Been chasing some running rich codes for over a year now, finally determined the problem is Flex fuel injectors instead of the regular ones. Only problem is we still can't determine if the fuel injectors we're trying to buy are the right ones. None of the part websites even RockAuto seem to differentiate between the regular and Flex. Even Napa gives you flex results when you specify the U vin.

Can anyone confirm what the correct part number is for a 2002 Ranger 3.0L non-flex fuel is?

The ones we bought and now are uncertain about are Standard #4L5E-CA 9F593
https://www.oreillyauto.com/detail/c...injector&pos=0

 

Gas only used 14 pound/hour injectors
Flex used 25lb/hr early on and then 21lb/hour after 1998 or so

Not sure why they would list it working on BOTH 3.0l gas only and flex
Maybe Ford changed the computer software so both could use the 21lb/hr

It was just a "math issue", computer is programmed for fuel pressure AND injector LBS, i.e. how much fuel is released at XX pressure, thru XX size holes(injectors) in XXX milliseconds

"Fitment" can also be misleading, it can mean Yes, connector will fit and its the same length so will seal in the intake and fuel rail, but doesn't mean the LB/HR is correct

These have the flow rate of 13.5lb/hr(14) : https://www.fiveomotorsport.com/2001...rd-ranger-gas/

Used Part numbers: 1L5E-C4A, and 1L5E-C4B

 

Awesome! Thank you! That one has the same part number as what we bought but were unsure of. Matches number on the part Ford shows too
https://parts.ford.com/shop/en/us/fu...tion-7811339-1

Hopefully this will help someone else facing the same issue.