xjridr23

hey yall i have a 89 cherokee pioner with 4.0 auto tranny it idle high a few times and then stoped..now it idle real low were u had to keep your foot on the gas was pullin in my drive way the other night and it stalled and will not start back up at all i have replaced cps sensor,cap,rotor,plugs,distributor,i have tryed everything could some one please help...when it first did it i was at astore unpluged the idle air control valve and it started right back up and idle high put it all back on and started up just fine now will not start at all has fire and fuel replaced the iac valve to still want start can someone please help this is my first jeep and i like it

freegdr

are you geting injector pulse

xjridr23

we pulled the rail off and they all sprayed and then we sprayed starting fluid in all the injector holes and it still did not fire what do u mean by pulse should they all spray at one time or one by one

freegdr

they should spray one at a timeinjector pulse is the signal it recives to make them squirt when they are supposedto

xjridr23

oh ok well when i would get on the gas it would not spit or or nothing get up and run could it be icm or not enough fuel im just lost on this jeep i have always been a chevy man but i love this jeep and yes they where spraying one at a time good clean pressure or could there be loss of compression

je4reyk

Check your map sensor the one mounted in the firewall,my plug for the wires was lose ,random stalls and finely nothing just cranked and cranked no fire hopefully its that easy for you!

freegdr

if you going to keep the xj you should really get a haynes manual these year jeeps you cannot get codes out the ecm is not set up this way you have to test all sensors with a meter its not hard to do . there is also a module in the distributor its the pick up coil check that

Bustedknuckle

+1 to injector pulse and yes i also agree you need to buy a haynes manual and yes because of these trucks not being obd2 you cant get codes and yes it seems like youve covered all your bases and yes you might want to consider using periods and yes im trying to make a valid point about how annoying run on sentences are





STOP!






Hammertime.

freegdr

here keep these handy put them in where you get lost.............................................. .................................................. ..........................

bajaman1

ok look here,i had that same problem a few months ago,it turned out to be a ceramic diode thats located next to the battery,you cant miss it its white and mesures about 3 inche in length 1/4 inch in diameter ,and has 2 wires hooked to it,it only runs couple of bucks try that and try it,that send a signal to your distributor.

freegdr

whats weird he says he has fuel and spark

xjridr23

Thanks guys I will have to try all those ideas but could it have lost comp in the cylinders

bajaman1

there's only one way to find out if you lost comp in one hole,rent a comp tester at you local autozone,or you culd try to put a little oil in each hole and start it,but it would have to be more than 1 hole dead to have this kind of problem,but it be best to test with a comp test tool

Bustedknuckle

If you blew the head gasket to hell and holy high waters, maybe. Or if you didnt put the plugs back in, maybe. Does it even try to crank? And if so, does it sound normal?

xjridr23

It turns over no problem we sprayed starting fluid in all the cylinders and still would not hit.the head gasket is not blown never over heated and no water in oil.could there be a certin relay.oh yes I for got to say one time before it died it sputtered one time when u git on the gas it was like it had no power but only did it once and the next day it just died