jeep help

boxboy · Nov 10, 2008

I am assuming you are putting a test plug into a wire setting it on a grounded metal someplace and looking for spark?

blackman · Nov 10, 2008

yes. i am checking spark that way and nothing from the coil

Wildman1 · Nov 10, 2008

What relays doesn't the older FI system have? Could it be one of them in the distribution box?

I would get a wiring diagram and start tracing wires.

Cascade_Crawler · Nov 10, 2008

whats the condition of the wire harness from from the CPS? could it have been damged in the swap? If it was the signal wont make it from the CPS.

NAXJA.ORG is a cherokee site, but those guys know the 4.0 engines, might want to start looking there...

boxboy · Nov 10, 2008

do you have a scanner to look for trouble codes?

Cascade_Crawler · Nov 10, 2008

boxboy said:
do you have a scanner to look for trouble codes?

cant scan renix systems, you can check them by alternating the key and getting the light to flash...

zukkev · Nov 10, 2008

Cascade_Crawler said:
cant scan renix systems, you can check them by alternating the key and getting the light to flash...

I've got an 89, and can talk to ecm, get codes....

blackman · Nov 10, 2008

the wires are fine and i tryed a new CPS too...

boxboy · Nov 10, 2008

bad coil?

Avanteone · Nov 10, 2008

zukkev said:
I've got an 89, and can talk to ecm, get codes....

'89 doesn't set codes.

blackman · Nov 10, 2008

boxboy said:
bad coil?

i was kinda thinking that might be it but i mean it worked when i pulled the motor ha

boxboy · Nov 10, 2008

blackman said:
i was kinda thinking that might be it but i mean it worked when i pulled the motor ha

do you have a multimeter? you can get the spec's and test it?

blackman · Nov 10, 2008

yes well i checked it connection and i am getting power to the coil on the correct wire pins..

zukkev · Nov 10, 2008

Avanteone said:
'89 doesn't set codes.

No disrespect,but...
Why'd I get an O2 code out of mine then?

boxboy · Nov 10, 2008

blackman said:
yes well i checked it connection and i am getting power to the coil on the correct wire pins..

on the coil find the ground post and put a test light (disconnect the ground) on it. You should see the light flash when you turn the engine over.

blackman · Nov 10, 2008

ill try it tmrw thanks

budgetxj · Nov 11, 2008

just put that thing up on the shelf next to all the other cherokee **** and forget about it. haha, good luck man:flipoff:

blackman · Nov 11, 2008

budgetxj said:
just put that thing up on the shelf next to all the other cherokee **** and forget about it. haha, good luck man:flipoff:

ha ha ha ya next to all the parts i got from you to put on when i did the motor swap..... i mean it might keep the half dozen or so race sleps company that are never going to move again ha

Avanteone · Nov 11, 2008

zukkev said:
No disrespect,but...
Why'd I get an O2 code out of mine then?

'87-'90 XJ's /w renix engine controls do not store trouble codes. This explains it a little:

http://www.naxja.org/forum/showthread.php?t=40817&highlight=renix+trouble+code

xraidedj · Nov 11, 2008

did you try putting a little wiskey in the fuel tank and alittle in a glass for yourself? that usually works for me...than smoke about 5 cigarettes, and kick the tire.....thats my ritual.:beer:

....after I've tried everything else of course.:stirpot: