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Oil smelling almost like gas

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  • #849654
    gabe collinsgabe collins
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      1990 Jeep Wrangler 2.5 tbi system. I checked the oil and it sort of smells like gas. The jeep has been running real rich lately and I have a thread trying to fix that but I’m investing in a old code reader for it. I suspect that the pcv system is clogged. Can the pcv cause this? Any ideas will help greatly!

    Viewing 6 replies - 16 through 21 (of 21 total)
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    • #850577
      gabe collinsgabe collins
      Participant

        i’ll connect the scan tool when i get it in the mail its still on the way and i cant wait till it gets here! could ignition timing cause this issue? rewason i asked is because weather effects the way it runs and i hooked a timing light up to it and something seemed off. on cylinder 1 itll be fine at idle but once in a while the light would blink and then you raise the rpms and at about 1500-2000 the light stops. and the same goes for cylinders 2 and 4. cylinder 3 seemed to be doing great, it was steady and no other things like the other cylinders. is this normal or am i on to something?

        #850601
        GregGreg
        Participant

          When you say the weather effects how it runs what kind of weather causes the differences?
          Is it rainy or damp weather or just cold?

          Do you know if the ignition system is 100% or are the components of questionable age and condition?

          #850622
          gabe collinsgabe collins
          Participant

            More so on a humid day it gets ugly. I’m not very sure on what component since its all pretty much new but I have had some faulty parts in the past. Any ideas on how to check the the whole ignition system?

            #850631
            BluesnutBluesnut
            Participant

              There are a number of things that can cause rich running. A clogged catalytic converter can even do it and which can perpetuate itself as time goes on.
              Rich running leads to clogging of the converter which leads to richer running which leads to more clogging which leads…..

              #850660
              gabe collinsgabe collins
              Participant

                I’d have to check for clogged catalytic converter and its condition. compression tested as expected. the scanner isnt supposed to be here till the 19th so ill keep poking around with a multi meter till i get some where. i’ll keep you all posted

                #850917
                gabe collinsgabe collins
                Participant

                  I hooked the vacuum gage up to see if there’s any plugged exhaust or something of that nature. At idle while its warm the gage reads 14-15 inches in murcery. I believe the norm is supposed to be 17-21. The gage says late ignition timing but could this also mean a possible leak? Or it’s a clogged catalytic converter

                Viewing 6 replies - 16 through 21 (of 21 total)
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