Topic: 98 tj wont start

[JCAUDILL0034]

i put a head gasket on my 98 tj and got everything back together.....no start...i got fuel pressure at the rail and i got spark at the coil ....thinking asd relay but swaped it with the horn one and nothing still????any ideas

[JCAUDILL0034]

http://www.jeepforum.com/forum/f11/jeep-wont-start-479540/

anyone ever down this???where is the cps at unpluging it work???

[Dylan]

Recheck any connectors you had disconnected during the head gasket R2.

The crank sensor is bolted to the flywheel housing on the top left side and the connector should be near your manifold.

[sharpxmen]

do you have spark? did you plug back the vac hoses properly? did you plug back the tps, MAP, IAT, temp sensor(s), dist, coil, crank sensor?

do a run thru all these, if you're unsure of the vac lines take some pics and post them.

[JCAUDILL0034]

i have spark well it will shock you but no fuel pressure at rail now? i was going to get a relay but no one can get it

[Dylan]

No fuel pressure at the rail eh?  Do you hear the fuel pump kick on when you first turn the ignition switch on?

[sharpxmen]

i have spark well it will shock you but no fuel pressure at rail now? i was going to get a relay but no one can get it

You can bypass the relay for testing

you can use any generic relay that matches the amperage rating or bigger, just pull it and take it to an auto-parts store and you can pick one off the shelf

EDIT: when i said bypass the relay i meant to power the pump directly from the battery, that way you can see if it's the pump or circuit to the pump or the relay

[JCAUDILL0034]

i umpluged that sensor and turned the key 5 times and now it starts

[sharpxmen]

i umpluged that sensor and turned the key 5 times and now it starts

what sensor? the cps? it won't start with it unplugged

[JCAUDILL0034]

yea the cps unplugged it turned key off and on 5 times.............then pluged it back up.......then fired right up

[sharpxmen]

yea the cps unplugged it turned key off and on 5 times.............then pluged it back up.......then fired right up

i see - you could've done that w/o unplugging the cps (for future reference)

[JCAUDILL0034]

yesterday the jeep ran fine....now today i had to pump the gas like crazy to get it to start and when it did it missed like crazy....i pulled the wires off one at a time and 3-4 didn't kill the motor 1-2 did and my cat got red hot after about 10 mins of ruff idle???i thought timing but the distributer never was touched???i cut the cat off still misses but starts easier

[sharpxmen]

it's either you're running too lean or your ignition advance is too low (not enough spark advance) - the latter is very unlikely as it's controlled by the PCM, running lean is my guess and by what you explained previously (no fuel pressure) i think that's what the problem is - have you checked the fuel pressure? what about the fuel filter, when did you replaced it last?

[JCAUDILL0034]

it has fuel pressure put i have no gauge..............and i did a filter last year when i put the motor in there

[JCAUDILL0034]

it was the cat after all.............well kinda i already took the cat off but the mesh looking stuff was up in my pipe befor where i cut it.....cleaned it all out good as new.....kinda weird right???