Injector issue?
Hey all- first time poster here. I have a 75 Bronco, with a 351W and Fitech Gostreet 400. Running Pertronix DIstro & Coil for ignition. When I first installed it ran pretty good- couldn't ever get the hesitation to go away when I mashed the throttle but otherwise it ran pretty good.
My in tank pump failed about 4 weeks ago so I pulled the tank & replaced it. It ran fine, I even did a little tuning that day because I noticed the IAC steps were a bit off. Parked for 2 days.
Woke up to head to the airport and it was super hard to start. Driving to the airport it was acting like it was missing a cylinder, had a vacuum leak, something- low power, and wasn't great. Parked at airport for 3 days. Came home and BARELY got it to start.
Drove about halfway home and it just gave out. Had to tow it though I did manage to get it back into the garage under it's own power. It would run a little, but just wouldn't move. Have not been able to get it to start and idle since.
Been through RPM noise, Sent data logs to Fitech, shielded wires, replaced coil, everything between the facebook forums and Fitech- still won't start. I can get her to fire with starting fluid and run for about 2 seconds, then she dies. No fault codes anywhere. I have 12 volts at the coil, & spark.
Finally crawled up in the engine bay and took this video. I'm guessing here totally but I think I'm running on maybe 1 injector. Totally frustrated here. Fitech is sending new injectors, but I'm looking for ideas and other help here- or at least validation that the injectors might be the issue. Thanks all!
Immediately what comes to my mind is that your battery isn't fully charged. EFI systems are real sensitive to not having good voltage during cranking of the engine. Check your voltage at the white and red fitech input power wires while cranking the engine over. I've found if it doesn't read at least 10 volts during cranking, it won't initialize right and have all the symptoms your talking about. Oh, and one other thing, I had to take all my plugs out and clean them before trying it again, because they were fouled.
Thanks- did check all plugs and they are good. Battery is pushing 12 volts, lowest rate I got at the wire was 11.3 after cranking for some time. Thought the battery might be a culprit- even had it tested and charged.
you got 11.3 WHILE cranking right?
I had a similar issue. It turned out that the electrical connector to the fuel pump didn't click into place so it wasn't locked and the connection became intermittent. Do you have a fuel pressure gauge?