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05-17-2017, 01:32 AM | #1 |
Registered User
Join Date: Nov 2011
Location: Idaho
Posts: 857
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Well this happened today.
Well after being on the road for five years, I experienced my first hiccup. I don't post a lot on this site but thought some may find this interesting. Here's a little back ground on my truck. The truck was built in 2012. Installed 2006 LS 4.8 4l60e. Modified the original harness myself. Drive by wire pedal, cruise control. Although I'm not a full time mechanic, I do have a back ground in automotive and full access to a shop with all the latest diagnostic equipment. Last night while driving my truck, it just suddenly stopped. Luckily the road was all down hill and I was able to coast back into town. After a tow to my friends shop, it took approximately two hours to figure this out. Let me back track a little, during the five years of being on the road, I experienced on three occasions that the truck was hard to start and require prolonged cranking. On one of the occasions after letting the truck sit for a while it started right up and would run. These incidents were so far apart from each time that I was unable to figure it out. In the shop, we checked crank, cam sensors both were good. Checked fuel pressure, it was a spot on. Checked injector pulse signal on the even side, it was good. Did not check the odd side we just assumed they were all pulsing. The truck had spark fuel and compression but would not run. We were really confused. We then ran an injector bleed down test. We found the injectors on 2 4 6 8 bank would bleed off pressure but 1 3 5 7 would not. Found odd side injectors were not getting any power. Traced the problem back to the fuse block. The fuse block was by current performance. I discovered that one of the connectors that the fuse pushed into was making intermitten contact with the fuse. It had worked itself back inside the box. I don't think the connector was ever seated correctly since day one. Think I also found my intermittent start issue. I'm not trying to say anything bad about current performance as I would use this same product again. Guess the moral of the storie is no matter what check your fuse box and make sure all the terminals are seated all the way down as this could have been a night mare.
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05-17-2017, 01:39 AM | #2 |
Registered User
Join Date: Nov 2011
Location: Idaho
Posts: 857
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Re: Well this happened today.
Here's some more photos of my truck and the fuse box.
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05-17-2017, 01:43 AM | #3 |
Registered User
Join Date: Nov 2011
Location: Idaho
Posts: 857
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Re: Well this happened today.
The fuse box.
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05-17-2017, 01:54 AM | #4 |
meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: Well this happened today.
I was helping another member here do some work on his truck, and his fuseblock (from BP, not from Current) had a similar issue. A couple pins on the fuseblock didn't feel like they stayed seated in the block itself, so if you removed or installed a fuse a few times, it looked like they backed out.
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05-17-2017, 03:02 PM | #5 |
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Join Date: Jun 2015
Location: Carlos MN
Posts: 2,132
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Re: Well this happened today.
Similar thing happen to me. It was the 12 volt switched to the computer. The connector plugged into the fuse block wasn't seated properly. It would loose contact and kill the car. Drove me crazy.
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05-17-2017, 09:57 PM | #6 |
meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: Well this happened today.
Sounds like the harness guys are ordering all their fuseblocks from China's finest electronics suppliers
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD
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05-18-2017, 09:24 AM | #7 |
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Join Date: Dec 2002
Location: Cactus Patch So. Az
Posts: 4,749
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Re: Well this happened today.
Thanks for the heads up!
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05-18-2017, 02:11 PM | #8 |
Senior Member
Join Date: Oct 2011
Location: Wolfforth, Texas
Posts: 976
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Re: Well this happened today.
Glad you figured it out, my factory fuse box that came with the crate motor had a bad connection to the main bars, caused heat and then several other issues. Replaced and all is good
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Craig 1966 Chevrolet C10 - Supercharged LS3 1968 Chevrolet Camaro 1957 Chevrolet 2dr Hardtop "It makes sence if you don't think about it" Mesquite 1966 C10 - LS3 W/ Air Ride http://67-72chevytrucks.com/vboard/s...=1#post4989763 |
05-18-2017, 07:19 PM | #9 |
Registered User
Join Date: Nov 2011
Location: Idaho
Posts: 857
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Re: Well this happened today.
I also noticed discoloration on the fuse itself especially where it was making intermittent contact. Looks like due to heat possibly small amount of arching going on for awhile.
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05-19-2017, 10:20 AM | #10 |
Registered User
Join Date: Jun 2015
Location: Carlos MN
Posts: 2,132
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Re: Well this happened today.
That's how I found the problem. As I was tracing all the wires I found the block had a melted spot on it where the connector was arcing.
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05-19-2017, 06:10 PM | #11 |
Registered User
Join Date: Nov 2011
Location: Idaho
Posts: 857
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Re: Well this happened today.
I guess this this must be a common problem, just took mine 5 years to fully act out.
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05-19-2017, 07:52 PM | #12 |
Registered User
Join Date: Nov 2012
Location: 9
Posts: 862
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Re: Well this happened today.
Good info, my harness has a very similar if not the same fuse block, Ill be sure to double check everything now.
On a separate note, your ls swap is pretty cool, it has that factory look like it was meant to be there. |
05-19-2017, 10:39 PM | #13 |
Registered User
Join Date: Nov 2011
Location: Idaho
Posts: 857
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Re: Well this happened today.
Thanks sprint. It's my DD in good weather. I was just going for the stock look and used the KISS method. Yes make sure you CYA by checking that box. Here's couple more pictures. i
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05-19-2017, 11:17 PM | #14 |
Post Whore
Join Date: May 2015
Location: Alabama
Posts: 14,671
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Re: Well this happened today.
That's a clean install daaaanz..looks like the factory made it that way..
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05-20-2017, 11:27 AM | #15 |
Registered User
Join Date: Nov 2011
Location: Idaho
Posts: 857
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Re: Well this happened today.
Thanks the inside of the hood has been painted since this photo just to help clean things up.
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05-21-2017, 12:44 AM | #16 |
Senior Member
Join Date: Oct 2012
Location: Miami, Florida
Posts: 959
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Re: Well this happened today.
i had that same problem from a current performance fuse box. my fuse box problem was related to the fuel pump relay. i replaced everything electrical that was related to the fuel pump. lesson learned. nice ,clean truck daaaanz67.
Last edited by dec010974; 05-21-2017 at 12:45 AM. Reason: spelling |
05-21-2017, 09:57 AM | #17 |
Registered User
Join Date: Nov 2000
Location: Huntsville Ontario Canada
Posts: 4,051
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Re: Well this happened today.
I am disappointed to hear all the problems everyone in having with these boxes. I paid a lot of money for the dual fan fuel/relay box and my engine harness. I figured it would come with extra pins to add additional circuits but it didn't. I can't find anyone to supply me with the terminal ends.
I have called Bill from BP Automotive but he will not return my calls. At first he was great but once I ordered my harness well.....he's vanished.
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05-21-2017, 12:40 PM | #18 |
Registered User
Join Date: Nov 2011
Location: Idaho
Posts: 857
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Re: Well this happened today.
Thanks for the compliment. I should have done a build thread on this truck. Took 6 months to build. It was a frame on build, everything was sanded frame wise. The only thing that's didn't get painted was the rop of the frame rail and under body. This included the ls conversion among a bunch of other things.
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05-21-2017, 12:54 PM | #19 | |
Registered User
Join Date: Nov 2011
Location: Idaho
Posts: 857
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Re: Well this happened today.
Quote:
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