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Thread: GAS in oil

Started 1 month, 3 weeks ago by COXJ
I , had put a new fuel pump in my 90 xj ,4.0L now I think im getting gas in the oil. due to the oil smelling like gas and the oil got so thined out that the motor sound s like sh--. Has anyone here ever had this problem? Thanks , Cecil
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Forum: General Tech Topics  General Tech Topics - forum profile
Total authors: 6 authors
Total thread posts: 11 posts
Thread activity: no new posts during last week
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Other posts in this thread:

MaxxTraxx replied 1 month, 3 weeks ago
you get everything hooked back up correctly? How many miles on the jeep?

COXJ replied 1 month, 3 weeks ago
I think so , miles Im not to sure this is a rebuiled , with a new head about mouth ago, due to it over heated and cracked.

Woodside replied 1 month, 3 weeks ago
Have not suffered that problem, but know that the injectors are prone to damage from overheating.

kingjason replied 1 month, 3 weeks ago
Bad fuel pump probably.

blackmud4x4 replied 1 month, 3 weeks ago

schneiderman replied 1 month, 3 weeks ago
check your compression, could be a jacked up or wrong sized piston ring, which would lead to far more severe problems, this could defenatly be the problem if it was a unprofessional rebuilder who was too cheap or dumb to do it right

Woodside replied 1 month, 3 weeks ago
Crimped or clogged return line?

kingjason replied 1 month, 3 weeks ago
OK first question. Was it doing this before you put the new fuel pump on. Also why did you change the fuel pump?

Woodside replied 1 month, 3 weeks ago
Quote: Originally Posted by kingjason .. I am not an expert but have seen many a fuel pump dump gas directly into the crankcase because of a bad diaphram(spelling). In a carburated Jeep with the mechanical pump mounted on the block, yes ... but his post suggests a stock '90 XJ 4.0l which has an in tank fuel pump ...

kingjason replied 1 month, 3 weeks ago
HAHAHA yeah no doubt my brain is fried this morning.

 

Top contributing authors

Name
Posts
Woodside
3
user's latest post:
GAS in oil
Published (2009-11-09 11:15:00)
Quote: Originally Posted by kingjason .. I am not an expert but have seen many a fuel pump dump gas directly into the crankcase because of a bad diaphram(spelling). In a carburated Jeep with the mechanical pump mounted on the block, yes ... but his post suggests a stock '90 XJ 4.0l which has an in tank fuel pump and a recirculating fuel circuit with a psi regulator at the end of the fuel rail which should keep a regulated psi to the...
kingjason
3
user's latest post:
GAS in oil
Published (2009-11-09 12:35:00)
HAHAHA yeah no doubt my brain is fried this morning.
COXJ
2
user's latest post:
GAS in oil
Published (2009-11-08 23:49:00)
I think so , miles Im not to sure this is a rebuiled , with a new head about mouth ago, due to it over heated and cracked.
schneiderman
1
user's latest post:
GAS in oil
Published (2009-11-09 02:23:00)
check your compression, could be a jacked up or wrong sized piston ring, which would lead to far more severe problems, this could defenatly be the problem if it was a unprofessional rebuilder who was too cheap or dumb to do it right
MaxxTraxx
1
user's latest post:
GAS in oil
Published (2009-11-08 23:33:00)
you get everything hooked back up correctly? How many miles on the jeep?
blackmud4x4
1
user's latest post:
GAS in oil
Published (2009-11-09 00:00:00)
bad fuel pressure regulator

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