Rough idle and loss of power
10

Asked by Copahkoal18 Feb 29, 2016 at 06:56 PM about the 1978 Ford F-150

Question type: Maintenance & Repair

My truck will die if i let it sit and idle for a lil
while but if i pull up to a stop sign it will
choke itself off

6 Answers
220,815

Rowefast answered 8 years ago

There is a lot more to a tune up than just plugs and wires. Did you set the proper gap on the plugs? Is there a miss?

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250

Harrydavis73 answered 8 years ago

Needs a little carb attention. Try running a can of sea foam in the gas and see if it helps. If not, the carb may need a rebuild. The ethanol in new gas is rough on the rubber parts in carbs.

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73,310

OJ answered 8 years ago

You have a 40 year old truck which sounds like it ran OK until you changed the plugs and wires. I'd check the gap on the plugs first then check the wires. If you bought very inexpensive wires, that could be one of the problems.

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34,735

lrodri911 answered 8 years ago

Check for vacuum leaks, u may have a brittled vacuum hose that u might've accidentally cracked when u did the spark plugs and make sure u gapped the spark plugs correctly

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