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Z6 runs rough

Discussion in 'Civic and CRX - EF' started by prpprimo, Aug 25, 2008.

  1. prpprimo

    prpprimo Hondaholic

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    Alright, this is for the more experienced technicians as I have some under my belt. The engine starts but idles rough and revs slowly with very little power. Ensured timing. Plugs/wires/distributor replaced. Compression and fuel pressure checked out OK. (120-150 psi compression & about 35-40 psi fuel pressure) Further symptoms include fuel in the engine oil & oil/fuel out of the exhaust (fairly large amounts). Which to me are common symptoms of both a stuck open and stuck closed PCV valve, as well as worn valve guides.
    Facts are, if it were a faulty head gasket or rings, I would not be getting the mentioned compression from the cylinders.:huh: Not certain that simply replacing the pcv valve would correct this. What are your thoughts?
     
  2. BoostedHatch

    BoostedHatch get tha fuck out!

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    min is doing thr same exact thing and my oil smells like gas and car runs very rich all the time. i would like to know also not to be a thread jacker sorry.
     
  3. t3t4delsol

    t3t4delsol New Member

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    if you have fuel in your oil your fuel pressure regulator is bad, more then likely the inside diaphram is shot.
     
  4. BoostedHatch

    BoostedHatch get tha fuck out!

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  5. prpprimo

    prpprimo Hondaholic

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    Yes, p28 ECU . All vacuum lines good. If I am overlooking a vacuum leak some where, could it cause the engine to run this severely poor and blow incredible amount of smoke from the exhaust?. I did not have "WOT" during the compression check. Never heard of it or knew that would make a difference. I will try it.

    valve guides and seals?
     
  6. prpprimo

    prpprimo Hondaholic

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    WOT (wide open throttle) made very little to no difference. Same reading, except compression built up in less revolutions with the throttle open. What did make a big differnce is a wet compression test. Unfortunately this verifed faulty oil seal rings. :eek: Which explains fuel in the oil and rich/weak combustion.
     
  7. prpprimo

    prpprimo Hondaholic

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    Blanka..turned out to be RF interference...crazy ha//:yes:
     
  8. prpprimo

    prpprimo Hondaholic

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    To clarify this. Injector(s) were shorting out through RF interference from the distributor wiring, flooding the cylinders with fuel and causing the mentioned symptoms. Z6 now runs as advertised. (Daily Driver):D

    Blanka, is that what you were thinking?
     
  9. OoDTHoO

    OoDTHoO New Member

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    My Motor Was Blowing LOTS Of Smoke With A Ruff Idle. I Came To Find Out I Have A Cracked Block. If You Had A Bad Head Gasket, You Should Be Able To See Fluid Leaking Out Somewhere Around The Gasket When The Car Is Running. If You Have No Check Engine Codes Flashing ( always disconect the battery for a while before starting the car to look for codes ) Then I Would Take The Head Off And See If You Block Or Head Is Warped. You Will Use Something Strait Like A Ruler. Run The Ruler On The Bottom/Top Of The Head/Block, If You See Light Between The Head/Block And Ruler, Its Very Possible Its Warped.
     
  10. prpprimo

    prpprimo Hondaholic

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    OOD..I appreciate the post, please read the above posts. It was a flooding issue..the Z6 now zips it! No warpage issues here..;)
     
  11. OoDTHoO

    OoDTHoO New Member

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    Good Thing It Wasnt Your Block Or Head.
     
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