Hello again, a bit of background this time on my xj dreams in hopes of finding some much needed help.
I recently hauled an almost free to me 1992 xj laredo 4x4 home. The engine had thrown a rod straight through the block and the owner decided to let it go for $300 bucks. I figured I could track down a used engine and have a nice little around town putter for less than 1k but I've ran into some issues.
I have installed a used engine with claimed milage of 115k with the same case numbers as my old one. I removed the oil pan to freshen up the gasket and was impressed by how clean everything appears to be, the oil pump is absolutely immaculate and there is some stamped marks on each of the pistons which correspond to markings written on the outside of the case. All this to say, that it had lead me to believe it had been rebuilt until, after installation, I encountered a crank but no start condition.
So far I have:
Rechecked timing; cylinder #1 is at tdc when at 0 on the harmonic balancer mark and the rotor in the distributor sits on the trailing age of post 1. post 1 sits at 5pm
Rechecked fuel Pressure; 35psi at fuel rail Schrader valve after letting the pump run twice and without cranking engine
Rechecked spark; spark verified by grounding to bolt and by test light
Replaced CPS; Such a common cause of no start issues, I could not pass on replacing it just in case despite confirming spark. replaced with autozone brand however and not mopar.
NSS; removed, cleaned and reinstalled without any luck. Back up lights work but no luck in park or in neutral.
Coil; resistance from connection to post at 13.33 and 1.3 between connector posts
Compression; All spark plugs removed, coil and fuel pump disabled, dry test at 5 cranks per cylinder
#1 120
#2 130
#3 120
#4 110
#5 120
#6 110
fuses and relays have all been checked I have unplugged and replugged ECM several times. I do have the headlights and grill off the car now in case i have to pull this engine back out. Any and all help is greatly appreciated.
I recently hauled an almost free to me 1992 xj laredo 4x4 home. The engine had thrown a rod straight through the block and the owner decided to let it go for $300 bucks. I figured I could track down a used engine and have a nice little around town putter for less than 1k but I've ran into some issues.
I have installed a used engine with claimed milage of 115k with the same case numbers as my old one. I removed the oil pan to freshen up the gasket and was impressed by how clean everything appears to be, the oil pump is absolutely immaculate and there is some stamped marks on each of the pistons which correspond to markings written on the outside of the case. All this to say, that it had lead me to believe it had been rebuilt until, after installation, I encountered a crank but no start condition.
So far I have:
Rechecked timing; cylinder #1 is at tdc when at 0 on the harmonic balancer mark and the rotor in the distributor sits on the trailing age of post 1. post 1 sits at 5pm
Rechecked fuel Pressure; 35psi at fuel rail Schrader valve after letting the pump run twice and without cranking engine
Rechecked spark; spark verified by grounding to bolt and by test light
Replaced CPS; Such a common cause of no start issues, I could not pass on replacing it just in case despite confirming spark. replaced with autozone brand however and not mopar.
NSS; removed, cleaned and reinstalled without any luck. Back up lights work but no luck in park or in neutral.
Coil; resistance from connection to post at 13.33 and 1.3 between connector posts
Compression; All spark plugs removed, coil and fuel pump disabled, dry test at 5 cranks per cylinder
#1 120
#2 130
#3 120
#4 110
#5 120
#6 110
fuses and relays have all been checked I have unplugged and replugged ECM several times. I do have the headlights and grill off the car now in case i have to pull this engine back out. Any and all help is greatly appreciated.
