You might look at www.parts-express.com for replacement caps, although they specialize in in audio type capacitors. When repairing vintage stereo gear I like using erse brand caps. They're made in the USA and I've never had one fail. If I'm not mistaken, their caps will be fine for automotive applications.
Glad to hear that the 3 caps fixed this for many of you guys. It didnt fix my no start issue that had the same symptoms th... My symptoms sounded the same no fuel pump on.. Kid has had to leave key on 10 seconds to start for the last 6 months.. I had the caps here 105C ones. Pretty easy fix but still no start.. I think it is a PCM because if I put in a Junk yard one that may be a 96 or from a jeep that had security starts fine and pump goes on at key on but engine dies like it is shut off of air or fuel. at 3 seconds...
Originally Posted by elkski View Post
IIRC the security easily reset on OBD1 . Maybe some else has a clue.
I was mistaken my Junk yard PCM must have been from a 93-95 but one with security.. Someone on another thread told me I could have grounded the purple wire in the pass door and fooled this PCM??? I got a rebuild PCM for under 180$ shipped one from computer exchange in Florida... all is working now.
Thanks for this thread! I'm in the process applying this fix to my 94 GC after getting the wrong ECM as a replacement. For those looking for heavier-duty capacitors, Digi-Key sells an automotive rated 220uF 25V capacitor for $.99 each that are rated for 5000 hours at 125C, a bit higher than the 85C & 105C caps mentioned on this thread. Some of you may not need it that high, but I live in Phoenix & wanted to be 100% certain that heat wouldn't be an issue.
I have a 94 Grand cherokee with over 200k miles on it. I actually had 2 problems and this solved one of mine. This started out as a problem for me and was an on and off problem for a while. I chased my tail on it. first I thought it was a clogged fuel filter....then possibly a fuel pump issue. I had swapped out all the relays over and over. it used to take like 5 seconds to 30 seconds for it to come on then it got to be several minutes for the relays to click. Then I got a few times it actually shut off going down the road. I went down to RS and got the 3 caps and it starts up right away now...... I went through so many forums trying to find a solution... I was narrowing it down to the ECM and was dreading spending 300 bucks on one. for under 5 bucks it solved the starting problem. Thanks for the posting of this up.
Gonna be fixing a friends 95 in the next few days but wanted to post up an updated link to the capacitors for anyone else who needs it. These also have a 20 degree celcius higher temp rating than even the stock ones do so they should hold up to pretty much anything short of a engine fire!
Replaced my caps today during my lunch break, ordered the caps from Digi-Key as above and got them in two days. This is the kind of fix I enjoy, as a DOD Electronics Technician and Micro-miniature soldering tech.
Hey Thanks guys! I relpaced the caps in my 94 Dodge B250 conversion van. (I know its an old van but it is great for hauling my keyboard and amps to band jobs) I had been turning the key on an hour before I needed it to let the pcm and caps warm up. That is the only way it would start when outside temp was below 50 f. Thanks to your forum and photos I bought 3 new caps here in Maryland Heights, mo at Gateway Electronics. 2 of em were 220 uf and one was 470 uf. they were 50 cent each, caulked with clear silicone. It now will start in any weather! It is so nice to have it running great again. Thanks again and that was after I had sifted through hours of blogs and forums. I am always amazed at the advice people are willing to give when they don't know what they are talking about. Your worked!
St Louis, Mo
St Louis, Mo
Originally Posted by phillyeaglekgd View Post
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