Question about 2005 Ford Five Hundred

2 Answers

Cranks up, stalls, rough idle, no throttle responce

No codes, Disconnect Mass Air flow goes into failsafe, Idles rough but has throttle responce.

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  • 49 Answers

Possibly the TPS....also check it for vaccum leaks

Posted on Mar 28, 2014

Can't disconnect MAF Sensor & have the car run correctly

That sensor doesn't have a fail-safe

What does the data look like on a professional scan tool?

Are there Mode $06 Cylinder Misfires?
What does Fuel Trim tell you?
What are the O2 Sensors doing?

If you install New Spark Plugs every 3 years
New Front O2 Sensors at 100,000 miles
Clean the MAF Sensor once a year
You keep track of coil misfires 3 times a year,
& replace ALL coils over 6 years old

You problems are gone.

You have to road test with scanner & wait on the
8 I/M Monitors to run clear & I like to back probe
& scope the O2 Sensors ( out ones & new ones)

You got codes in Enhanced Data,not generic on a
code reader

Posted on Mar 28, 2014

Testimonial: "No misfire codes, Bank 2 sensor 1 has heater code. Fuel trim is slighty neg. If you disconnect Mass air flow sensor,in multi diplay on dash it has the message "vehicle running in fail safe". Doesn't run correctly, but it runs, and has throttle responce. Plugs, air filter and oil changed at dealer 2 months ago."

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