Odd missfire/exhaust problem
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Odd missfire/exhaust problem
I have a 1983 F-150 with a 300 i6 carbed. The previous owner did a hack job on the egr plate and the air pump so no emissions stuff was working. The truck ran OK but had a very small "misfire" every few seconds. Also had a loud exhaust leak.
Today i tore it apart and put a new intake/exhaust gasket. Since the EGR stuff was blocked off anyways i removed the spacer under the carb and just mounted the carb directly to the manifold.
She started right up and I readjusted timing and idle.
It idles faster than it should and It has a constant misfire that i cant get rid of. Also there is exhaust gas coming out near the bottom of the carb
. It gets worse when i open the throttle. It also has white smoke out of the exaust now and some of it is coming out of the bottom of the carb. Any idea how exhaust could be getting up to the carb? Could one of the valves be stuck open?
Today i tore it apart and put a new intake/exhaust gasket. Since the EGR stuff was blocked off anyways i removed the spacer under the carb and just mounted the carb directly to the manifold.
She started right up and I readjusted timing and idle.
It idles faster than it should and It has a constant misfire that i cant get rid of. Also there is exhaust gas coming out near the bottom of the carb
. It gets worse when i open the throttle. It also has white smoke out of the exaust now and some of it is coming out of the bottom of the carb. Any idea how exhaust could be getting up to the carb? Could one of the valves be stuck open?
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