mj 2.5 no fire

[PUNISHER 2]

I have an 89 mj that sounds like the fuel pump is not priming and i'm not getting any fire. I changed the fuel pump relay and it started and ran for about 10 minutes then died.I changed the relays again but it won't start. I am no electrical wiz and I need some help. Thanks guy's!iratefla

 

[nekocopter]

Check the fuel pressure, if the pump wont prime, check the ballast resistor on the drivers side fenderwell.

 

[jeepcomj]

ballast resister is the long ceramic piece with 2 wires going into it. bypass it by simply connecting the wires together. if it operates then, then you need a new resistor.

 

[PUNISHER 2]

ballast resister is the long ceramic piece with 2 wires going into it. bypass it by simply connecting the wires together. if it operates then, then you need a new resistor.

well I cant even find it .Its obvoiusly been removed already but ,it did start until i moved it and then it died again. Maybe a ground or something?

 

[jeepcomj]

could be

check the front left inside of the firewall.

it will look something like this

http://www.randakks.com/Substiture Ballast Resistor1.jpg

 

[ComancheColt]

no ballast resistor on 2-5'ers

only on the 4.0

 

[jeepcomj]

later 2.5's had them last I checked. the 90 i'm lookin at has one...

 

[PUNISHER 2]

I cant find one on my 89. but it will start once in a while and i havent even touched it!I'll try and start it and it wont start then an hour later i'll try to start it and it will start ???????

 

[ComancheColt]

I cant find one on my 89. but it will start once in a while and i havent even touched it!I'll try and start it and it wont start then an hour later i'll try to start it and it will start ???????

its gotta be a 90-newer thing
my 89 doesnt
jeepco's 90 does.