rough idle
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Freshman User
Joined: Sep 2004
Posts: 48
Likes: 1
From: Thunder Bay, Ontario
rough idle
My 92 E150 5L has developed a rough idle the last month or so. It is rough when cold or hot (more when cold) and drives fine when given the gas. Other than a tuneup, what could be giving these engines a rough idle or what sensors control the idle? She has 240,000 km on the engine and is well maintained. Thank you.
Fleet Mechanic
Joined: Feb 2004
Posts: 1,379
Likes: 9
From: midwest
iac-idle air control valve...it should be located near or on the throttle body and is held on by two screws...when removing try to save the gasket and clean it out....tune-up sounds like a good idea as well as a good wot run to clean out the egr
More Turbo
Joined: Jun 2004
Posts: 690
Likes: 0
From: Sweden
Also intake manifold gasket leak. Can let unmetered air in, some cylinders more than others, making it shake around, generally a high idle.
Check for vac line leaks, particularly above the passenger side exhaust manifold and the "coffe can" vac reservoir behind the starting battery.
Check for vac line leaks, particularly above the passenger side exhaust manifold and the "coffe can" vac reservoir behind the starting battery.
More Turbo
Joined: Jun 2004
Posts: 690
Likes: 0
From: Sweden
Also intake manifold gasket leak. Can let unmetered air in, some cylinders more than others, making it shake around, generally a high idle.
Check for vac line leaks, particularly above the passenger side exhaust manifold and the "coffe can" vac reservoir behind the starting battery.
Check for vac line leaks, particularly above the passenger side exhaust manifold and the "coffe can" vac reservoir behind the starting battery.
