2001 Ford Explorer Engine Light - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

John Explorer · 10-18-2009, 19:03

I replaced bank 1 and rear bank 2 oxygen sensors.light came back .Changed maf sensor $130.00 car starts to idle rough in rhythm at exactly 30,000 rpms. Can anybody tell me what I change next. Diagnostic?Clean fuel injectors.HELP! Thank You!

**Bert** · 10-18-2009, 19:25

Have you chaecked for OBD codes? If it shows a missfire, it's probably the coil pack. They're known to breakdown.

brianmurrah · 10-18-2009, 20:37

Never seen a Ford engine run at 30,000 RPM but I would suggest changing the coilpacks on the motor.

John Explorer · 10-19-2009, 18:56

Hey Brian and RTG. Thanks for the tips. Meant to write 3,000 rpms! Changed the coil pack ,not the problem. Car is running lean. Auotzone diagnostic said o-sensor, maf,fuel injectors,vacuum leak are all possibilities. Now I,m down to loose wires ,vacuum leak,fuel injectors. The car drives well.I use it everyday ,it just won't pass smog. I have 200 dollars in. Diagnostic will be another 125.00. I think I'm close . How do I clean the fuel injectors? Thanks for your help.

**Bert** · 10-19-2009, 19:53

Try cleaning the MAF. There's a special cleaner for that. They pick upi debri at times and can also trigger other codes.

John Explorer · 10-20-2009, 05:25

I changed the maf ,2 sensors and I tried a new coil pack. I'm taking that back ,it is not the problem.Also my brake light keeps coming on,goes off sometimes going uphill. I also have a door chime that intermittantly goes off when I'm driving. Thanks

**Bert** · 10-20-2009, 08:18

There's a switch in the master cylinder that lets you know it's low on brake fluid. The switch may be bad or very sensitive and topping the fluid may help.
Does the seatbelt light come on with the chime? It may be the seatbelt lswitch in the buckle.

Kidder · 10-21-2009, 00:06

Is the engine light on? Is this a V8? Is the idle rough - like a misfire?