Dies once it gets warmed up....then no spark.

HaleYes

NAXJA Forum User

Location

Clay County, IL

• Apr 3, 2007

• #1

93 XJ AW4, 4.0

Coil pickup replaced
Fuel pump replaced
Fuel pump relay replaced.

Runs fine but once it gets warmed up, it dies and looses all spark.
Let it set(cool down) and it'll run fine until it gets warmed up again.

I'm thinking PCM now. :dunno:

Any ideas.



TIA fellas.

Hale

 

87manche

NAXJA Forum User

Location

Ohio

• Apr 3, 2007

• #2

did you do the CPS?
or is that what you mean by coil pickup? The one on the bellhousing or the dizzy?

easiest way to check if it's the PCM might be to disconnect the PCM's temperature sender, since it only happens warm.

 

RedHeep

NAXJA #1499

Location

Landenberg, PA

• Apr 3, 2007

• #3

Did you check the coil itself?

Definately sounds like a heat soak problem, usually you don't have issues with an ignition coil unless the plastic is cracked and you got it wet.

Might be worth swapping if the parts place doesn't want an arm and a leg.

 

P

Pudwak

NAXJA Forum User

Location

Central Ohio

• Apr 4, 2007

• #4

I have owned TWO mopars (Dakota and late 80's XJ) that had the same problem and it was the pickup in the dist. both times.:compwork:

 

R

Rev Den

NAXJA Forum User

Location

Plainfield, IL

• Apr 4, 2007

• #5

Just a thought...

Find the coil pack.

Remove the coil pack from the coil pack holder. The holder is what the primary wires connect to. There should be several little hex head screws that hold the pack to the holder.

Clean the contacts on the coil and the contacts on the holder where the coil and holder connect, you will see what I mean.

Rev

 

HaleYes

NAXJA Forum User

Location

Clay County, IL

• Apr 13, 2007

• #6

Update for those who search:

Problem was solved with a new CPS.(crank position sensor)

Hale

 

B

BskisXJ

NAXJA Forum User

Location

Baltimore, MD

• Apr 14, 2007

• #7

Had the same thing happen to me. After cleaning the connections to the CPS and the TPS all has been great.

 

87manche

NAXJA Forum User

Location

Ohio

• Apr 14, 2007

• #8

Haleyes said:

Update for those who search:

Problem was solved with a new CPS.(crank position sensor)

Hale

Click to expand...

yay!