mystery glitch
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mystery glitch
After months of trouble free starts on my 92 F250 7.3,(new glow plugs/relay in December), it left me stranded after a 30mile trip. It sat for approx. 2 hours after getting there, and cranked strong but would not fire. My mechanical abilities are limited so the only thing I could think of was to purge the fuel filter. Didn't work. Let it sit for approx. 4-5hrs. after that and figured I would try it again. It sputtered a bit then fired up. No problems for 3 days normal use then did it again, this time after sitting all day, then driven across town. Left it overnight, started next morning. Mechanic says glow plug system tests ok, possibly fuel pump solenoid, but not sure because tested all day and could not make it fail. Now I am paranoid about taking my truck anywhere. Should I throw a solenoid at it and hope that was the problem? Any other suggestions?
Posting Guru
Joined: Sep 2002
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From: Northeastern Pa - USA
mystery glitch
Could you explain just how the truck acts when it does act up and you get it started?? Does it run rough? What color is the smoke when it starts? Can you hear the glow plug solenoid clicking after a while before cranking? Have you changed the filter recently and then had this problem?
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mystery glitch
Both times is sputtered for 2 seconds max, then ran smooth. There was the normal puff of white from the tailpipe, nothing excessive. I haven't changed the fuel filter recently but I did open the drain on it thinking maybe water or ? The glow plugs seem to act normally continuing to click for about 15-20 seconds after start.
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mystery glitch
I was interested in hearing about your problem because I have a '91 7.3 L 1 ton cube van and I am experiencing the same problem. Starts great when cold, it runs great when it's hot and it restarts great when it's hot (meaning I can shut it down for 10 to 20 minutes and it will start back up again with no problem). But when hot and I turn it off for 30 to 45 minutes, it won't start again for one to two hours. It's almost like it has to cool down or something. It cranks normally, glow plugs and the glow plug controller are fine. Sometimes if I crack an injector line and crank it until fuel starts spitting it will start but not always. I talked to a fuel injection specialist and he said this problem is common on this model and is referred to as "Parking Lot" syndrome. He said he could install a new injector pump but would not guarantee that my problem would be solved and he did not offer any other advise. Thanks for listening and I will eagerly wait to hear responses for Mystery Glitch I & Mystery Glitch II. 
Mountain Pass
Joined: Apr 2003
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mystery glitch
I have an 86 6.9,had that same kind of problem for a while,found out it was getting air in the lines because of a hole in the tube into the fuel tank that was corroded from water in the tank,when it would get so far down on fuel in the tank,it would suck air into the system at times,just a thought for you to check into
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