Intake Manifold Failure
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Joined: Feb 2025
Posts: 7
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Intake Manifold Failure
I want to post this because with the maf unplugged I managed to drive about a hundred miles with this damage to the intake. The hole in the lower part of the intake is roughly 2 in wide by 6 to 8 in tall.
I'm pretty sure I understand what happened because it started with damage to the coolant Parts allowing coolant into the intake and into the spark plug holes which cause misfires and backfires which I believe is what damage the intake itself but the damage was already there and the intake was going to be replaced anyways.
When I originally pulled codes I got one for the map sensor, which if you know these trucks that can lead you down a wild goose chase for three or four sensors if you don't have the correct tools and a code reader with a live data to verify what's up and I didn't have either at the time.
When it cut out of me it wouldn't make a grade I disconnected the maf sensor and I drove another hundred miles before I ended up pulling the alternator after replacing the maf and saw this which suddenly everything made sense and I replaced my intake right then and there.
What blows me away was this truck was still able to do 55 mph down the highway with a hole in the intake like this with the maf disconnected.
Fuel my drop to 5 miles a gallon and idle consumption increased to about 2 gallons per hour or more.
But the truck was still running and driving.
[img alt="2007 4.6L intake manifold hole
"]https://cimg4.ibsrv.net/gimg/www.f150forum.com-vbulletin/2000x1504/20250212_112256_333673a7a898804683c96608009f90acfb f8f610.jpg[/img]
2007 4.6L intake manifold hole
I'm pretty sure I understand what happened because it started with damage to the coolant Parts allowing coolant into the intake and into the spark plug holes which cause misfires and backfires which I believe is what damage the intake itself but the damage was already there and the intake was going to be replaced anyways.
When I originally pulled codes I got one for the map sensor, which if you know these trucks that can lead you down a wild goose chase for three or four sensors if you don't have the correct tools and a code reader with a live data to verify what's up and I didn't have either at the time.
When it cut out of me it wouldn't make a grade I disconnected the maf sensor and I drove another hundred miles before I ended up pulling the alternator after replacing the maf and saw this which suddenly everything made sense and I replaced my intake right then and there.
What blows me away was this truck was still able to do 55 mph down the highway with a hole in the intake like this with the maf disconnected.
Fuel my drop to 5 miles a gallon and idle consumption increased to about 2 gallons per hour or more.
But the truck was still running and driving.
[img alt="2007 4.6L intake manifold hole
"]https://cimg4.ibsrv.net/gimg/www.f150forum.com-vbulletin/2000x1504/20250212_112256_333673a7a898804683c96608009f90acfb f8f610.jpg[/img]
2007 4.6L intake manifold hole
Last edited by Lstevens; Feb 14, 2025 at 05:14 PM.
Thread Starter
Joined: Feb 2025
Posts: 7
Likes: 0
Yes and it appears as a link at the bottom of the post. I uploaded it and I attached it correctly it just doesn't showing at least on my phone but it shows the link to look at the picture.
The picture was taken after I took the alternator off because I was getting ready to pull the intake to do the gaskets and inspect it anyways.
The picture was taken after I took the alternator off because I was getting ready to pull the intake to do the gaskets and inspect it anyways.
