Cel
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Joined: Oct 2003
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Cel
CEL came on and off a couple times in the last few weeks, so I took the truck to autozone and did the scan. Only thing that came up was 401 egr valve. So of course I replaced the egr valve and then disconnected the negative battery terminal for 15 or 20 minutes to reset the computer. Low and behold the next day the light camer back on. At idle the truck seems to have an intermittent miss. Any ideas?????? 97F150 4.6L 4x4
New User
Joined: Mar 2004
Posts: 8
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From: Owensboro
just a guess but if none of that works sounds like it could be plugs or wires i got a good tip to see if plug wires are jumping across get it really dark and let truck idle and look! no spark no jump does it do it worse when u take off or does it jump when u r cruising?
Senior User
Joined: Nov 2003
Posts: 263
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From: Royal Palm Beach, Fl
Clogged EGR Ports
There are several reasons this code can appear. I just fixed my 98 F150 4.6 L 112,000 Miles with the same code. It turned out to be the EGR Ports were clogged with carbon. Disconnect the vacuum hose from the ERG Valve and cap it. Then apply vacuum (outside source) to the ERG Valve while the engine is idling. If it continues to run smoothly the ports are blocked. The engine should stumble or stall if the ports are clear. To clean them you will have to remove the throat from the manifold. The EGR Valve or the PDFE Switch could also be the problem.
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jdr37
1987 - 1996 F150 & Larger F-Series Trucks
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Nov 7, 2014 08:00 AM
