Hewittxj

My 1998 XJ started fine 6 months ago now nothing she cranks loud almost like it's almost going to but no fuel pressure no power at coil

Also the gauges don't work but the odometer and lights on dash do

So far I checked this
-Replaced relay for asd and fuel pump
-Jumped the fuel pump and it will then kick on
-Jumped starter
-Replaced ignition switch
-Checked crank position sensor it's fine
- checked the fuses related to starting system
- started checking wires
- cleaned up all the grounds

What am I missing

Can it be the computer?????

Please help I am about to just part it out soon I have been at this for two months no progress

RTorrez1

I would start by finding a code reader and check it for any stored code. But, it does sound like you cps has gone out. The cps can test good but still be faulty. I had my cps tested on my 98 and showed good but it still wouldn't start until I replaced it with a new one.

TwistedWrench

Ya, that certainly sounds suspect of the cps. Your ignition, fuel pump, & gauges feed through the computer, dash lights feed directly off the headlight switch. Digital odometers are stored permanently in the system separately, so as to be tamper proof.

Try pulling the codes, often times when the computer takes a dump, you won't get any trouble codes at all.

Hewittxj

Throws a code for no bus

RTorrez1

One thing I should have mentioned. When it won't start try unplugging the cps and replug it then see if it will start. Sometimes doing this will get it to start if there is a problem with the cps. While you unplug it make sure that the plug connections are clean. Also check the wires to make sure they didn't melt. The melting of the wires is a common problem.

Hewittxj

Already tried that and checked it

Hewittxj

Replaced the crank position sensor today
Have fuel pressure FINALLY!!!!😆

However still NO SPARK!!!!😢

Please help no spark at spark plugs or coil power not going into cool harness either

Hewittxj

Ok so it's getting power to the asd relay
But it's only getting .44 volts to the coil wire harness I know it should get 12 volts
And two fuses in the box under the hood get no power I know one of them is a ignition system fuse

Hewittxj

It was the computer the whole time didnt need a cps. Got a 96 computer from the junkyard hooked it up all good started like normal.

number9

THANK YOU for updating the thread with your resolution and not just leaving it hanging. I am researching "no start" threads today and far too many of them just end.......

...