Lucas

I was going abot 30 MPH and hit a bump, after that, My 1994 XJ will not start, it cranks but no start, No fuel pressure and no spark, I checked and replaced the CKP (did a turning test, turning manually the engine as in this very helpful site:https://troubleshootmyvehicle.com/je...crank-sensor-1 and looked for on/off signal, 5 Volts and nothing, BTW it was a real hell to replace, tried many extensions but endend up jst using a very short ratchet and my hands) tested it again and it was working on/ off and ran ok but still no start. I also checked for continuity on all cables ADS, CKP and CPS and all good, I had replaced the CPS a couple of months ago, so I discard that. So still no fuel pressure and no spark, any sugestions?

Roler

That ( see bold quote above) I don't understand.

Have you checked battery cables connected? Not kidding.

petejeep95

Check this fuse

Lucas

Sorry for not being clear, I ment the CKP, it signals 5 and 0 volts when turning the engine manually, after I replaced it, so that is not the problem. The battery cables are ok, it does crank and the instrument panel lights up, but I get no fuel pressure, (the pump is ok, bypassed the fuel pump relay and it does give pressure) no spark either.

Lucas

Sorry for not being clear, I ment the CKP, it signals 5 and 0 volts when turning the engine manually, after I replaced it, so that is not the problem. The battery cables are ok, it does crank and the instrument panel lights up, but I get no fuel pressure, (the pump is ok, bypassed the fuel pump relay and it does give pressure) no spark either

Lucas

Did check al fuses, but will re check this one again, thanks!

boxburn

Pull your starter relay and Auto Shutdown relay. If both have the same number of pins on them which I believe they do, swap them with each other and try again. If now you have no crank, the ASD relay is at fault, if it's the same, we'll have to keep digging.

llamley

WE has similar issue. Not sure what that sensor was that you changed, but we had a loose wire to the Crank Shaft Position Sensor CPS. Every time we hit a bump the car would almost die out.. Our CPS Sensor was still good, but the wire connecting it was almost toast., Wire had rubbed against metal for too many years. fixed the wire and we were good.

Roler

The CKP?

That (see bold) is some valuable information.
If you would look for a common area in this: ASD relay/circuit is involved in both of them, so that's what I would investigate first. It is not the only possibility, but a good start

evil_goat

From the comments, it looks like you have an electrical issue, but sometimes my jeep only starts in neutral.

Roler

That is typical for the NSS

OP's issue is it does crank (but not start); if its the NSS, it will not crank. Or tstart sometimes, like in your case, only in Neutral or after wiggling the shifter.

Lucas

I checked this Fuse, not the problem.

Lucas

Checked the ASD circuit and relay, and it all seems ok, I have continuity all the way to the PCM. Just in case, took the PCM out and took it to the lab to check, they will have an answer tomorow.

Lucas

Did that, not the ´problem...

Lucas

I had that issue 2 months ago, had to change the CPS sensor and do some fixing on the cablesi I checked the wiring all the way to the CPM and it seems ok, not the problem.