Thread: Big time off topic
06-27-2008, 04:22 PM #1
Big time off topic
I have a 2001 4.2 V6 Ford E-150 Work van my service eng. lite came on the code is P0401 (EGR Flow Insufficient) I replaced the EGR and now I get Code P0401 and P0301 (Cylinder 1 Misfire Detected) I also put new plugs & wires on Can anyone help me Thank You Neal
06-27-2008, 06:10 PM #2
- Join Date
- Aug 2006
- Homer Glen Il.
pm casey67 he can help you
06-27-2008, 06:58 PM #3
Dude you need a DPFE, it's the part that tells the pcm that the EGR valve is working. The DPFE fails oftern, they have made an updated part for it. Check the DPFE hose too, they are the ones that run from the egr pipe to the DPFE. It will cause a p0401 everytime.
Is the missfire still there, after you replace the plugs and wires? If so check the coil, spray it down with water and see if it sparks outside of the coil. If that is still there, it is possible that the injectors could be plugged, but that is not very likely. LMK what you find out.
06-27-2008, 07:24 PM #4
Tim is correct.P0401 is the DPFE usually,you need to apply vacuum to the EGR valve to see if the engine stalls or nearly stalls(idles low and rough)if not thr EGR gases are not flowing through the intake manifold.
If it runs rough all the time,I've seen the coil pack go bad.
If the missfire is intermitent,check for a crack on the outside of the coil as Tim said.
If it missfires when you come to a stop after driving on the highway,the EGR passages plug up with carbon(behind the EGR valve is a large passage,at each cylinder,has a smaller passage ),usually the rear cylinders plug up,then the egr gases flow into the 1 or 2 open passages(like cylinder #1)causing a missfire
Last edited by casey67; 06-27-2008 at 07:27 PM.
06-28-2008, 12:05 AM #5
Nice to see some Ford guys on here!!
Ok guys, whats the easiest way to change the a/c hose assembly attached to the compressor on a 98 E250. The comp. is down low just above the cross member and bolts on top of the comp.
The serpentine belt started to fall apart and cut the discharge hose in two. Been w/o air for 2 wks., and it sux being w/o air here in the desert!
I guess I should mention it has the 5.4 liter.
Sorry for the high jack, but I need some a/c!
Last edited by starflight; 06-28-2008 at 12:15 AM.
06-28-2008, 12:56 AM #6
06-28-2008, 08:20 AM #7
Check your pm I sent you some instructions.
06-28-2008, 09:12 AM #8
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