No spark..replaced crankshaft sensor, ignition coil, distributor(rotor and cap) - JeepForum.com

 
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post #1 of 5 Old 03-08-2009, 08:13 PM Thread Starter
amsgwp
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No spark..replaced crankshaft sensor, ignition coil, distributor(rotor and cap)

What do I do next? I have a multimeter so is there anything I can check before replacing the computer? It's $250 and I don't even know if that is going to fix the problem. I once found something on the internet about some specific wires that get corroded easily and need to be checked but I have been unable to find this anywhere.

Any help will be much appreciated!

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post #2 of 5 Old 03-08-2009, 08:16 PM
EK91YJ
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Was there any codes from the computer?

Red 2.5l 4 inch Rubicon Express
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post #3 of 5 Old 03-08-2009, 08:19 PM Thread Starter
amsgwp
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that is the first thing I am checking when I get to the jeep. It's in the fiance's garage so I don't have quick access to it. I'll go over in the morning and check for codes.

Out of all the searching I did last summer, I never found anything about checking these codes. But I did find that information today. So I'm going to check it first thing and see what codes it shows.

If the ECU is shot, what type of code would I expect? Would anything show?
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post #4 of 5 Old 03-08-2009, 08:40 PM Thread Starter
amsgwp
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Okay I found this great thread on repairing the ECU

http://www.jeepforum.com/forum/f12/how-repair-your-ecu-591031-post6007666/

Now, I have a quick question about this thread. The ECU's he fixed did not contain this gel(jello like) covering over the electrical components. How do you remove this stuff?
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post #5 of 5 Old 03-08-2009, 09:16 PM
sentinal02
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Quote:
Originally Posted by amsgwp View Post
Okay I found this great thread on repairing the ECU

http://www.jeepforum.com/forum/showthread.php?p=6007666

Now, I have a quick question about this thread. The ECU's he fixed did not contain this gel(jello like) covering over the electrical components. How do you remove this stuff?
actually that thread is for a pre 91 2.5L engine controller. you need this one, and the thread that will isolate the computer as being the problem.

http://www.jeepforum.com/forum/f12/crash-course-brain-surgery-replacing-capacitors-ecu-492597/

http://www.jeepforum.com/forum/f12/91-hard-no-start-long-cranks-cold-explained-490788/

RIP: '88 YJ 2.5L Ax-5 NP231
Posi-Loked. Herculined. Optima yellow top. 1" Shackle, 2" BDS. Cragar 397's Aussie front.

92 YJ 4.0L Ax-15 231
5" springs, 1" shackle 31's or 35's depending on my mood
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