Vacuum leaks?
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Cargo Master
Joined: Apr 2004
Posts: 2,574
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From: Golden, CO
Vacuum leaks?
I'm having some trouble with my work truck. I can't just take things apart for a look-see, or run over to auto parts for a free scan.
The truck is a 2004 F-250 with the 6.8l V-10, 85,000 miles.
Are these engines known to have intake sealing issues?
Are there common areas for vacuum fittings or hoses to fail?
I don't want to get into the problem, or diagnostics. If I can't prove my theory, the truck gets parked, and I'm stuck in a dinky little Dodge until they can put it in the shop.
TIA, Mike
My ol' pal:
The truck is a 2004 F-250 with the 6.8l V-10, 85,000 miles.
Are these engines known to have intake sealing issues?
Are there common areas for vacuum fittings or hoses to fail?
I don't want to get into the problem, or diagnostics. If I can't prove my theory, the truck gets parked, and I'm stuck in a dinky little Dodge until they can put it in the shop.
TIA, Mike
My ol' pal:
Hotshot
Joined: Jan 2004
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From: St Louis
If I recall correctly, Harbor Freight has a mechanics stethoscope for about $3 that you could use to pinpoint a leak.
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Hotshot
Joined: Jan 2004
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From: St Louis
Nope, the computer is still too fast. All you can do is connect a scan tool and watch the STFTs while spraying. Those will tell you when you've hit the right spot.
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Joined: Jul 2002
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From: Long Island USA
Hypoid, check that infamous PVC plumbing elbow, right where it attaches to the throttle body. It's known to rot and/or crack. I'm lucky, mine is still good (knock on wood).
Other than that, no, the V10 and the modulars are not "known" for intake vacuum leaks.
What's the trouble? If it's running lean overall, clean the MAF and change the fuel filter.
Other than that, no, the V10 and the modulars are not "known" for intake vacuum leaks.
What's the trouble? If it's running lean overall, clean the MAF and change the fuel filter.
Thread Starter
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Cargo Master
Joined: Apr 2004
Posts: 2,574
Likes: 4
From: Golden, CO
Hypoid, check that infamous PVC plumbing elbow, right where it attaches to the throttle body. It's known to rot and/or crack. I'm lucky, mine is still good (knock on wood).
Other than that, no, the V10 and the modulars are not "known" for intake vacuum leaks.
What's the trouble? If it's running lean overall, clean the MAF and change the fuel filter.
Other than that, no, the V10 and the modulars are not "known" for intake vacuum leaks.
What's the trouble? If it's running lean overall, clean the MAF and change the fuel filter.
After talking to Shawns Fords, I'm leaning toward a fuel problem.
When I told Shawn the truck would die when it gets hot out, he thought the fuel pump might be starting to fail. The pump is only a year or two old, but one of our other V-10 trucks is having trouble as well. So far, it has gone though one fuel pump and three filters. Methinks one of the company's fuel trucks is delivering a load of trash when we fuel up.
The whole time this truck is acting up, the gauges read normal, no lights come on. I shut off to give it a cool-down, or park it overnight, no problem until the weather gets hot. I had a brand X with an aluminum top end act much the same way, except they were known to have gasket problems.
Time to requisition a fuel filter, and another can of sea-foam.
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