Mechanics

3.0L V6 4X4...APRIL 2011, MISFIRING CYLINDER #5, REPLACED PLUG, COIL PK AND DPFE, RAN GREAT FOR 8 MONTHS, #4 CYLINDER STARTED MISFIRING, LOST POWER...SAME THING THAT HAPPENED BACK IN APRIL, CHANGED ALL PLUGS, DPFE, ERG VALVE, IAC...I

2001 Ford Escape • 24,700 miles

2001 Ford Escape 3.0L v6 4x4. April 2011, misfiring cylinder #5, Ford replaced plug, coil pk and DPFE, ran great for 8 months, #4 cylinder started misfiring, lost power. Same thing that happened back in April, changed all plugs, DPFE, ERG valve, IAC. Idles great but can't rev over 2500 rpms. Sounds like it is flooding out was told it is starving for air or bad vacumm. The brakes are affected as well. Checked for bad vacumm hoses, found none. Each part that I replaced made it run a little beter but problem isn't solved. What could it be?
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Ac2112
December 26, 2011.




Bad cat converter. It may be bad from all the missfires. Have a vacuum test to confirm.

Roy
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ASEMaster6371
Dec 26, 2011.
How can you check the cat converter?

Tiny
Ac2112
Dec 26, 2011.
Do a snap throttle test with a vacuum gauge.

Roy

ASEMaster6371
Dec 26, 2011.
Check the oil seperator on to of engine, Where PCV valveis. Check hose for oil in it.

Tiny
PeteyPete36
Mar 14, 2012.

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