Q: Difficulty starting especially on cold engine

asked by

Liam C

on August 14, 2016

Recently purchased a 1986 F-150, 4.9 inline 6 cylinder 1 barrel carburetor. Truck initially started fine. Added some seafoam and similar cleaning agents to fuel because it is an older vehicle. Truck started to die at idle and have trouble restarting, figured it was carburetor related. Replaced fuel filter and removed and cleaned carb but still same issue. Now the only way I can get it to start is rocking the truck back and forth while turning the key and pumping the throttle. Vehicle will still sometimes stall at idle, and sometimes will start without rocking when engine has reached operating temperature. Have also replaced plugs and wires, have been unable to diagnose cause of failure thus far

My car has 200000 miles.
My car has a manual transmission.

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Q: Difficulty starting especially on cold engine

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