answersLogoWhite

0


Best Answer

A vacuum leak,

A plugged fuel filter,

A faulty fuel pump or fuel pressure regulator,

User Avatar

Wiki User

βˆ™ 10y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What would make a 1999 ford ranger run lean?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

Why does my 1994 ford ranger front wheels lean inward?

The front wheels on a 1994 Ford Ranger lean inward due to the camber of the steering alignment. Adjustments can be made at a local tire shop.


2003 ford ranger system to lean bank 1 how to fix?

what does system to Lean Bank 1 on 740iL 2001 means


Can you use ethanol in your gas tank of your 1999 Ford Ranger?

( IF YOU HAVE THE 3.0 L FFV ENGINE ) ! - you can use E85 ethanol / regular unleaded 87 octane / or any combination of the 2 fuels i have a 99 ford ranger 3.0 five speed manual ffv engine and it will not run e85 at all it runs it to lean.


What does P1131 mean on a 1999 ranger?

Trouble code P1131 means: Lack Of HO2S11 Switches - Sensor Indicates Lean


What does System fuel too lean bank 1 mean on a Ford Taurus?

1999 Ford Taurus. System Adaptive fuel too lean banks 1 and 2. How can I fix these.


If the old plugs in a 2001 Ford Ranger 4.0L were white does this indicate a head gasket leak or another problem?

No it would indicate maybe a lean mixture in the fuel but no major problems


What does po171 mean for 1999 ford f150?

system to lean bank one 02 sensor ?


What is obd code p1131 in ford ranger?

Trouble code P1131 means: Lack Of HO2S11 Switches - Sensor Indicates Lean


What causes trouble code P0171 on a 2003 ford ranger 4.0?

P0171 is System Too Lean (Bank 1), which means that the oxygen sensor detected an excessively lean air fuel mixture.


What might cause a 1998 Ford Ranger to run lean?

It is not getting enough fuel for complete engine combustion. Check the fuel injection system.


What does the trouble code System too Lean Bank 1 mean for a 1999 Ford F150?

check the maf sensor


How do you fix trouble code P0171 on a 1997 ford ranger?

Trouble code P0171 means: Fuel System Too Lean (Cylinder Bank 1)