Hi Jeepfriends, I need some help please!
My 1995 Jeep XJ was beyond repair, the body was total after a anccident and rust, so I used the motor a 4.0 HO as donor voor my CJ7.
it's running great, but when it's warm it begins to stutter and dies, on both gasoline and LPG.
I've replaced the following parts:
- rotor and distributor
- cables
- sparkplugs
- crankshaft sensor
- fel pump
- ignition coil
- other computer
the fault codes are: 12-76-27-55

can anyone help me?

best regards!

 

Hi, the code 27 says there is a problem on the injector circuit. If you have a multi meter start testing the injectors, if you don't then get one , they are dirt cheap and really help test parts and diagnose. I would guess there is a dead injector staying open or something if the injectors test fine then check the wiring . But even if a injector tests fine it could be stuck open with dirt.
Cold running engine wants to be rich but when warm it's too much .