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Matt
Matt, Engineer
Category: Ford
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Experience:  BEng hons Mech engineering, in auto industry 22 years
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I have a 1986 ford bronco and it started jerking /stuttering

Customer Question

I have a 1986 ford bronco and it started jerking /stuttering when I go up a hill and when I'm on a straight it jerks when I press on the gas I was sitting at a light and it cut off and won't start back up it has cut off before but it always turns back on can you tell me what is wrong with my truck
Submitted: 1 year ago.
Category: Ford
Expert:  Matt replied 1 year ago.

Hello

this sounds like a lack of fuel and could be a lack of fuel pressure from the electrical pump at the tank.

If the connections to the pump are corroded or damaged then the pump could stop at any time or could not be running at full speed. Check that its relay switches in and out and the relay contacts are clean and bright – replace the relay if in any doubt and do the same for the fuse,

Ideally measure the pressure at the inlet to the carb (should be 3 -4 psi) and if this is low check the pump as described and also consider changing the fuel filter as if this partially blocked this too will reduce pressure.

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if this is OK then I'd consider removing the carb and stripping it down to clean it and you may have a clogged air jet or gallery

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