LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Gas still in oil?

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Old Mar 14, 2006 | 07:08 PM
  #1  
ChrisUlrich's Avatar
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Gas still in oil?

Had injectors tested... no leaking.

So I put them back in, lowered the fuel pressure A LOT, but still have fuel in the oil? HOW?!!?!?!!
Old Mar 14, 2006 | 07:13 PM
  #2  
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Re: Gas still in oil?

Bad fuel pressure regulator. The diaphram is ruptured allowing fuel to pass into the intake through the vacum line. WHen you shut off the engine the excess fuel pressure runs into whatever valve is open and drains past the rings into the crank case.

Re'
Old Mar 14, 2006 | 07:43 PM
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Re: Gas still in oil?

Pull the vaccum line from the regulator that goes to the manifold, if theres gas in there youve found your culprit.
Old Mar 15, 2006 | 06:23 AM
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Re: Gas still in oil?

Originally Posted by Evil Eric
Pull the vaccum line from the regulator that goes to the manifold, if theres gas in there youve found your culprit.
it's clean... nothing
Old Mar 15, 2006 | 07:25 PM
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Re: Gas still in oil?

Put a manual vacuum to the FPR. See if you get fuel. If not the only other cause for crankcase dilution is dead cylinder(s).
Old Mar 15, 2006 | 09:47 PM
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Re: Gas still in oil?

What does a Dead Cylinder mean?

I have a dyno chart and the car put down 430rwhp 415rwtq on a pretty solid graph...

Could a Dead Cylinder still occur?
Old Mar 17, 2006 | 03:18 PM
  #7  
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Re: Gas still in oil?

No one?
Old Mar 18, 2006 | 09:57 AM
  #8  
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Re: Gas still in oil?

Originally Posted by ChrisUlrich
What does a Dead Cylinder mean?

I have a dyno chart and the car put down 430rwhp 415rwtq on a pretty solid graph...

Could a Dead Cylinder still occur?
No one at all?
Old Mar 18, 2006 | 12:17 PM
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Re: Gas still in oil?

What's the a/f ratio? Just curious.
Old Mar 18, 2006 | 12:35 PM
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Re: Gas still in oil?

Its probably running rich.
Old Mar 19, 2006 | 01:15 PM
  #11  
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Re: Gas still in oil?

Originally Posted by Honda Hunter
What's the a/f ratio? Just curious.
I don't have the exact specs... I am so stupid though. I can't believe I didn't get the chart from them when it was Dyno Tuned. Ugh...
Old Mar 19, 2006 | 01:35 PM
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Re: Gas still in oil?

There is more to the air/fuel ratio than a WOT dynotune. The gas is getting in the oil during idle and part throttle driving.
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