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domingo

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Posts posted by domingo

  1. I think the car had the flu.

    Today I used it and the engine failure wasn't there. The check engine light didn't turn on. It had all the power it normally has.

    How can this happen? Now it got me thinking it's better to do what Logray told me in this chat.

    To use the breakin oil for 200 miles and then replace.

    I also thought that when I replace the oil I could use a slik 50 lube to see how this works.

    If all this doesn't work then I'll take the engine down and open cylinder 5.

    Can anyone give me some feedback on this. Thanks!

  2. At last we did the leak down test. It hard to give a clear diagnostic. The cylinder that was giving the problems was #5 so we started with this one. The air came out of the oil filler tube & the intake valves. My confusion comes when we did the same test on another cylinder #3 to be precise. And it did the same thing.

    The compression number we got out of this cylinders on the tests we did a while back were 180psi on #5 and 220psi on #3.

    This left me with more questions than answers.

    Could it be the rings? Or a burned valve?

    What test can I do so we could narrow down the problem? And get my car on the road again!

    I miss my car!

    I appreciate all the info you can give me thanks.

  3. Yesterday we did the test on cylinder 5 adding a little bit of oil and doing the compression test.

    The psi value went up to 215 psi.

    But we did the same test like 4 times and the values went from 215 to 190.

    Could this be the piston rings?

    Tomorrow we are doing the leakdown test . But I think it's an air leak problem.

    Give me your feedback on this.

    Thanks!

  4. I have a C4S 03, and have taken it to the dealer several times for the last 2 years for service because the check engine light turns on and the car docent fail at all.

    They have changed, all the oxygen sensors, all the spark plugs, all the ignition coils, the ignition wires set. And still the light turns on.

    The codes it's giving are this PO300 Porsche Fault code 507 misfire detection and PO306 Porsche fault code 509 misfire cylinder 6, this last code changes from cylinder 6 to 5 sometimes.

    What can I do? The dealer docent have a clue of what to do next, I have told the to call Germany for assistance but I get no answer. :lightbulb:

    Check the coil packs and spark plugs on cylinders 5 and 6. Double check the electrical connectors too.

    Yes I have already checked the coil packs & spark plugs on cylinders 5 & 6 and they seem to be OK.

  5. I have a C4S 03, and have taken it to the dealer several times for the last 2 years for service because the check engine light turns on and the car docent fail at all.

    They have changed, all the oxygen sensors, all the spark plugs, all the ignition coils, the ignition wires set. And still the light turns on.

    The codes it's giving are this PO300 Porsche Fault code 507 misfire detection and PO306 Porsche fault code 509 misfire cylinder 6, this last code changes from cylinder 6 to 5 sometimes.

    What can I do? The dealer docent have a clue of what to do next, I have told the to call Germany for assistance but I get no answer. :lightbulb:

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