Hey everyone. So the other day I was driving about a **** away from home and suddenly jeep died. Cranks but won't start now. My jeep is a jeep tj 1999 4.0l.
Earlier that day , I swapped out both o2 sensors and spark plugs and cables. I have them on the right firing order 153624.
Anyway, so after towing back home. And started to check my previous work. Come to find out the crank shaft sensor was pretty loose. Wobbling and when I touched it I could hear the fuel pump turn on. So I swapped that out. Try to start, no start. Turns over but won't start. So I check for spark. No spark. I switch out the coil. Now there is tons of spark. Still won't start....
I check for fuel. Checked fuel pressure and it reads at 40 with the switch on. Checked multiple times. So i have a functioning fuel pump.
I checked air pressure at spark plug. Cranked 3 times, gave me a reading of 140 psi.
Poured starter fluid in throttle body. Nothing. Still won't start.
Checked spark plugs again. They where pretty dirty from all attempts. Cleaned and reinserted. Nothing. They smell like fuel so I know gas it's getting there.
Can this be the timing belt?? The vehicle is a 160k. And I think it maybe jumped timing and won't get the pressure it needs to start.
I've checked every thread and forum and I have nothing. Waiting on a obd diagnostic tool o had ordered to help out.
Let me know if you ever had this problem or know or think what it can be.
Mike
Earlier that day , I swapped out both o2 sensors and spark plugs and cables. I have them on the right firing order 153624.
Anyway, so after towing back home. And started to check my previous work. Come to find out the crank shaft sensor was pretty loose. Wobbling and when I touched it I could hear the fuel pump turn on. So I swapped that out. Try to start, no start. Turns over but won't start. So I check for spark. No spark. I switch out the coil. Now there is tons of spark. Still won't start....
I check for fuel. Checked fuel pressure and it reads at 40 with the switch on. Checked multiple times. So i have a functioning fuel pump.
I checked air pressure at spark plug. Cranked 3 times, gave me a reading of 140 psi.
Poured starter fluid in throttle body. Nothing. Still won't start.
Checked spark plugs again. They where pretty dirty from all attempts. Cleaned and reinserted. Nothing. They smell like fuel so I know gas it's getting there.
Can this be the timing belt?? The vehicle is a 160k. And I think it maybe jumped timing and won't get the pressure it needs to start.
I've checked every thread and forum and I have nothing. Waiting on a obd diagnostic tool o had ordered to help out.
Let me know if you ever had this problem or know or think what it can be.
Mike