2003 f250
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Joined: Dec 2016
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2003 f250
Need help changed all my coils and spark plugs, about three months ago and now I have a misfire on cyclinder number six, so I changed that and still lags when stepping on the gas. Does anyone have this problem because my mechanic doesn't know the problem. Help please
Logistics Pro
Joined: Nov 2004
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Maybe a plugged catalytic converter. I also had a bad issue with ethanol in the gas in my 2006 F350 5.4l. Mechanic put in some type of heavy duty ethsnol treatment, and I started using OTC ethanol treatment in subsequent fill ups; helped alot. Local gas station sells non-ethanol gas now, so I switched to that.
Logistics Pro
Joined: Nov 2004
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I would do it for every full tank of gas, at least until the engine smooths out, then maybe every other tank.
5th Wheeling
Joined: Feb 2015
Posts: 49
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my 2001 was lacking power when i bought it. I ended up replacing all of the plugs and coils which helped. cleaned the mass air flow sensor, and replaced both oxygen sensors. what ended up being the ultimate problem was the fuel pressure regulator on the back of the manifold. I replaced that and it was a new truck. my spark knock under load disappeared and the truck will now keeping pulling over 3000 rpm.
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hillbilly_1911
1987 - 1996 F150 & Larger F-Series Trucks
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Sep 30, 2016 03:00 PM
