Mechrick
Active Member
- Joined
- Jan 10, 2020
- Messages
- 105
- Reaction score
- 68
- Points
- 28
- Location
- Las Vegas
- Vehicle Year
- 1984
- Make / Model
- Bronco II
- Transmission
- Manual
Hi all. Due to the price of fuel, I took the time to covert my BII to fuel injection over the past week. Thought I'd share the process (although there are many routes to accomplish this).
I'll miss the simplicity of the HEI and four-barrel, but I'm hoping for a 3-4 MPG bump over the 14 MPG I've been averaging. I plan to build another MS v3.0 and keep that and a spare TFI module in the vehicle for redundancy.
I picked up the early Explorer intake a few months ago and got it cleaned up and painted.
The injectors I scrounged from my junk drawer, out of a Dodge product. They are 23 lb-hr Siemens units with an ev6 connector. The harness is the original feedback carb harness that mated to a 60 pin Ford ECM. I had to make a few modifications to match the MS 1 ECU, and it's installed with a DIY MS to 60 pin adapter.
The first step was to get the engine to TDC, drain the coolant and remove the HEI and dual plane intake.
I installed the lower with Fel Pro gaskets, ditching the end rail gaskets in favor of a 1/4" silicone bead.
Reworking and cleaning up the wiring harness...
Setting the upper in to place revealed interference with the evaporator plenum. There were many ways to correct this, but since I spent a great deal of time getting the engine in it's current position I decided to mill half an inch off the intake elbow. I would have liked to have taken off more, but the EGR ports were getting thin. I may be able to mill right past the EGR ports if there is still interference under load.
I got it started, waiting on an air filter before the first test drive and tuning session. I predict it will pick up some low end torque and run much cleaner with the EFI.
I'll miss the simplicity of the HEI and four-barrel, but I'm hoping for a 3-4 MPG bump over the 14 MPG I've been averaging. I plan to build another MS v3.0 and keep that and a spare TFI module in the vehicle for redundancy.
I picked up the early Explorer intake a few months ago and got it cleaned up and painted.
The injectors I scrounged from my junk drawer, out of a Dodge product. They are 23 lb-hr Siemens units with an ev6 connector. The harness is the original feedback carb harness that mated to a 60 pin Ford ECM. I had to make a few modifications to match the MS 1 ECU, and it's installed with a DIY MS to 60 pin adapter.
The first step was to get the engine to TDC, drain the coolant and remove the HEI and dual plane intake.
I installed the lower with Fel Pro gaskets, ditching the end rail gaskets in favor of a 1/4" silicone bead.
Reworking and cleaning up the wiring harness...
Setting the upper in to place revealed interference with the evaporator plenum. There were many ways to correct this, but since I spent a great deal of time getting the engine in it's current position I decided to mill half an inch off the intake elbow. I would have liked to have taken off more, but the EGR ports were getting thin. I may be able to mill right past the EGR ports if there is still interference under load.
I got it started, waiting on an air filter before the first test drive and tuning session. I predict it will pick up some low end torque and run much cleaner with the EFI.