Hopelessly-Devoted
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- Joined
- Sep 21, 2021
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I'm just come right out and ask, has anyone ever successfully installed a Sniper EFI (550-516) in a 94 or 95 with a 5.0? I also have a Terminator X still in the box that turned out to be a disappointment. That's a discussion for later. In a nutshell here is where I am at and hope someone can help me out:
1. I think I fried the touch screen, so I need to get a replacement. Worked with some people on the Holley forum to test it, pretty sure it's gone.
2. I essentially removed all of the wires to old ECM, leaving only the ones needed (oil pressure, VSS etc.).
3. Now when I turn the ignition to "run" the cooling fan turns on. Turn the ignition off, fan goes off. It should be temp controlled, right? Obviously, I missed a wire someplace (whether it's a connection or a cut).
4. This what I think fried the touch screen. Dark green/yellow wire, according to the schematic, comes from the inertia switch/fuel pump relay. Light blue/orange comes off the CCM next to the overflow tank. Large blue wire from Sniper is used to connect to the fuel pump wiring.
a. Large blue wire to light blue/orange, no fuel pump
b. Large blue with to dark green/yellow, no fuel pump
c. Large blue wire to dark green/yellow and light blue/orange, fuel pump works.
d. Like to cooling fan, the pump does not shut off after primping the system when ignition is set to run.
O2 sensor is installed and connected. The 10 pin connector has no connections to it for the fan, A/C cutoff and so on. I am running a Holley HyperSpark distributor (hoping to make my life easier) with a steel gear installed.
Touch screen was powering on up to the point where I got fuel pump working, the O2 and the HyperSpark installed. Like I said, my money is on the fuel pump wiring.
I was going to run the wizard to get things set up when I discovered the DOA touch screen.
I have other questions about the wiring, but need to get back to square one and get the touch screen working.
. .
Thanks in advance
1. I think I fried the touch screen, so I need to get a replacement. Worked with some people on the Holley forum to test it, pretty sure it's gone.
2. I essentially removed all of the wires to old ECM, leaving only the ones needed (oil pressure, VSS etc.).
3. Now when I turn the ignition to "run" the cooling fan turns on. Turn the ignition off, fan goes off. It should be temp controlled, right? Obviously, I missed a wire someplace (whether it's a connection or a cut).
4. This what I think fried the touch screen. Dark green/yellow wire, according to the schematic, comes from the inertia switch/fuel pump relay. Light blue/orange comes off the CCM next to the overflow tank. Large blue wire from Sniper is used to connect to the fuel pump wiring.
a. Large blue wire to light blue/orange, no fuel pump
b. Large blue with to dark green/yellow, no fuel pump
c. Large blue wire to dark green/yellow and light blue/orange, fuel pump works.
d. Like to cooling fan, the pump does not shut off after primping the system when ignition is set to run.
O2 sensor is installed and connected. The 10 pin connector has no connections to it for the fan, A/C cutoff and so on. I am running a Holley HyperSpark distributor (hoping to make my life easier) with a steel gear installed.
Touch screen was powering on up to the point where I got fuel pump working, the O2 and the HyperSpark installed. Like I said, my money is on the fuel pump wiring.
I was going to run the wizard to get things set up when I discovered the DOA touch screen.
I have other questions about the wiring, but need to get back to square one and get the touch screen working.
. .
Thanks in advance