shaneo417

well i might as well start from the start, i have a 1991 jeep Cherokee 4L. i was driving down the road and it stalled, i started her back up again and it was ruinning like it was miss firing and really ruff and died. it now will turn over and it wont keep it running, it just dies right away. when it first died i could get the revs up to 3500 and it would hold it there but once you let off the throttle it dies, now you cant rev it up at all it just kills it. probably a month ago i got new plugs cap rotor all that good stuff. got any ideas?

thundaluvin

Sounds like a plugged fuel filter, CPS, or possibly a fuel pump. Start by checking the CPS and go from there. Could also be an ignition coil.

shaneo417

it gets spark, and i do hear the fuel pump kick on

thundaluvin

if you have spark and the fuel pump is working, check the fuel filter. check the fuel pressure at the fuel rail.

shaneo417

yea i only have around 15 to 20 psi for a couple seconds, is there a pressure regulator somewhere or is it in the tank with the pump?

thorguy57

seems pretty low. Change out your fuel filter first. If you haven't changed it in awhile it would be worth changing even if thats not the problem.

tjwalker

Fuel filter first.

Then fuel pump.

shaneo417

i checked the pressure right out of the pump ( right before the filter) and its the same so im gunna amuse its the pump

Bustedback

Silly question: Is there gas in the tank?...You would be suprised of how many fuel pumps get replaced just to find there is no gas in the tank.

its_deer_not_jeep

id replace the filter before that tho its usually the 5 dollar part that curses our cars/trucks to not run and even if it is the pump its always good to replace the filter

shaneo417

yea there sgass, just got some the day before she died, i hear the pump turn on tho, and it does spit out gas ( i unhooked the line at the filter and put a gauge on it ) but it doesn't hold the pressure.

shaneo417

could the problem be the ballast resistor ?

GoldXjWa

Try crank angle/ position sensor.. Had that happen with mine.

shaneo417

would that have any effect on the low fuel pressure tho?

CheepJeap

Did you check for pressure before the filter or after? If your not getting fuel to the rail, check your lines and make sure you don't have a kink. CHANGE THE FUEL FILTER! it's too cheap to skip the step, when you pull it out, dump what's in it into a cup or bottle. Look for mud/dirt. If there is any of that, possibly dabree clog.