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Fordanswerman
Fordanswerman, Ford Motor Company Certified Tech
Category: Ford
Satisfied Customers: 3306
Experience:  Ford Engine Master/Transmission Master/Chassis Master=Ford Senior Master also Diesel 7.3/6.0
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2002 ranger: 3.0 rough idle and wants to die but runs good

Resolved Question:

2002 ranger 3.0 rough idle and wants to die but runs good while driving
Submitted: 8 years ago.
Category: Ford
Expert:  Fordanswerman replied 8 years ago.

Thanks for the question.

 

What have you done or checked so far?

 

Repair history?

 

If you keep your foot on the gas pedal, can you keep it from stalling?

 

Thanks

Customer: replied 8 years ago.
Yes if i press gas it runs good. Pulled codes P0171 and replace plugs ans Mass Air Flow sensor
Expert:  Fordanswerman replied 8 years ago.

Thanks

 

Do you still have this code after doing those things? Did you clear the memory after replacing those items?

 

Thanks

Customer: replied 8 years ago.
Ya pulled battery for 15 mins to help clear the code and comes back after 15 mins of driving. It only does it at a stop, parked , and neutral. Also while its idling I hear a hissing noise
Expert:  Fordanswerman replied 8 years ago.

Thanks

 

Yes, it sounds like you have a pretty good vacuum leak. You can use carb cleaner in a spray ca to locate the vacuum leak. If the rpms change, that is the area of the vacuum leak. Spray around the intake an in the back of the intake. Repair as needed. let me know what you find.

 

Thanks

Fordanswerman and 3 other Ford Specialists are ready to help you
Customer: replied 8 years ago.
Found the leak its the pcv elbow hose which now is the fun of finding one since autozone and advanceauto dont carry them.
Expert:  Fordanswerman replied 8 years ago.

Thanks

 

Yes, that might be a dealer only item.

 

Thanks