not sure
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not sure
I have a 1997 Ford f250 heavy duty with a 460 motor I recently had some problems as of late last fall while I was bear hunting I had my exhaust go out so I replaced that and ever since then it has been running rough I recently replaced the idler air control valve the fuel pressure regulator replace some vacuum lines put on a new cap and rotor and replace the fuel filter driving down the road it has a long shift and after a certain RPM it will smooth right out and then I get below that rpm and idles rough again any ideas
Postmaster
Joined: Sep 2010
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From: Southern Cal
Not sure what you mean with the exhaust going out? Did you have O2 sensor issues?
If just replacing a muffler if that's the case, no reason to tie that to a rough idle.
Any codes pulled yet? I'd check the plugs or plug wires if it stumbles under a certain rpm.
Sounds like some of the other things mentioned would eliminate fuel issues.
If just replacing a muffler if that's the case, no reason to tie that to a rough idle.
Any codes pulled yet? I'd check the plugs or plug wires if it stumbles under a certain rpm.
Sounds like some of the other things mentioned would eliminate fuel issues.
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sorry for that the catalytic converter went out and plugging things was all crumbled and broken off and plugging things off I replace that I also replaced the upstream side of the o2 sensor there is no downstream o2 sensor
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