Re: Need More Advice: '91 F-150
On Mon, 02 May 2005 14:50:47 GMT, Big Bob
>Hello again everyone!
>My 1991 Ford F-150 with 5.0 HO is still unexpectedly and rather
>The truck will idle, and go, but as soon (auto trans btw) as you press the
>brake, the engine cuts off. It doesn't miss or anything, just shuts off
>like a light bulb.
>The advice I got here was check fuel pressure from the pump which holds
>steady as a rock at 37, which is certainly enough to make the truck run.
>I'd take this thing to the dealership to get it scanned, but it won't run
>Any other suggestions? This has been the best vehicle I have owned over
>the years, and I really need my truck to run!
>Thanks in advance for your help!
Try disconnecting and plugging the brake booster vacuum
line. If you get the same response, the brake booster is
the culprit. Your IAC may also be dirty or defective
causing it not to respond properly. Do drive the truck with
the booster vacuum hose disconnected. You won't have much
brakes. This is only a crude test to locate the cause. You
are looking for whatever has an effect on the engine that
may lead to a stall.