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98 Cherokee crank no start

Xjkcb

NAXJA Forum User
Appreciate any help in advance. I recently bought a 98 4.0 aw4 231 previous mail jeep. Bought not running. New fuel pump installed 50psi with key on. Can crank jeep and keep spraying starter fluid and it’ll stay running only on starter fluid injectors don’t seem to fire and spark plugs are dry. However I also have an orange spark. I have verified both original and new coil are good. There is a little almost like a obd connector under the dash into a little black box that’s tied into several wires under the steering wheel. I have bought 3 separate crank sensors. Installed new distributor. Verified timing and tdc. When turning key to on I have momentary power to coil plug and injectors. I do not have constant 12v power at either the coil plug or injectors with key on. I do not have 12v constant power to fuse 21 (coil) or fuse 24 (o2) with key on. I have 5v power and 5v signal from cps and cms connectors. Have checked cps and cms for resistance readings as well. For asd relay I have 12v constant on pin 30 and 12v switched from 85. Pin 86 grounds for a few seconds which supplies the circuits with 12v the fuel pump also primes at this time. I have cleaned all of the grounds in the engine bay as well as new battery terminals. I have done multiple pin out tests but seem to find myself going in a circle now and unsure what is supposed to have power when and what readings. Also noticed when key is in ignition it sometimes beeps and other times doesn’t I can wiggle the ignition switch and it’ll beep or quit. Jeep cranks good and has 12v or 5v where it needs to be I’m assuming. Fuse 11 inside the kick panel fuse box also has 12v and all other fuses have been checked. Fuse 21 and 24 are the only ones that do not have constant power. Only when key is switched to on momentarily. For cel codes I haven’t really been able to follow a good trail with any of them. And they have not come back. I’ve swapped relays around. I have a 2000 xj that I’ve been sharing parts with as well to at least give me some direction. I’m thinking it is going to be a wiring problem but I’m going in circles now. Any help would be great thanks guys
 
There is a little almost like a obd connector under the dash into a little black box that’s tied into several wires under the steering wheel.

I would assume that is an aftermarket anti-theft device and needs a "key" plugged into it. I would do some research on any part number, brand name markings or serial numbers and determine how to remove it.

The spark should bright blue and snapping, an orange/yellow spark is a weak spark.
 
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I would assume that is an aftermarket anti-theft device and needs a "key" plugged into it. I would do some research on any part number, brand name markings or serial numbers and determine how to remove it.

The spark should bright blue and snapping, an orange/yellow spark is a weak spark.
Thank you for the response I will look into the box.
 
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