Engine hesitating
#1
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Location: Kansas City
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Engine hesitating
I have a '86 F-150 straight 6 carb. motor. My problem is the engine keeps
hesitating. I've changed plugs, wires, cap, rotor, fuel filter, all my fluids are
topped off, I sprayed the carb. with cleaner, change air filter and put
Sea-foam down it. It drives on the highway fine but if I stop, the engine idol
slows down and kills itself time to time. Does anybody have an Idea what I
can check? Thx.
hesitating. I've changed plugs, wires, cap, rotor, fuel filter, all my fluids are
topped off, I sprayed the carb. with cleaner, change air filter and put
Sea-foam down it. It drives on the highway fine but if I stop, the engine idol
slows down and kills itself time to time. Does anybody have an Idea what I
can check? Thx.
#3
Thats my guess, Especially if it Just started happening.
Also you might check Ignition timing.
To check for vacuum leaks, Use a can of carb cleaner and lightly mist all the visible vacuum lines and fittings(staying clear of exhaust manifolds of course) and see if the idle speed changes when you spray a fitting. If it does, then there's your leak!
A safer alternative is to use a mechanics stethescope with the steel rod removed , Just use the rubber tube, You can hear alot of stuff with the scope!
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Figured it out this weekend and had a guy put a vacuum gauge on it and it
boiled down to the EGR valve wasn't opening. Replaced it and it started
running normal again. Thx for your help and insight.
boiled down to the EGR valve wasn't opening. Replaced it and it started
running normal again. Thx for your help and insight.