Lumpy idle and mild surging while driving.
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Mountain Pass
Joined: Nov 2016
Posts: 105
Likes: 2
Lumpy idle and mild surging while driving.
Truck in question is an 83 F150 inline 6. My idle is not smooth. It never has been. Dispite the fact that I rebuilt this non-feedback Carter 3 years ago. Generally the truck runs well, but now it's having symptoms of mild surging throughout the entire accelerator range. Only after reaching 120 Kms. (Canadian model) does it smooth out.
Ive had a look at the vacuum hoses and such and everything looks ok. As mentioned the carb was rebuilt, new plugs, wires, cap and rotor 25,000 klicks ago. Any ideas what I should look for to smooth my ride out?
Ive had a look at the vacuum hoses and such and everything looks ok. As mentioned the carb was rebuilt, new plugs, wires, cap and rotor 25,000 klicks ago. Any ideas what I should look for to smooth my ride out?
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Mountain Pass
Joined: Nov 2016
Posts: 105
Likes: 2
Distributor is stock. The truck only has 47,000 original KM's on it. I'm second owner. After doing some reading here on the forum I'm now thinking perhaps coil breaking down, EGR, or cracked plug ceramic. It might point to EGR because when floored, or at a high rate of speed the surging isn't there. 
Cargo Master
Joined: Jan 2019
Posts: 3,369
Likes: 16
From: Caraway, AR
Not just the egr, but the emissions system in general. Anything that runs off ported vacuum. I'd start by checking for leaks. Inspect vacuum lines and connections as well as the egr diaphragm. Do you have a vacuum tester/brake bleeder? Very handy tool and not very expensive.
FTE Legend
Joined: Nov 2015
Posts: 30,886
Likes: 4,119
From: Angier, NC
Dave ----
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