ok i have and 89 jeep xj
wont start!
one day i was driving and it started cuting out and would die if i floored it! but made it home! next day pulled the fuel pump and it pumped fine! hooked it back up checked fuel pressure at the rail and it was 37 wich the manual say 31 is good

now it wont start!

i have been having problems with the ignition not starting so i riged a wire off the starter soilnoid and i have had luck with that for awhile

but i have replaced

ignition swich
coil
spark plug wires
spark plugs
distributor
cap and rotor
cps
tested the icm
pcm
nss

but i noticed that the fuel pump relay chatters when i turn the key on? and i dont get spark at the coil, but when pulll that relay i get spark but loose fuel pump? wth

 

Try switching that relay with another known good one. Also I would check the signal for that relay and make sure it's good. Take a look at the ballast resistor on the left fender and make sure it isn't broken.

zedpapa

 

and your alt is working?

 

mine did something similar, i ripped the exhaust off in the woods, then like a week later when i put it all back together it wouldn't run well, and when you floored it it would die,

turns out the cat was blocked

i unbolted the exhaust after the header and it ran fine

so i just took a large pipe and smashed out the insides of the cat converter

still doesn't run perfect because the 02's are reading wrong, but now i can drive it again

just unbolt the exhaust after the header and see how it runs

 

New relays and I can't even get it to start! Why the altinator

 

is it manual or Auto?

 

i see you did replace the NSS. did you get it adjusted properly? is it cranking and not starting or is it not cranking? what is the condition of your battery?

zedpapa

 

I put it on the exact way it came off and optima red top! And it's not cranking with the swich but it will when I disnocent the plug under the dash and conect hot to the green wire

 

AUTO

 

have you checked the starter solenoid on the right fender,where all the power wires go to from the battery?
check the wires to it make sure they are tight and in good shape.

 

if its not cranking with the key, then either the ignition switch is bad or the NSS is not adjusted properly. take a look at those and get them working right before going any further. just because the NSS is in the same place as the old doesn't mean its in the right place.

zedpapa

 

X2 with nss, I went through this same prob a few weeks ago replaced the nss, but I didnt make sure it was lined up properly. rechecked it and lined it up and all is well now.

 

New ignition swich and the wires are tight on the starter

 

My friend had a similar problem and we went to AZone and bought a heavy duty momentary push button and ran two wires to the starter and solenoid and now he starts it like that...Tj

 

ok she is perfect now, made a good ground from the computer to the body and did the same for the tps, icm, starter relay, and that fixed it

renix systems are known for this just fyi!