Rough idle
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Joined: Nov 2018
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Rough idle
Hello all! I've got a rough idle on my 88 f350 efi with the 460. Ive replaced the map sensor, fuel and air filter with no positive improvements. Any ideas? Vacuum leak? Poor fuel pump/injectors?
Fleet Mechanic
Joined: Jan 2013
Posts: 1,305
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the first step in diagnosing this would be to pull codes. buying an obd1 code reader makes this easier, but it can also be very easily done with a piece of wire or a paper clip.
i am fiscally retentive, so i choose the wire/paper clip method, but i would be the first to admit that counting flashes can be confusing and frustrating.
i am fiscally retentive, so i choose the wire/paper clip method, but i would be the first to admit that counting flashes can be confusing and frustrating.
Hotshot
Joined: Jun 2015
Posts: 12,872
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$20 for the Innova 3145 code reader. $45 for the Motorcraft MAP sensor (RockAuto). Seems to me a code reader would have been the better place to start.
The light doesn’t need to be on for the computer to have codes (active or stored) in the system.
The light doesn’t need to be on for the computer to have codes (active or stored) in the system.
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