88' XJ No spark!!! Going on a month PLEASE help!
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
injector pulse dist cps ......spark bellhousing cps .....assuming all other ignition parts are good and assuming your getting fuel the test have to be performed checking for codes is a must also here unless you have a idea where the prob may be occuring as with the ops spliced cps plug
CF Veteran
Joined: Jan 2011
Posts: 1,648
Likes: 0
From: Havana fl
Year: 1995
Model: Cherokee
Engine: 4.0L
freegdr, I will have to disagree with you on this. The ECM needs the CKP to determine TDC for spark and injector firing order, it needs the CMP to know what cyl to fire. With out one or the other it will still spark and pulse sometimes and try to run without the sensor in a limp mode. But I will need to know wether he has niether spark nor pulse to get an idea of whats going on. If he has no pulse either, then next I would check for ASD power to injectors and coil and such.
Originally Posted by 88XJW
The CPS Tested fine. The injector pulse im having a hard time with. Anything else that should be tested?
With your noids light hooked up, wiggle the fuel injector wire and see if that does anything, you can also use a volt meter
Originally Posted by 88XJW
NO light just a cheap mutimeter. About to go inspect those wires.
CF Veteran
Joined: Jan 2011
Posts: 1,648
Likes: 0
From: Havana fl
Year: 1995
Model: Cherokee
Engine: 4.0L
I would suggest either getting a noid light or a test light, test light can be had for about $2. Hook the ground clamp of the test light to the power side of the bat, and use a paper clip to probe the ground side of the injector harness. Crank the engine and the test light should flash. Or get a noid light and just plug it in, crank it over and it should flash. If you PM me I will have no prob trying to talk you through this over the phone.
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