- #468 of 511
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Re: HELP!!!! clunk in front end HELP!!!!!!! [jlflemmons]
by gmck9
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May 15, 2008 (3:56 am)
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Replying to: jlflemmons (May 14, 2008 4:41 am)
MAn bad news.....noise still there.....I think Im gona put this piece of junk up for sale.....Im not gona mess with this junk any more.....not 1 mechanic on this earth can figure out what it is.....and the noise is bad enough where Im not gona wait around to find out what is gona be a huge repair down the road.........something is slapping the frame or something solid as the frame or engine or tranny.....I though gmc's were good? But i guess I got the only 
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- #469 of 511
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Re: HELP!!!! clunk in front end HELP!!!!!!! [gmck9]
by jlflemmons
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May 15, 2008 (5:22 am)
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Replying to: gmck9 (May 15, 2008 3:56 am)
Well, I wish I could hear the noise and give you a hand. These little beasts are just not that complicated, so I cannot imagine why the mechanics cannot locate the noise.
Don't let this issue sour you on the S series vehicles. I have had five and all have been very dependable vehicles. I have to believe that these guys are missing something obvious like a motor or tranny mount loose, spring pad missing, something like that. There just aren't that many things under there to go clunk.
Jim
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- #470 of 511
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Re: HELP!!!! clunk in front end HELP!!!!!!! [jlflemmons]
by gmck9
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May 15, 2008 (5:33 am)
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Replying to: jlflemmons (May 15, 2008 5:22 am)
I looked at more forms, and some were saying the shock mount can wear out and cause looseness.....I'd think it would be an obvious thing we can see.....I can grab the driver side shock and twist it, which it makes a slight clunking(same noise)......is this something that can be replaced? Or will I have to have new mounts welded on? This is happening on both sides.....all the mechanics were all over the front shocks....no one thought the play was a concern.....should there be ANY play there? I wouldnt think so........
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- #471 of 511
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Re: HELP!!!! clunk in front end HELP!!!!!!! [gmck9]
by gmck9
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May 15, 2008 (8:20 am)
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Replying to: gmck9 (May 15, 2008 5:33 am)
Well, let me remove the last post......the towers werent wallowed out, but they were kinda pushed apart, which just took a little grunting and I pulled it together. However what I didnt notice until then was the rocket science mechanic had put in the lower ball joint bolts upside-down, causing the bolt to dig into the boot that holds the greese-  he wins the ASE mechanic of the week award!!!!! Is it just North Carolina or does this happen elsewhere......now I've been scammed by the Napa auto care guy with the Autozone parts that were supposed to be Napa parts, and now the ASE mechanic of the week mishap> My poor car 
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- #472 of 511
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Re: HELP!!!! clunk in front end HELP!!!!!!! [gmck9]
by jlflemmons
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May 15, 2008 (8:22 am)
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Replying to: gmck9 (May 15, 2008 8:20 am)
Have you considered a GM service department???
(ducking and running for cover )
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- #473 of 511
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Re: HELP!!!! clunk in front end HELP!!!!!!! [jlflemmons]
by gmck9
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May 15, 2008 (8:19 pm)
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Replying to: jlflemmons (May 15, 2008 8:22 am)
ROFL!!!!!!!  ...Well, after this mess gets taken care of(the napa control arm bushings put back in), yes I agree a dealer is gona be the safest bet. Where I moved from my local mechanic had a jimmy also for a personal vehicle, so he was all up on these things. That is a 5hr drive one way or I'd be going to him. Looks like i have some dealer shopping to do, but I'll surely let ya know progress on the noise for you and other people reading this whole post 
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- #474 of 511
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GMC Jimmy ECM Fuse
by darren04
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May 16, 2008 (9:59 pm)
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Hey everyone,
Im stumped...1995 GMC Jimmy, The ECM fuse (fuse #10) keeps blowing in my truck, which causes the truck to stall out until fuse is replaced. I've looked for loose wires, shorts everything and I cant figure out why it keeps blowing! Anyone have any help? What should I check since its just the ECM fuse blowing?
Thanks,
Darren
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- #475 of 511
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Re: GMC Jimmy ECM Fuse [darren04]
by gmck9
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May 17, 2008 (4:25 am)
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Replying to: darren04 (May 16, 2008 9:59 pm)
Well, first when diagnosing a problem.....what does the ECM fuse directly supply power to? A fuse is a load limiting device like a breaker in your house electrical pannel. Fuses are only to limit loads.....so the device(devices) on that fuse are malfunctioning, causing a higher load on that circuit. I looked up what fuse #10 does....if it is correct, #10 does pcm module, and ignition module, also, all the fuel injectors. Knowing these vehicles, and yours is a '95 model......I'd first start with having a fuel pressure gauge put on the fuel line check valve located behind the plenum(i thnik its spelled like that). If you havent changed the spyder assembly yet from the lines dry-rotting from heat under the plenum, then this may be causing the fuel pump to overwork trying to keep fuel pressure up in the 52 psi range. When you hook the fuel pressure gauge up to the check valve, start the engine to get pressure(over 50psi)....then shut engine off leaving the gauge on the vehicle.....it should stay the same....NO DROP AT ALL!!!!!!! If it moves....there ya go. New spyder assembly for you and its really expensive so I hope for you its not. And if that check comes back O.K.....then change the fuel filter to make sure its not clogged(good to change anyway with all this junk gas).....if those two things dont help....let us know.
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- #476 of 511
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Re: GMC Jimmy ECM Fuse [gmck9]
by darren04
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May 17, 2008 (10:02 am)
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Replying to: gmck9 (May 17, 2008 4:25 am)
Hey thanks for the speedy reply, so heres the scoop. Fuel pump, filter and the CPI unit (the spyder thing) have been replaced. The truck was just in the shop and they said the fuel pressure was good. They sugested a loose wire or short somewhere but yet couldnt find anything. I drove the truck today and so far no blown fuse, but then again it did that yestureday, drove fine then bam fuse gone. Could it be something that simple as a lose wire or bad connection? And if so where would I start to find this and why is it only fuse 10?
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- #477 of 511
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Re: GMC Jimmy ECM Fuse [darren04]
by jlflemmons
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May 17, 2008 (12:03 pm)
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Replying to: darren04 (May 17, 2008 10:02 am)
could be an intermittent problem in the ECM itself. The electrical system in the vehicle supplies power through the ECM fuse, but there are further electrical filtering circuits in the ECM itself that could be failing. Very tough to diagnose intermittent problems like these. Try to be observant to any other behavior of the vehicle when the failure occurs. A big part of troubleshooting is observation and logic.
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