98 4.0 SOHC in a 97 Ranger 2.3L

[factory310]

Im getting a lean bank 1 and bank 2 on my 98 SOHC explorer engine. I also believe the guy who swapped this engine on my Ford Ranger did not change out the stock fuel pump on the truck. So basically I have a 98 SOHC explorer engine in a 2.3 liter ford ranger fuel tank/pump. Is the 2.3 ranger fuel pump compatible with the 98 SOHC engine ? What is the fuel pressure supposed to be comming out of the SOHC pump ? Could this be causing my lean bank 1 and bank2 codes?

Thanks

Giovanni

 

[manaen]

did you check the fuel pressure at the rails?

it is possible that the fuel pump is a lower pressure model. Depending on the type of injection system you have it could be the high pressure model (62PSI) this is the setup without the return line.

 

[410Fortune]

yes it could be responsible.
You can swap the pump for a returnless style unit or convert the 98 SOHC motor to use the 97 style fuel rail with the return style system

 

[manaen]

One other thing to point out is that if it does happen to be the return-less system there are many differences. This system has the FPR located in the tank with the pump. The Device on the rails that has a vacuum line is not a FPR it is a pulse modulator. It can be deceiving when you first look at it. Also this system only has one line coming from the tank (hence "return-less").

It is the only system (that I know of) that runs at this high 62psi pressure on the explorers. There is little in the way of documentation about this system. I had to piece together what I found from this site, and other sources.

But all this is null and void if you have the lower pressure return-less system. I think it runs at approx 40psi. Every manual references this system and you can readily find information on it.

I would start by checking the PSI