Need Help at a loss..Thank you
Thread Starter
Newbie
Joined: Feb 2010
Posts: 12
Likes: 0
Model: Cherokee
Need Help at a loss..Thank you
1998 XJ 4.0
Cranks strong no start, no fuel to rail, no fuel pump, no fire, no pulse to injectors, new MOPAR CPS, New fuel pump, checked all fuses in and out, cap.. Still Nothing just cranks
was running fine
ALL help Greatly appreciated
Karen
Cranks strong no start, no fuel to rail, no fuel pump, no fire, no pulse to injectors, new MOPAR CPS, New fuel pump, checked all fuses in and out, cap.. Still Nothing just cranks
was running fine
ALL help Greatly appreciated
Karen
CF Veteran
Joined: Aug 2010
Posts: 8,357
Likes: 103
From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0
Fuel pump may be the fuel pump relay in the PDC and the no injectors/no ignition may be the automatic shut down (ASD) relay in the PDC. You can swap the radiator fan relay with the fuel pump relay to see if you get fuel to the rail. The fuel pump operates seperately from the ASD. Both systems have their own fuses. The fuel pump should pulse for 1 to 2 seconds when you turn the key to RUN, then run continuously when the engine starts.
Member
Joined: Nov 2010
Posts: 170
Likes: 0
From: Salt Lake City, Utah
Year: 90
Model: Cherokee
Please clarify, now with all the new parts installed, there is still no fuel at rail or spark to plugs?
Only thing I can think of would be a ECM. That's just a guess, as my 90 XJ is a whole diff animal from ur 98.
Are you getting any codes you can start with?
Only thing I can think of would be a ECM. That's just a guess, as my 90 XJ is a whole diff animal from ur 98.
Are you getting any codes you can start with?
Last edited by tgordon; Jun 19, 2012 at 03:54 PM.
CF Veteran
Joined: Aug 2010
Posts: 8,357
Likes: 103
From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0
Also, check fuse 11 in the Junction Block (passenger footwell fuse panel). It powers the ASD and FP Relay coils, and it powers the PCM and TCM(with the ignition switch in the Run position). Fuse 11 is a 20 Amp fuse in the 9th fuse position down on the forward (left) bank of fuses. The fuse position my be identified on the cover of the JB and/or in your owner's manual.
