oFroz

I have a 1992 XJ Laredo 4.0 H.O. I6 that turns over but won't start. I have replaced the crank shaft positioning sensor. The battery is charging 12v. Fuel pressure is at 40 psi. We checked the rotor position on the distributor when piston #1 is at top dead center and the rotor is facing the exact opposite position of where it should be. How would I fix this?

freegdr

you have 2 tdc you must be on compression stroke for it to be on no1

oFroz

I just bump the engine until piston 1 reaches it's highest point right?

freegdr

nope you pull the no1 plug and put you finger over the hole and turn the motor over by hand you will fell air blowing past you finger thats compression stroke then turn it more untill the timing mark is at o thasts compression stroke thats why the air is pushung you finger its compressing dist should be pointing to no1

oFroz

Ok we did that and at the point when we felt the air the dist is pointing in the exact opposite position from no1, say no1 is 12 o clock the dist is pointing at 6 o clock.

freegdr

that is correct i just read it in my manual tdc compression stroke dist point to no 6

oFroz

Could you by any chance send a picture of the illustration it refers to?

freegdr

hang on im still reading it says 6oclock my book old hard to read

freegdr

when you bring it to tdc compression you setting the mark on the balancer on zero on the timing cover right

freegdr

on thes on timing cover

freegdr

i tried to send it email it says the file is to large cant send

freegdr

i got if of google search for it if you never removed the dist and yu line up the chain mars right which is different the ignition timing you should be ok these chains rarely break when trouble shooting this did you check for spark fuel and injector pulse

oFroz

The spark fuel and injector pulse is all fine, it was acting up before we took the dist out. I'm still not completely sure that's the problem. Do you have any other ideas why it will turn over but wont start?

oFroz

So when we checked it piston no1 is at tdc and the rotor is at 10 o clock not 5 o clock. I don't know what's going on

SeriousOffroad

The rotor should be pointing at 5 o'clock when the #1 piston is at TDC.

For the OP:
Post 15 of the following thread.
https://www.cherokeeforum.com/f2/col...e-4-0-a-23233/