[jeep1993]

93 XJ, I recently purchased this. The previous owner had pulled the motor out and thought the bearing in the lower end was bad. It was only the flywheel. They reinstalled it. It will not fire. Does have fuel. Changed the crank senor (under the rotor in the distrib), crank position senor on the trans housing. Cranks over fine but does not fire. Owner said dist. was not pulled when motor removed. Help!!

 

[addicted]

Do you know how much fuel pressure it has? It can have enough pressure to fill the rail but not enough to fire the engine.

 

[jeep1993]

The fuel pressure is good. There is not spark, from the coil,or distrib.

 

[tom tom]

I changed the flex plate on my wife's 2000 xj and having the same problems. You find anything out post it up. For me everything is checking out , fuel pressure is at specs. It ran after I put everthing together and slowly shut down as it was running to the point where it's a crank no start.

 

[tom tom]

well check to see if you have power to the coil first . The power will have to come from the coil first before the dist.

 

[ajmorell]

Are the plugs wet with fuel after cranking? Check to make sure the injectors are actually pulsing. If they aren't then that would lead me to believe there is an issue with the ASD relay.

 

[jlb5001]

Had 89 do somewhat of the same thing and it ended up being the computer. Double check all your wiring connections could be something as simple as a wire not hooked up or one hooked up incorrectly. Good luck:bdr2:

 

[mhicks1017]

Auto or manual? I've seen the neutral safety switch go many times and it causes these symptoms. Computer disables spark. check to see if switch is broke, or unpluged.

 

[jeep1993]

Auto.

 

[87mopar]

this may be a stupid question but is the engine grounded?

 

[Tweeternpi]

Auto or manual? I've seen the neutral safety switch go many times and it causes these symptoms. Computer disables spark. check to see if switch is broke, or unpluged.

I thought if it was the nss it would not crank?

 

[mhicks1017]

The last one that I worked on the motor cranked, but would not start. found that it was unpluged, pluged it in, and it fired right up.

does this Jeep have an alarm on it?

 

[tom tom]

should of asked this sooner , are you sure they installed the right flexplate (flywheel) ?? The crank position sensor reads off the flexplate, which in return controls your spark to fire the engine. I would check the persons work you got it from first.

 

[ajmorell]

should of asked this sooner , are you sure they installed the right flexplate (flywheel) ?? The crank position sensor reads off the flexplate, which in return controls your spark to fire the engine. I would check the persons work you got it from first.

That thought crossed my mind as well, but I assumed they wouldn't make that mistake.

 

[ajmorell]

this may be a stupid question but is the engine grounded?

If the PCM isn't grounded then you'll hear a really fast clicking from the ASD relay. You'll get fuel pressure @ the rail but a pulse signals won't be sent to the injectors, that's why I asked if the plugs were wet with fuel.

 

[tom tom]

you know what happens when one assumes. It's worth checking out seeing you didn't do the work.

 

[ajmorell]

you know what happens when one assumes. It's worth checking out seeing you didn't do the work.

Yeah...I wasn't disagreeing with you....

 

[jeep1993]

It does have the correct flywheel.

 

[jeep1993]

The plugs are wet. The ADS relay clicks fast, when key is on before you start it.

 

[ChevelleSSLS6]

If the PCM isn't grounded then you'll hear a really fast clicking from the ASD relay. You'll get fuel pressure @ the rail but a pulse signals won't be sent to the injectors, that's why I asked if the plugs were wet with fuel.

The plugs are wet. The ADS relay clicks fast, when key is on before you start it.

looks like someone has some checking to do. Hopefully that's all it needs.:naughty: