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Unread 05-12-2013, 10:07 AM   #1
magziz
Registered User
2000 XJ Cherokee 
 
Join Date: May 2013
Location: Tel Aviv, Israel
Posts: 1
Problems Appearing After Installing LPG

I bought this Jeep 2 years ago.
It was running dually on LPG and Petrol.
Right ater I bought the Jeep, I realized that the LPG doesn't fit:
Frontfire occured periodically.
The engine temprature got too high (when driving on tarmac).

Then, I decided to remove the LPG and have it run on petrol only.

Since then, multiple problems occured:
1) Coil number 2 didn't ignite a spark (the coil was replaced).
2) There has been a problem in the minus of the electrical harness (harness was fixed).
3) Then, I faced the following:
The engine seems to run OK, then when stopping some of the pistons stop working.
Then, when turning the engine off and immediately on it seems to run OK.
At the next stop some of the pistons don't run again.

Is this a known issue?
Could it be that the removal of the LPG caused this problem?
Is there a specific part that may be causing this problem?

I'm quite desparate because I already changed 2 engines and the problem remains.

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Unread 05-12-2013, 11:01 AM   #2
buildin1XJ
Web Wheeler
1999 XJ Cherokee 
 
Join Date: Oct 2011
Location: Knoxville, Tn.
Posts: 1,580
What do you mean the pistons quit working?
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Unread 05-15-2013, 10:52 PM   #3
sAe23
Registered User
1995 XJ Cherokee 
 
Join Date: Apr 2009
Location: Los Angeles / SFV, California
Posts: 2,469
And he changed TWO engines?!?
Something he ISN'T changing would seem to be a possibility (ECU, Intake components, et.c.)
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Unread 05-16-2013, 06:52 AM   #4
dave564
Registered User
2000 XJ Cherokee 
 
Join Date: Sep 2012
Location: Monroe, mi
Posts: 207
LOOK AT HIS LOCATION: He is in Israel. You need to translate a bit to understand.
What he means by pistons not working, is that it is developing a miss on one or more cylinders.

The minus side of the harness is a ground issue.

I don't see where removing the LPG would have done anything. It was probably an add on anyhow. I don't recall Chrysler even offering the Cherokee as dual fuel.

Sounds like a possible PCM issue (engine computer). I am thinking the bad ground might have damaged it. I am sure someone will chime in if I am not on the right track.
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