Compression Ignition Addict
Join Date: Dec 2007
Location: Stewartsville, NJ
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94 7.3 tried to change tune and no start
Hopefully someone has some insight for me. I was leaving work today and started the truck to let it warm up. It ran for about 20 min and has been running with no issues. I decided to shut it off and change my tune to the tow tune, because I plan on towing my camper for the first time in a few days. I just use a Edge Evolution tuner and had in on the street setting but didn't want to tow with that until I got my gauges installed.
Well I went thru the process and when done the wait to start light and CEL were kinda blinking and I could here a clicking noise. Wait to start never went out and the truck just cranked, so I figured the tune didn't take ad I did it again. Same result. So I tried to return to stock. Still the same, but when I tried to tune again it acted as if it was first being installed (like the tuner had returned it to stock). Thought maybe low battery, so I thru a jump box on it. Same. Finally found the clicking was from the power dist box and was Relay 2 (fuel pump). Tried swapping another relay, still clicking. Is it a coincidence and my fuel pump went or is it a tuner issue. Of the many times I tried changing the tune, sometimes it would connect and other times it wouldn't recognize the key on and would give a communication error.
The lift pump was replaced recently and the truck has been running great.
I had to get a ride home and leave it at work...open to any help, it's my daily driver, so I have to get it going.
1994.5 Ford F350 CCLB, 7.3 with only 135k, 5spd. For now all stock except for a S&B CAI and a Diamond Eye 4" from the turbo back, 305/70/16 BFG A/T's on 16x12 MT Classic II,tonneau cover and added 3rd fuel tank/toolbox combo for an extra 48 gals