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1996 Saturn sc2 can idle but will not run on any load

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  • 1996 Saturn sc2 can idle but will not run on any load

    Compression is all good but after a little of idling it goes down. When the egr is taken off it runs fine (egr is brand new replaced old one hoping it was the problem) I suspect that water is getting into the egr valve but I’m not sure.
    Things that are not the issue:
    Egr valve
    Tps
    Carbon build up on throttle body (cleaned)

    Things it could be:
    Bad piston rings (car has always burned oil I ad a quart every other fill up on gas)

    Water getting into egr

    It could also be the head gasket or cracked head but it doesn’t show any signs of either.


    Any ideas?


    Sent from my iPhone using Tapatalk
    Last edited by 300k_Saturn; 06-24-2019, 01:40 PM.

  • #2
    Compression check + post in correct section - moved it
    Sixthsphere.com Owner
    2016 Honda Fit
    2002 Saturn SL1 - RHD
    2002 GMC Sierra 2500HD Duramax

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    • #3
      Just to clarify, water or coolant is getting in?

      If it runs better with the egr off and you have major low power complaints check for a clogged cat.
      87 Fiero: Long term project.
      00 sl2: cheap DD pls no mods.
      01 sc2: high comp build round 2.
      08 lmm: aux tank, custom alum tonneau, aux oil cooler, aux filters, plow
      18 Acadia: Family hauler.

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      • #4
        It sounds like there is carbon plugging up the egr pentle.
        Take the EGR valve off and give it a quick rev to 4krpm and then shut it off and re-install the EGR. This will help blow excess carbon out of the EGR track. If you burn a lot of oil the carbon will build up again but you should be okay for a few months.
        -6S Resident Mechanical Forensics member #001.
        1995 SC2 Turbo 3.6L DOHC, 6sp manual, Ford 8.8 rearend running on MS3x.
        1998 F-250 5.4L triton...stock.

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        • #5
          1996 Saturn sc2 can idle but will not run on any load

          So figured out what the problem was. It was the pre cat on the exhaust manifold (it was clogged to the point where exhaust could get through but wasn’t allowing the flow it needed). Is there any way around that without having to buy another exhaust manifold (they are too expensive)


          Sent from my iPhone using Tapatalk

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          • #6
            I am looking at the last one for mine

            https://www.ebay.com/p/OBX-Racing-Sp...69229073&rt=nc

            https://www.ebay.com/p/Exhaust-Manif...37169149&rt=nc

            https://www.ebay.com/p/Maximizer-Hig...71800850&rt=nc
            2002 Saturn SC1, Metallic Orange , L24 1.9 , 204,170 miles

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            • #7
              HOLY CRAP. OBX going for $400. That is insane. You used to be able to get them for $100.
              -6S Resident Mechanical Forensics member #001.
              1995 SC2 Turbo 3.6L DOHC, 6sp manual, Ford 8.8 rearend running on MS3x.
              1998 F-250 5.4L triton...stock.

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              • #8
                Yeah I know I saw that and I was like dang when did saturn parts get so expensive. I solved the issue I just gutted a hole as wide as the pipe in the cat on the exhaust manifold still has the other cat so should pass smog when I have to get it registered soon


                Sent from my iPhone using Tapatalk

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                • #9
                  96 with a pre-cat? That I haven't seen.
                  Ian---The Fat Ass

                  1995 SL2-High compression engine FOR SALE
                  2010 Chevy Cobalt SS- tuned with plenty of goodness
                  2002 SC2-New daily
                  2017 Kawasaki Ninja 650 KRT- got a stupid deal
                  2003 Ford Taurus SES- free daily beater

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                  • #10
                    Originally posted by saturnspeed_12 View Post
                    96 with a pre-cat? That I haven't seen.
                    They did that in California.
                    -6S Resident Mechanical Forensics member #001.
                    1995 SC2 Turbo 3.6L DOHC, 6sp manual, Ford 8.8 rearend running on MS3x.
                    1998 F-250 5.4L triton...stock.

                    Comment


                    • #11
                      Originally posted by S.Bretz View Post
                      They did that in California.

                      I wondered if that was the case. Can't believe that happened back then.

                      Well now that you found the initial issue, might want to look into if it is burning oil or running too rich.
                      Ian---The Fat Ass

                      1995 SL2-High compression engine FOR SALE
                      2010 Chevy Cobalt SS- tuned with plenty of goodness
                      2002 SC2-New daily
                      2017 Kawasaki Ninja 650 KRT- got a stupid deal
                      2003 Ford Taurus SES- free daily beater

                      Comment

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