engine stutter
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Joined: Jun 2006
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engine stutter
I just bought a '94 F150 with a remanufactured 5.0L engine with about 10k miles. The engine has a little stutter or flutter when it idles. The idle is constant and smooth other than the stutter or flutter ever second or two. I first noticed it while sitting at a stoplight. I can feel it in the truck. I also now notice the same feeling from the engine upon accelleration. If I take off easy I can hear the engine stutter some. It isn't terrible as you have to listen and can barely feel it in the truck. If I take off fast I don't notice this problem, though it may still be there and just not easy to hear/feel when talking off fast.
On a different forum it was suggested I clean/replace the IAC. I cleaned the IAC but there doesn't seem to be any change.
I do have a small exhaust leak which is behind the O2 sensor and cats. It is in some flex pipe right in front of a glass pack. I would say this leak is located about half way back in the exhaust system.
I have checked the vacuum lines but can't seem to locate a leake in them at all. I have run some injector cleaner through the system.
Any help is greatly appreciated. Thanks
On a different forum it was suggested I clean/replace the IAC. I cleaned the IAC but there doesn't seem to be any change.
I do have a small exhaust leak which is behind the O2 sensor and cats. It is in some flex pipe right in front of a glass pack. I would say this leak is located about half way back in the exhaust system.
I have checked the vacuum lines but can't seem to locate a leake in them at all. I have run some injector cleaner through the system.
Any help is greatly appreciated. Thanks
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
pull codes, (www.fordfuelinjection.com) also check the timing with the spout connector removed it should be at 10* btdc. check the plug wires and routing to make sure none are touching or arcing (watch at night). your tps will usually cause the idle flux.
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