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Unread 05-23-2012, 12:37 AM   #16
pete1991YJ
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1991 YJ Wrangler 
 
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Quote:
Originally Posted by Anticanman View Post
Yeah, what ever happened to OldtimeIronman?

Meh. He's prolly "paying it forward" under an alias or something.

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Unread 05-23-2012, 01:48 AM   #17
MurtleDaTurtle
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1995 YJ Wrangler 
 
Join Date: May 2012
Location: Flagler beach, florida
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ecu

Quote:
Originally Posted by monsteryjjeep View Post
no start 95 wrangler 2.5 4cyl. cut off going down the road will not start bad its getting fuel just no spark replaced the coil twice and still no good. Checked everythings getting power but the tps, map sen 5v with key in on position. Codes 22,23,24 show up when I checked it. I know what they are but dunno why they would stop it from starting or getting spark they just control the fuel lean,rich part. Any ideas? Would greatly appreciate any.
Ecu had the same prob with my 95 yj 4.0. before I replace it i would get three diffrent codes also when it would rain heavy for days it wouldn't start.I would let it sit with the key on for 20 min before it would prime. I replace the fuel pump because i didn;t hear it prime, come to find out you ecu tells the pump to prime and turn your ignition on. I found company out of davie florida paid 120 bucks for rebuilt ECU they are called Auto computer exchange direct. The owner told me it is common the resister start to leak acid and short the board out.It will send you false codes. Since that I haven't had a prob for two years now.
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Unread 05-23-2012, 11:11 AM   #18
Que89YJ
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1989 YJ Wrangler 
 
Join Date: Apr 2008
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Thanks.......Pete.

I heard that Oldtime had a sense of humor and well the moderators did appreciate it. Then again it might have gone just a bit too far......

I am sure he is still around helping out where and when he can.
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Unread 08-15-2013, 10:47 AM   #19
CJ5_Fan
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Apologies for reviving an old thread but I just got an 89 YJ with the 4.2 and I don't seem to have a 'check engine' light on my dash. (at least it isn't illuminating with my key turned on ) Is there a alternate way to pull the codes with the key method or is the only option thru the diagnostics ports? If so, can a light be attached to any pins in the ports that will read out the codes visually?
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Unread 08-15-2013, 11:36 AM   #20
Que89YJ
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No diagnostics for the 87-90. You have to do it old school and use a meter, factory service manual, and common sense. You will find all the help you need if you post up a thread with the problem on the YJ.
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Unread 08-15-2013, 02:22 PM   #21
CJ5_Fan
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thanks. guess it is time to go 'old school' on it!
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Unread 12-09-2014, 09:23 AM   #22
Sunshine1
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I have a 1993 Jeep wrangler 4.0L 6cyl , automatic .
I have put new plugs, wire, distributor cap and rotor, new coil pack. Hears the issue I will be driving and all of a sudden it acts like its running out of gas, i have plenty of fuel in it, when you push the accelerator it will bog down and back fire a little , i can hear the fuel pump whining constantly, all of my gauges are fine, I'm not sure if you can hook a computer to a 93 to check whats wrong , should i go ahead and replace the fuel pump or o2 censor or both? I appreciate any and all help.
Thanks , Amy
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Unread 12-09-2014, 05:27 PM   #23
pete1991YJ
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Quote:
Originally Posted by Sunshine1 View Post
I have a 1993 Jeep wrangler 4.0L 6cyl , automatic .
I have put new plugs, wire, distributor cap and rotor, new coil pack. Hears the issue I will be driving and all of a sudden it acts like its running out of gas, i have plenty of fuel in it, when you push the accelerator it will bog down and back fire a little , i can hear the fuel pump whining constantly, all of my gauges are fine, I'm not sure if you can hook a computer to a 93 to check whats wrong , should i go ahead and replace the fuel pump or o2 censor or both? I appreciate any and all help.
Thanks , Amy
Welcome to Jeep Forum, you've just found one of the best jeep sites anywhere!

Nope, there is no need to hook a computer to a 1993 jeep, in fact I don't think there is any way to do so. You can read the codes yourself directly off the check engine light.
Its easy and free, all you need is the ignition key. here's the updated video link that shows how:

In your case I would question the fule pump and or filter first - put a fuel pressure gauge on the fuel rail and see. It should be about 31 PSI.
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Unread 12-11-2014, 01:40 PM   #24
TennesseeYJ
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YJ's are real simple .. Video at the bottom of this link. Get DTC - Click here

Just turn the key on .. off .. on .. off .. on (not trying to start it). The trouble light will spill the beans!
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