Fuel lines are the least of your worries at this point
Fuel lines are SIMPLE
You take the fittings from the 88 engine, cut them off, they are metal. You cut the metal fittings off your new 4.0L fuel lines and boil the nylon hose in water. Gas stove is the only way to go, electric will never get hot enough... I have built MANY nylon fuel lines for conversions. I use a camping stove in the garage.
ONce the fitting and nylon are hot enough you can press the hose over all three flares = factory style fuel lines
OBD-II conversion is totally possible but only needed if you want to run the 97 transmission and its an auto
If its a 5 speed then there is a much easier way to get the 97 OHV and 5 speed into your truck
What trans does the 97 have?
both trucks 4x4?
my 88 BII was 2.9L and 5 speed
I converted to 93 OHV 4.0L and 5 speed
then I converted to A4LD automatic
Then I converted to 97.5 GT40p 5.0L and 4r70w
When I went to the V8 I also went OBD-II
I still use my 1988 fuel system, dash, cruise control, etc
I am using the power distribution box from a 93 explorer
I have a OBD-ii port under my dash
I have 80 hours in my wiring harness
Here it is, the WIRING:
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Any questions?
Here is the 90% completed wiring harness.
There are a few things left to do here, I need to:
-add the plug for the canister purge solenoid
-run 3 wires to the fuel tank
-get a 97 Explorer style under dash diagnostics port and wire it up
You can see the engine harness is complete, the trans and 02 sensor harness is complete, the power distribution and truck plugs have been added and the length adjusted to fit the truck.
This is a 97 OBD-II pCM harness integrated into a 93 power distribution harness with 1988 Bronco II plugs where it interfaces with the the truck harness. Simple right?
hahaha
and thats it.....
I will not finish wrapping the harness until the truck runs, then I will remove it one more time for the final wrap.
Here you can see the extension I made, 3'-6", to re-locate the PCM to the passenger side kick panel. Each wire was cut, soldered, heat shrunk at both ends. I believe there were 84 wires total, took a
"few" hours.