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04-24-2024, 09:07 AM | #1 |
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Join Date: Jan 2007
Location: Mississippi
Posts: 2,121
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Cutting off going down the road
My daily driver acts like it has a gremlin, please help!
2007 classic (cateye), 1/2 ton plain work truck, 4.3 V6. 206k miles & has been a great DD, but about a month ago it started just cutting off while I was going steady 60mph down the road. I felt a miss/ jerk several miles before for only a second & then ran smooth as silk again then it just cut off ... no check engine lights on or anything. Threw in N & coasted to the side. It would spin over & then after a few tries, crank back up & be perfect like nothing happened... maybe for even a week or so, then happen again. Because of the initial jerking, I thought maybe fuel pump, but checked pressure & all that perfect. A co-worker said he had one acting similar & was the crank position sensor, since it was only $30 & 15 minutes, replaced that but did it again 2 days later. Last weekend replaced air filter (couldn't see the sun through it) & ignition relay (grabbing at straws), drove it Monday - Thursday (about 40 mile commute each day) with zero issues & was excited. Only for Friday afternoon going home to do it again - jerked once after about 10 miles from work, then cut off after about another 8 miles. Spin, spin & not crank (like no fire) then after sitting about 5-10 minutes it cranked like nothing wrong & made it home running smooth, no CEL or issues. What else should I look for... any ideas?
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04-26-2024, 07:05 PM | #2 |
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Join Date: Oct 2008
Location: Wentworth, NH
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Re: Cutting off going down the road
Look at some crank no start checklists and start testing.
Intermittents are miserable to find.
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05-03-2024, 11:46 AM | #3 |
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Join Date: Feb 2011
Location: Senatobia, MS
Posts: 1,295
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Re: Cutting off going down the road
Hatzie, sent you a PM.
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08-14-2024, 03:22 PM | #4 |
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Join Date: Jan 2007
Location: Mississippi
Posts: 2,121
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Re: Cutting off going down the road
Update - I guess I found the issue, it's been about 3.5 months & still running with no problems (knock on wood).
Cleaned both ground location on block, at front on passenger side & on rear of drivers side - they were both pretty funky. Also cut some length off & put new ring terminal on ground wire from ign coil that was connected at front passenger block location - it was green corroded a few inches up the wire... that was probably the specific issue.
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'72 C to K20 "Cannibalizer" http://67-72chevytrucks.com/vboard/s...32#post8653432 '85 K30 "Big Nassy" '01 2500 Suburban ...party wagon & tow truck '06 Silverado SS...DD '06 C1500 WT...DD '07 Classic C1500 WT...DD Built & sold cause can't keep 'em all: '72 Blazer "The Bucket" http://67-72chevytrucks.com/vboard/s...d.php?t=433190 '55 Chevy straight axle gasser https://www.trifive.com/forums/showthread.php?t=173938 '69 Pro Street Chevelle http://www.chevelles.com/forums/showthread.php?t=332541 '86 M1031 CUCV http://67-72chevytrucks.com/vboard/s...d.php?t=553619 |
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