Engine is a 302 in an 86 F-150. It runs great above idle wether or not it is warmed up or not.
When idling while partially warmed up or completely warmed up the engine will begin to die and then surge. repeats a few cycles and dies. Does this in every gear when car is stopped. Once car is moving engine has no problems.
At a stoplight it will hesitate off idle and then run smoothly once the idle is up.
When the engine is dying and surging the voltage will drop to 12.5 and rise to 13.5. Above idle the voltage varys between 14.2-14.5. Voltage does not rise above that.
Also the air pump pulley is removed because the air pump is seized. Besides that everything is stock setup.
How can I fix this?
Recent tuneup before I purchased with motorcraft parts. The P/U then sat for a year.
When idling while partially warmed up or completely warmed up the engine will begin to die and then surge. repeats a few cycles and dies. Does this in every gear when car is stopped. Once car is moving engine has no problems.
At a stoplight it will hesitate off idle and then run smoothly once the idle is up.
When the engine is dying and surging the voltage will drop to 12.5 and rise to 13.5. Above idle the voltage varys between 14.2-14.5. Voltage does not rise above that.
Also the air pump pulley is removed because the air pump is seized. Besides that everything is stock setup.
How can I fix this?
Recent tuneup before I purchased with motorcraft parts. The P/U then sat for a year.