Recent content by jan_mast

  1. J

    LS Turn signal issue

    So i have an 08 Cobalt 2.2 L. The left turn signal has been acting weird. If i click the signal lever all the way to the left, the signal doesnt blink. If i hold the lever with my hand and not let it click, then the blinker works. I think that indicates that its the turn signal switch...
  2. J

    Cylinder 1 Misfire, please help

    Michael, I assume you did a dry compression test. I see that it failed. Did you do a wet compression test on that cylinder? Basically you squirt some oil down in the spark plug opening, recommend the test gauge and run that compression test. Basically when you have a loss of compression you...
  3. J

    Vacuum leak???

    So I took it to a mechanic and he confirmed that it is a vacuum leak. He says it's leaking at the air intake manifold towards the #1 cylinder. WTH!? I just replaced that intake manifold and it came with all new gaskets. Is there a set of aftermarket gaskets I could use? Or some type of...
  4. J

    Vacuum leak???

    Yup! After changing my shorts I found a forum post that explained. Then I buttoned her back up and she started with no codes. Later I started getting the multiple misfires code. I still have what seems like a damn vacuum leak though. I sprayed carb cleaner around the intake manifold and...
  5. J

    Vacuum leak???

    I do appreciate the suggestion but with these cars it won't line up. When we retimed it we took the crankshaft cover off and made sure that all the timing marks were right on. The first time I tried to do the timing without looking at the mark on the crankshaft and I got mad codes like...
  6. J

    Vacuum leak???

    So I have an 08 Cobalt with the 2.2 L engine. I had misfires in #1 cylinder and loss of compression. Pulled the head off and replaced the following components: head gasket, head bolts, intake manifold, valves (#1 cylinder) and valve springs. The valve job corrected the loss of compression in...
  7. J

    Help with Misfires please

    Hey bro I need your help again if possible. So I get the new manifold in. Put it in place and start tightening up the bolts and nuts. I snapped off one of the studs that holds the air intake manifold on. Any idea about replacing that stud? I shouldn't have to take the head off again right? I...
  8. J

    Help with Misfires please

    So I redid the compression test and it passed this time. So the vales/springs or head gasket solved the compression issue. Then I was looking around and I saw a hose dangling. The connection had snapped off of somewhere. After more inspection I discovered a gaping hole in the side of the air...
  9. J

    Help with Misfires please

    Yes with misfires in #1 cylinder
  10. J

    Help with Misfires please

    I did try disconnecting the battery for awhile both times, no joy. I will do the compression test, though I would think that if we did bend any valves wouldn't I have gotten misfires in some of the cylinders? Also reading up on rough idle and dying at lower RPM's a lot of people said they...
  11. J

    Help with Misfires please

    So I took the head off and changed the valves, springs, and head gasket. Buttoned everything back up. Got a p0016 error. The car would start but the cam shaft sensor and crankshaft sensor didn't agree. Seems like a timing issue. Took the valve cover back off. A mechanic buddy of mine came...
  12. J

    Help with Misfires please

    So I did the wet compression test on the #1 cylinder. Though it improved the compression to 130 psi, which is >70% of the highest cylinder @ 185 psi. However the manual states that no cylinder should be more than 21 psi lower than the highest cylinder. In this case it fails that criteria. How...
  13. J

    Help with Misfires please

    The service manual only called for a dry test, but since you mentioned it I will do a wet test before I pay for anymore parts. I guess the idea is that by adding the oil to that cylinder it would seal up like the piston rings should be doing. Therefore if the wet test improves compression then...
  14. J

    Help with Misfires please

    Nope. Still misfires in the #1 cylinder. I got the compression test set today and sure enough the compression in #1 cylinder was really low. It's was 85/185/175/175 psi. I suppose I will replace the head bolts, gasket, valves and springs. I also plan on having someone look at the valve...
  15. J

    Help with Misfires please

    So i swapped injectors on the fuel rail and yesterday it ran smoothly with no misfires. Today... Misfires again. I got the test gauge in the mail today so I guess I will run the compression test tomorrow unless anyone has any better ideas. Thanks!
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