351w Throttle Sticking!

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Mar 29, 2004 | 07:43 PM

zippylaredo

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Joined: Mar 2004

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351w Throttle Sticking!

I have a 1989 E350 with a 351w that the throttle is sticking on. (very scary

) It's not the cable or pedal assembly, so I tried lubing the springs and the throttle shaft. That made a difference for a while, but it keeps coming back.

What kind of a job is it to take this apart, or can you even get it apart? Anyone ever seen this before?

Any help is greatly appreciated! It's gonna stick at a real bad time some day, and I'll be parked in the lobby of the local wal-mart....

Mar 30, 2004 | 02:24 AM

200000+F150

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Joined: Mar 2003

Posts: 788

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From: Hendersonville, TN

If you're sure it's the throttle shaft/butterfly that's sticking, I'd say the shaft, or the bore for it, is worn out, letting the blades stick. You could drill/bush the hole, or find a good used throttle body in the junkyard. Is this a high-mileage vehicle? If so, a lower mileage one would be the fix and wouldn't take long to swap out. If you can be without it for a little bit, have a machine shop bush the shaft bore if you aren't equipped to do it yourself.

Mar 30, 2004 | 11:44 AM

loudfords

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Joined: Sep 2000

Posts: 3,862

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From: Beachville, Ontario

I had the same problem on an 88 351 EFI, usually happened when vehicle was shut off and restarted within about an hour. I swapped throttle bodies to fix the problem. BTW, if you decide to get another throttle body at the wreckers, the 302 and 351 throttle bodies are identical.