2000 Other Saturn Models 3rd cylinder misfire

Tiny
MATHIASMILLER
  • MEMBER
  • 2000 SATURN
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 260,000 MILES
After I start my car the rps go down to 800-900 range and the engine starts to shake a bit. When I stand behind my car the exhaust seems to come out in puffs. When driving the car it seems to have less power. When I got my check engine codes it said I have a 3rd cylinder misfire. I changed my coil pack, spark plugs, and wires. But the problem is still there. What could this be?
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Tuesday, November 24th, 2009 AT 3:44 PM

3 Replies

Tiny
SATURNTECH9
  • EXPERT
What model saturn is this?Sounds like u have covered all ur bases except the fuel injector or the compression in that cyclinder is low. To check the compression u would need a compression tester. Also u could have a issue with injector control signal from the pcm. Or the wires going from the pcm to the injector. Do u have a compression tester fuel pressure gauge or a blub test light?Let me know the answer to my questions so we can figure this out.
Louie
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Tuesday, November 24th, 2009 AT 4:02 PM
Tiny
MATHIASMILLER
  • MEMBER
It is a 2000 Saturn LS1
and I dont have anything to check the pressure in the cylinder, is there somewhere I can go to get it done? Im really just lost at what to do next.
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Tuesday, November 24th, 2009 AT 8:44 PM
Tiny
SATURNTECH9
  • EXPERT
I hate to say this but without being able to test the fuel pressure to see if the injector is putting the proper fuel in it or lack there of if the injector is getting the right signal from the pcm or the compression is high enough to get a good combustion then we would just be guessing what is wrong with it and wasting money if were wrong. So the only thing I can see in this case is to have someone look at it and atleast tell u whats wrong and if its something u can do then great u can fix it urself and save some money that way. Sorry I couldnt help u more there but let me know what u find out.
Louie
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Wednesday, November 25th, 2009 AT 11:44 AM

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