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99 Ranger SLT 4X4 with 4.0 OHV


coopab

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Joined
Aug 26, 2009
Messages
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Location
Central Massachusetts
Vehicle Year
1999
Make / Model
Ford
Engine Size
4.0 L
Transmission
Automatic
Based on what I read in the Tech Library my truck should have a DOHC motor.
Since the odometer shows in excess of 225000 miles and uses lots of oil, I'm thinking of putting a used motor in it. However, since it also has a P0171 code,
I was looking into a short term solution for poor gas mileage. Code is Bank 1 Lean.
Also from the Tech Library I saw a notation that there's a difference between the spark plugs for the OHV vs. DOHC engines. I changed the plugs and wires a few months ago and probably ordered the plugs for an OHC engine since that's what the original motor should have been.
Today while poking around I noticed a sticker on the driver's side valve cover and it seems to indicate that my motor is a used motor from a 2000 Explorer. It has the following
top line large white letters on a blue stripe.

[/IMG]
OG 948 AA
middle three lines OHV EXPL
AUTO LHD
04/17/00
bottom line says 818 plus a bar code 8180001165

All that seems to suggest that the motor came from a 2000 Explorer and is of the OHV family.

Also here's the VIN. Does that indicate what the original motor was?

[/IMG]

If it has the wrong spark plugs would that explain the P0171 lean Bank 1 code?
If I decide to go with another used motor, should it be the DOHC?

coopab
 
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