Blowback?
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Junior User
Joined: Feb 2004
Posts: 58
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From: Houston Area TX
Blowback?
I have a 93 F150 5.0 EFI supercab w/AOD. It's got almost 200,000 miles on it and it runs great, except.....
...when I lift off the throttle after accelerating or even cruising at speed, the engine revs down, just like a manual downshifting, and it's just as loud as when I'm accelerating. I can actually feel the truck losing power when it does this. Is this just a timing problem or is blowback from the exhaust? There are no leaks in the exhaust that I can find.:-fire
...when I lift off the throttle after accelerating or even cruising at speed, the engine revs down, just like a manual downshifting, and it's just as loud as when I'm accelerating. I can actually feel the truck losing power when it does this. Is this just a timing problem or is blowback from the exhaust? There are no leaks in the exhaust that I can find.:-fire
Senior User
Joined: Oct 2003
Posts: 100
Likes: 0
From: new jersey
definitly check your pcv valve and the hose to the valve..also is there alot of oil in the filter box. there is a small filter in the box you might wanna check that one to..i have an 87 f150 with almost 300k on it. its all org (eng an trans ) it has a small amount of blow by into the air filter box. about every 10k i have to replace that small filter ..no biggy, truck runs like achamp !
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