[Roadster72]

Hey guys. New to the world of jeep. just bought a yj on criagslist at a steal. My odometer wasnt working so i did so research and found it there was a plug on the transfer case that some times gets dirty. so i pulled the plug and cleaned it with some contact cleaner. didnt work. pulled the whole gear and all to check it wan looked great. put it back and it didnt want to start. used a test light to check to see if it was getting power and heard what sounded like the fuel pump kick on. prior to all this it ran great. pulled the plug on the transfer case and it started up again put the plug back on and it still ran fine. later that night i started it up and it ran for a couple of min and stalled but started back up. drove it about a mile home and stalled and wouldnt start again. checked the fuel rail and am getting fuel and hear the pump kick on. im trying to figure out if maybe i blew a sensor or the ecm ecu. any ideas.

Thanks
Dom

92 YJ

[rustywrangler]

Sounds like you need to run the codes test: OBDI Error/Check Engine Codes - JeepForum.com Community Jeep Wiki

[Louie4]

See if you can get any codes out of it. Just turn the key On-Off, On-off, On. Count the flashes and see what happens.

Check this out on post #6 and 7.

http://www.jeepforum.com/forum/f12/frequently-asked-questions-faq-your-answers-usually-here-451154/

[Roadster72]

ok checked the codes. im getting a 12 and a 33 and a 55 which i believe is the end of the codes. from what im reading there is no 12 and 33 is Air conditioning clutch relay, in which case i dont have any ac unit. so now im even more lost lol. these are the codes i found online at Jeep Horizons :: 1991-1995 Jeep Wrangler (YJ) Trouble Codes

11
Ignition
13
Manifold Absolute Pressure (MAP) Sensor Vacuum
14
Manifold Absolute Pressure (MAP) Sensor Electrical
15
Distance sensor or circuit
17
Engine running too cool
21
Oxygen sensor or circuit
22
Coolant temperature sensor or circuit
23
MAT sensor or circuit
24
Throttle Position Sensor (TPS) sensor or circuit
25
Automatic Idle Speed (AIS) circuit
27
Fuel injector control
31
EVAP solenoid or circuit
33
Air conditioning clutch relay
41
Alternator field
42
Automatic shutdown relay
44
Battery temperature sensor
46
Battery over voltage
47
Battery under voltage
51
Oxygen sensor - lean condition
52
Oxygen sensor - rich condition
53
Internal engine controller fault
54
Distributor sync pickup
55
End of Code output
62
Emissions Maintenance Reminder (EMR) mileage accumulator
63
Controller failure EEPROM write denied

[Mean Max]

This sounds like a case of a bad ASD relay (Auto Shut Down relay) located in the PDC. Usually, a bad ASD will cause it to start, then immediately stall. It's a standard 5-prong relay.

PDC - Power Distribution Center

Relays - The ASD relay is the center black relay in my '91 PDC. Refer to the diagram under the lid to make sure you know which one is the ASD on your YJ.

Max

[Roadster72]

Thank you all for your help but it seems that the major problem was very minor and dumb. i checked to see if i was getting good spark and it was intermittent. so i then checked the plug for the coil which has the little lock broken off. pulled it out then pushed it in and wal la it works find. gonna find a rubber band to hole it in better. why is it the stupid little things that piss ya off the most lol.

Dom

[loverocks4013]

Mean Max.....the codes I got were one for the AC which I don't have and the other was for the EGR System?? I am going to look this up...but when you get this can you give me some assistance? Thanks so much

[idaholtby]

#12 just means that the battery was disconnected sometime within the last 50 starts. Nothing to worry about and is a normal code to have stored. It does not cause the CEL lamp to light. Glad to here you got it fixed!

Also, your '92 does not have an EGR system. It has a CCV (Crank Case Ventilation) which relies on a three-way catalytic convertor to knock down the NOx emissions.

[loverocks4013]

Idaholtby...are you referring to me?? and my 1993 ACtually I think its my ignition switch...well I hope so anyway...lol