bassxj

ok so i bought a 93 xj for 500$ and it is not getting any spark replaced cap wires, CPS, ignition coil. not getting pulsing to the ignition coil. i went to testing wires on the CPS,TPS,cam sensor and MAP thier 5v suply is reading 6.8v-8v and on the cam and the CPS are getting 15.5V i tested several wires for continuity from the ECU to the senor they check out ok.

please someone give me some insight on this issue i test the cps and im getting infinite resistance or (1) on my multi meter.

bassxj

PLEASE HELP

toasterknight

There is 0 chance you are getting 15v anywhere in the jeep. You need to check your meter and test it again.

bassxj

I have multiple times and used a brand new meter reads the battery fine. When I first turn ignition on the voltage goes up to 18v then goes down and stays at 15.5

mikesignal

sounds like the voltage regulator is going...voltage is regulated by the computer in your xj

bassxj

ok so i bought a 93 cherokee 4.0 in a no spark condition its been pretty hacked up the NSS has been bypassed and you can start it with no key so far i have replaced
wires cap CPS(tests good), ignition coil.

i tested the oragew wire on the cps cam sensor tps and map and they are getting 15.5-18v which is rediculous considering the alternator is not running
can this be a shorted wire or is this a definite voltage regulator problem and should replace the ECU?

battery voltage good and looks like it has a new alternator fuel pumps good

any advice is greatly appreciated

89Laredo

Merged threads.
Again...
Please post in your original threads instead of starting new ones.

All I have to say about your problem is you really need to check your multimeter.

bassxj

It's a brand new meter could the being able to crank it with no key have to do with not sending power to coil?

89Laredo

And this is with the key on, engine off?

No way youre getting 15v on any of the sensor wires UNLESS you possibly have a dual battery setup that isnt wired up correctly? What is the battery voltage?

bassxj

No dual battery's battery voltage is 12.5 I tested several battery's with the multi meter to check. And I can run the engine over with the key not even in the barrel the jeeps been hack jobbed and NSS bypassed

bassxj

Ok so pulled some codes

Got 11,12,52,53,54,55 then I put another ecu in and I was getting 12,54,55 and I checked voltage and was getting the correct 5v supply on sensors and 8 volts on the other side... Looked at my camshaft sensor and it looks different that the other one I got from the junk yard

The ecu I put in was from a 1992 based on what I heard that won't work has to be a 1993 but I think this shows that the voltage regulator was bad on the original ecu

bassxj

Put a 92 computer in and still no spark

Ignition coil is getting voltage so could it be the coil?

bassxj

I put a new computer in and nothing it's a matching number computer. No pulsing ground going to coil so can this still be CPS which I replaced twice