plugs- no help. I isolated the problem to mostly the #4 cylinder. I thought maybe the coil was bad, so I switched them around-no help. I checked the #4 plug wire-no help.I changed the ingnition module- no help. I switched the #3 and #4 injector leads- no help. I listened closer to try to find the problem, I came to the descision maybe the injector was getting hung up. I switched the 3 and 4 injectors and the miss is still in the 4th cylinder. The fuel rail does not seem to be clogged. I do not know where to go from here, I have done all I know to do, and need help. The car runs ok once in a while, then back to crap. There is no kind of pattern whatsoever. What else can I do?
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Monday, April 28th, 2008 AT 3:11 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the compression on that cylinder could be an exhaust valve leak.
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Monday, April 28th, 2008 AT 3:23 PM
Tiny
MDAWG2009
  • MEMBER
  • 2 POSTS
The compresion is about 155 across all four, I forgot to mention that.
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Monday, April 28th, 2008 AT 8:03 PM

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