I am in need of some advice/help. Here is the story.
I decided to install the Holley Sniper EFI on my 68. Car was running fine with a Holley 780 carb on an Edelbrock RPM intake with RPM heads, and a MSD Ready to Run Distributor. But not being able to leave well enough alone I purchased the Holley Sniper EFI unit which I had heard many good things about. I also purchased the Holley in tank fuel pump/sending unit. This allowed me to not have to run a return line. It's an original big block car so I was able to utilize the existing 3/8" fuel line. This is where the battle began. After draining the tank (almost full) I installed the new pump as shown in the Holley video. It went rather well I thought, so I put the gas back in & turned the key on to see if the fuel gauge was working, it didn't. I called Holley. Their advice was to switch the ground wire with the sending unit wire. This made no sense. After much testing & cursing I drained the tank again and dropped it. Pulled the pump assembly out and manually moved the float. The gauge worked, success. I reinstalled the pump, put the tank back in and added 5 gallons of gas. Turn the key on the gauge didn't work. I then gave it the Fonzie slug & to my surprise the gauge registered. Aha! The float needed to be jostled around a bit to be able to move. I then moved on to the EFI installation. This all seemed to go well. Installed the oxygen sensor but one of the provided clamps for the bung locked up & snapped off when I tried to back the nut off. I called Holley & they said they would end a new one
(I received it two weeks later!). I installed the temp sending unit, this seemed to go well, but after getting everything hooked up, I was getting a LOWErr on the CTS sensor. I called Holley. The Tech told me I probably had a bad sending unit & he would send me a new one. He also told me I could get a duplicate from Autozone which I did. Installed that & it worked great. Tried to start car, but it would turn over & and backfire. I called Holley. The tech said I may not be getting adequate Fuel pressure. I doubted this since I am using the Holley in tank fuel pump made for this system, Still to be sure I ordered a fitting & fuel gauge from Summit. After installation I confirmed that I was getting 60 lbs. of fuel pressure at the throttle body. Car still would not start. I called Holley.The tech reviewed the wiring diagram that I had used & the advised me to use the one that did not utilize the yellow wire coming off of the coil and instead hook up the purple wire from the ECU & hook it up to the gray wire out of the Distributor. I did this & car still wouldn't start. I doubled check the timing & it was correct. I called Holley again. The tech told me to increase the fuel prime level from 150 to 200. I did. Car started! Success! Not so fast. After about 5 minutes the car died. I called Holley. Explained what was going on & he seemed to think it was a loose connection somewhere in the rpm signal. I agree because when I turn the car over there is no RPM reading on the LCD screen. I have checked all connections & they seem fine. The car has started a few times & runs for a few minutes, but then dies. I am at my wits end. I think this system is beyond my capabilities. I am done with calling Holley. Hopefully my Camaro compadres have a solution. Does anyone know of a person in the Las Vegas area with Holley Sniper experience that makes automotive house calls?
PS the weather in Vegas right now is great. I should be driving my car & on top of all this it's my birthday! Any help or advice would be greatly appreciated.
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