please help... sooo stumped
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Joined: Sep 2011
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Model: Cherokee
Newbie
Joined: Aug 2012
Posts: 8
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From: Vermont
Year: 1998
Model: Cherokee
Engine: 4.0
This is a long shot, but have you tried throttle position sensor, or crank position sensor? I've had problems with both one in a Ranger and one in a Dodge Ram 2500. Throttle position sensor will act like a vacuum leak and your rpm's will be all over the place. Crank position sensor will basically make your engine run like s*** and both seem like a fuel problem. Like I said, it's a long shot, but check it out.
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Joined: May 2008
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From: +34° 25' 35.67", -81° 21' 12.04"
Year: 1993
Engine: 4.0
going to change injectors next, i did it the long hard way i knew i had a fuel delivery problem so i changed pump, filter, regulator.... still doing same issue backfiring threw airbox and exhaust, wont start, checked timing, and plugs thousand times over, exhaust is brand new w/ no leaks.... so i changed MAP,CTS's , TPS, CPS, plugs rotor, wires, checked all vacum for leaks everything looks good, checked all ground wiring. decided to put spar injectors i got off a 96 intake.... my jeep is a 95.... do injectors have to match computer year ? because it seemed to run lil diffrent "better?" ..... but still no solid start..... thinking about buying new injectors before i decide its a ECU.... any thoughts? any at all? thinking about changing manifold gasket... think i got something going on there....also going to change injector o-rings before i actually buy new injectors if i need them... im soo F***** stumped dont know what to do next
thanks
thanks
Newbie
Joined: Aug 2012
Posts: 8
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From: Vermont
Year: 1998
Model: Cherokee
Engine: 4.0
Junior Member
Joined: May 2008
Posts: 15,016
Likes: 11
From: +34° 25' 35.67", -81° 21' 12.04"
Year: 1993
Engine: 4.0
Ah, think you mixed up the plugs?
Not sure of the year of this diagram so compare colors and see if they make sense.
Not sure of the year of this diagram so compare colors and see if they make sense.
Last edited by Lowrange2; Aug 29, 2012 at 03:04 PM.
Thread Starter
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Joined: May 2011
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From: CT
Year: 1995
Model: Cherokee
Engine: 4.0l
lol not even close BTW haha its all good i think i found on on another forum as far as it looks they were correct.... well im heading back to auto parts store to return CPS and get another maybe it was a junk one.... who knows but honestly that the point im at right now... ruled out spark and fuel completly! done check and done both of those sytems like 100 times! F-IT worth a shot BBS!
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Junior Member
Joined: May 2011
Posts: 91
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From: CT
Year: 1995
Model: Cherokee
Engine: 4.0l
ok soo this is what happened, i actually had a spar transmision in basement haha with CPS on it tried it and it actually did something diffrent, check engine light went off and did some funny stuff.. did not run tho... like the ther one... ran out to advanced ***** at them and got another one... threw that in real quick was still hard to start right away but it started and engine actually sounds more fluid.... actually got rid of my hot start problem too... but still have to pumo gas little bit when im cranking it... today i took off throttle body and cleaned the heck out of it so im sure that helps.... but im thinking maybe i got a bad bump as well which would really **** me off ! sonow that its running again im going to drive the **** out of it and see if it calms down if not next step is to pull tank apart i guess AHHHH!
Thread Starter
Junior Member
Joined: May 2011
Posts: 91
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From: CT
Year: 1995
Model: Cherokee
Engine: 4.0l
yes fuel pressure is good, i just bought a guage... pressure drops off rather quickly i was going to get lines also regulator in the tank... i have to really pump the pedal while cranking to get it to turn over and start.
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Junior Member
Joined: May 2011
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From: CT
Year: 1995
Model: Cherokee
Engine: 4.0l
yes, i figured in the chiltons book that its only pressurized under key on position..... 1.) because the 95 and earlier have the fuel return line to the tank 2.) there a way to block of the return line? does that question even make sense?
yes, drops off, soon as i turn engine to off position you can just watch needle go right back to zero with in 5-10 seconds
yes, drops off, soon as i turn engine to off position you can just watch needle go right back to zero with in 5-10 seconds
Last edited by cherokeeadam95; Aug 30, 2012 at 08:52 AM. Reason: answer question
Thread Starter
Junior Member
Joined: May 2011
Posts: 91
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From: CT
Year: 1995
Model: Cherokee
Engine: 4.0l
Fixed! Bad pig tail connectors on the coolant temp sensor line and also the idle air temp electrical line had bad pig tail connections spliced in new lines and works like new! And not check engine lights!!!!!
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