Fixing lazy PCM. New caps writeup. - Page 5 - JeepForum.com

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post #61 of 162 Old 03-21-2011, 12:38 PM
LagartoJuancho
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Works for newer type computers too!!

Guys, I'm happy to announce that this solution also applies to newer type PCMs in XJs!!!

I just repaired mine yesterday and it starts in a split second now!!

They actually ARE THE SAME CAPACITANCE, VOLTAGE AND TEMP RATING as the ones depicted in this thread. The disassembly is a bit more challenging AND you have to be a bit more careful, but as I can testify, they're quite repairable...

I'll be posting some pics soon in a new thread for you to peruse.

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post #62 of 162 Old 03-22-2011, 08:15 AM
LagartoJuancho
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Quote:
Originally Posted by LagartoJuancho View Post
Guys, I'm happy to announce that this solution also applies to newer type PCMs in XJs!!!

I just repaired mine yesterday and it starts in a split second now!!

They actually ARE THE SAME CAPACITANCE, VOLTAGE AND TEMP RATING as the ones depicted in this thread. The disassembly is a bit more challenging AND you have to be a bit more careful, but as I can testify, they're quite repairable...

I'll be posting some pics soon in a new thread for you to peruse.
here is the writeup, in case anyone needs it
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post #63 of 162 Old 07-14-2011, 04:55 AM
mike_breaker_5
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old thread. posting to sub. after replacing sensors, relocating grounds, and pulling out hair i am glad i found this thread. i hope this works.

to all those that bought the 85 degree rated caps where do you live? it was 80-90 degrees here last week and over 100 a month ago. does radio shack have higher rated caps that will work? i'm electronics retarded and would need help getting the correct cap.

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post #64 of 162 Old 07-14-2011, 08:16 AM
stancomm
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85C caps.

First off, consider how long those dreaded 85C guys held out before they rolled over. 1996 to 2011, not too shabby.
If that's what you were able to get and use, well they shouldn't leave you stranded for a good while. Also, that's 85 degrees Celcius, or a 185 Farenheit, pretty darn hot!
The 105C guys can be had from an outfit name of Mouser Electronics... good folks. Their website takes a bit of getting used to, but does work.

Stan
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post #65 of 162 Old 07-14-2011, 09:16 AM
JS97ZJ
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An engine bay can get up to 250* F in the summer. The electronic components in motor vehicles are designed with that kind of atmosphere in mind. RS doesn't carry automotive components. They make their living selling phones and ipods.

Mouser or Online Components deal with all electronic genre. Look in their Automotive components drop-down lists.
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post #66 of 162 Old 07-14-2011, 07:07 PM
mike_breaker_5
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Quote:
Originally Posted by stancomm View Post
First off, consider how long those dreaded 85C guys held out before they rolled over. 1996 to 2011, not too shabby.
If that's what you were able to get and use, well they shouldn't leave you stranded for a good while. Also, that's 85 degrees Celcius, or a 185 Farenheit, pretty darn hot!
The 105C guys can be had from an outfit name of Mouser Electronics... good folks. Their website takes a bit of getting used to, but does work.

Stan
i was thinking F not C. i think i'll try my luck with the 85c rated. at very least i'll find out if that's my problem, and after they go bad again i can get the higher temp rated caps. thanks for the info folks!

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it's not much to look at... but it's mine.
5.2lswap, metalcloaks, bedliner, tucked belly, d60's, soon to be nv4500 and d300.

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post #67 of 162 Old 07-14-2011, 07:35 PM
JrMechanic
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I used the 85c capacitors from Radio Shack 3 years ago and have had zero issues since.

Want to swap an NP242 or NP231 into your ZJ? Here's how:

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post #68 of 162 Old 10-26-2011, 10:21 AM
gamble
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Stupid question. Isn't this the tcu? My PCM has 3 plugs on it.

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post #69 of 162 Old 10-26-2011, 10:44 AM
JS97ZJ
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This is for the 93-95 PCMs
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post #70 of 162 Old 11-29-2011, 10:33 PM
oldmancrash
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OMG Thank you for this writeup. I have a lot less hair now and so do some of my friends that still will talk to me. I hope to take tomorrow afternoon off just to fix this dang thing.
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post #71 of 162 Old 12-03-2011, 01:37 AM
oldmancrash
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Thank you very much for the very helpful write-up. My jeep now starts and even seems to run much better. Thank you
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post #72 of 162 Old 12-03-2011, 06:22 PM
jeep210
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Quote:
Originally Posted by oldmancrash View Post
Thank you very much for the very helpful write-up. My jeep now starts and even seems to run much better. Thank you
Glad to see that this solved your problem.
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post #73 of 162 Old 12-13-2011, 11:38 AM
dalton1234
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help my guys!!!! i have a zj and i recently replaced coil, pick up coil, crankshaft sensor, fuel pump, ecm and coil.. and it will start sometimes and sometimes it wont..... anyone have any suggestions ?
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post #74 of 162 Old 12-13-2011, 12:12 PM
JS97ZJ
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Post the problem and symptoms in a new thread. No one is going to look into an old thread to help solve a new problem.
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post #75 of 162 Old 02-23-2012, 12:04 PM
elkski
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I know this is an old thread but I was looking to order some 105C caps from mouser (also digikey is out of stock) and they are back ordered for the UTT ones.. they do have UHE and some others... SOme say they are water based and not for Auto applications.
Anyone have a good place to order the higher temp ones. I see many radio shack 85C ones worked ok but I figured if I ordered the right ones they would be here in no time.
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