New to me 7.3, broke down on the way home - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 04-17-2014, 08:57 AM Thread Starter Rookie
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New to me 7.3, broke down on the way home

Bought a 97 f350 with 171xxx, aftermarket injectors and hpop, built trans. I live in Laramie, WY, and I bought it from Loveland, CO. It ran flawlessly on the interstate all the way to Cheyenne, when I stopped at a gas station and the voltometer and tach stopped working. Checked the belt, didnt see anything obvious wrong, so I started it back up and got on the on ramp. Overheated before I made it off the on ramp. Looks like it pushed oil out of the fill cap on the valve cover also. I cant figure out what could have happened in that short of a time frame, I can think of either a cracked piston, water pump went bad, or maybe the crank case ventilation got clogged? I'm used to cummins engines, and I am at a loss for where to start; any advice is greatly appreciated
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post #2 of 2 Old 04-22-2014, 10:26 AM
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A tach not working is usually the result of the CPS going bad. That shouldn't affect the voltmeter, though. And that shouldn't cause overheating either.

Did it actually overheat and boil coolant out, or did it just peg the temperature gauge? Tach failure, voltmeter failure, and an erratic temperature reading indicate a dash issue to me (I'd wager on a ground connection).
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