When i start my jeep it will run for 30 seconds and then die ive put on a new fuel filter and tps the weired thing is i drove it for 20 miles todayand it ran great untill i stoped and put it in reverse then it died and started its 30 second thing again i drove it home and the same thing ive checked and there is no vacumme lines off and ive checked with starting fluid ive also charged the battery and it has the right volts and the charging system is working it doesn't over heat and doesent make any weired noises the motor is out of a 94 with all the 88 parts on it the jeep did not do this with the old motor and i drove it to where i took the motor out of it and the new one back in myself. iv'e changed the plugs cap rotor and wires as well ive went through all the wires to make sure there is not a broken one and there all pluged in right has anyone had this problem please help if you can thanks james
2007-04-07 21:12:54 · 6 answers · asked by myfyn69 2 in Cars & Transportation ➔ Maintenance & Repairs
all the sensors on the 94 were differnt so i put all my 88 sensors in
2007-04-07 22:13:04 · update #1
check the crank position sensor output. while cranking it is only 3/10 of a volt a/c.if yours will not put this much out replace it . if it does it must also be checked at the computer terminals [back probe only] it is typical to loose 1/10 of a volt through each connection point so an information service note was issued to separate the c.p.s. out of engine and body harnesses at firewall connector and by pass the connector by soldiering splices into place. do not use crimp connectors soldier only. using 60-40 rosin core soldier then heat shrink then tape back into harness neatly other than this i have seen a couple of intermittently failing coil modules give similar symptoms [fuel supply system and pressures ok]
2007-04-08 01:02:05 · answer #1 · answered by hobbabob 6 · 0⤊ 0⤋
Check the MAP sensor and fuel pump pressure. I had the same problem and found that the in tank fuel pump was bad. But before you do that, First check the fuel filter mounted on the frame under the vehicle. I am not saying that is the problem, but it could be. Since the engine is out of a 94 it should be fuel injected and requires the in tank fuel pump. Without it you can't maintain enough constant fuel pressure
2007-04-07 21:49:54 · answer #2 · answered by rhythmace 1 · 1⤊ 0⤋
If I understand you correctly you have a 1994 engine block and head with all the 1988 sensors and harness correct? You did not bring any of the 94 sensors with the motor? If this is correct then you have a sensor that is causing you problems. Question is which one is it. You need to have the system diagnoised with a driveability test to find out which sensor is causing you problems. Locate a good shop that has specilized in Drive-ability testing. they should be able to pinpoint the problem with a 15 minute drive.
2007-04-07 21:24:32 · answer #3 · answered by gearnofear 6 · 1⤊ 0⤋
hi me fellow fanatic with the Jeep shakes. the finest thanks to diagnose the priority is to have yet another Jeep ownerpersistent it. verify on your community section for an off highway club andpersistent out to visit. the possibilities are severe very solid that between the driving force followers will be prepared to take your motorized vehicle for a testpersistent. If the driving force does no longer locate the priority there'll be many others who favor to assist via diagnosing what's incorrect. they are going to get excitement from helping,. Now all you may do is pay for aspects and upkeep. i could be shocked if someone there did not choose that can help you finished the interest. So the relaxing contained in the sunlight means you do not could run. Mr Jeep receives some restoration and also you're literally not worse for positioned on.
2016-11-27 03:05:12 · answer #4 · answered by ? 4 · 0⤊ 0⤋
did you use the 88 flywheel or the 94 flywheel? possibly crank sensor triggers are different in those years , I would be inclined to say you have a problem with that sensor somewhere, test thuroughly, i have also seen the auto shut down relay cause a similar symptom you can get full data from a 94 computer, ck for rpm signal when cranking while vehicle is not starting. the computer gets its rpm reference from the crank sensor
2007-04-08 01:22:31 · answer #5 · answered by Susan B 1 · 0⤊ 0⤋
you checked the fuel filter but did yo ucheck the pump as well i had a car that did the same thing. would run great at high rpm but when it idols it would shut off. after a few weeks i still couldnt figure it out and changed all this stuff trying and one day it wouldnt crank at all, he fuel filter finally went all the way out and that was the problem
2007-04-08 02:26:08 · answer #6 · answered by bryan b 1 · 0⤊ 0⤋