answersLogoWhite

0


Best Answer

Is the CHECK ENGINE LIGHT on? There could be any number of causes for this. Has maintenance been kept up? Start by checking the BASIC things and progress from there: like FUEL FILTER, bad vacuum lines; (cracked or off), DIRTY intake system (Mass Air sensor, air filter, throttle body etc.) A lot of things can contribute to it running rough. But you have to have a HEALTHY fuel system, spark system and intake system for smooth operation. In case you have a P0171 code "System adaptive too lean" (bank 1) then it is most likely a bad MAF sensor

User Avatar

Wiki User

15y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Why my 1999 ford ranger is running rough?
Write your answer...
Submit
Still have questions?
magnify glass
imp