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www.f150online.com/.../492401-1989-f150-dies-when-running-wont-st... Nov 29, 2013 - Have a 1989 F150 with 5.0 bought truck about a month ago from original owner with only 89K on it. ... Took me about an hour to do a normal 15 minute drive, died and cooled about 5 times. ... Vehicle: 2003 Ford F150 ... It was cold when I put it on and after putting it on, started and drove for about 30 minutes ...
When was the last time that the carburetor was stripped and cleaned? Also have you checked the fuel filter? Finally, the problem seems to come and go as the engine is run (and it gets hot) check that the fuel line and any electrical cables are well away from the hot engine as far as is possible.
bad need of a tuneup? like new spark plugs, ?
172 , is 02 rich/ lean warning. this one is low oxy for rich.
this code can just be a victim. for sure , with misfire.
means 02 sensor stuck at rich,
what is water temp in engine coolant, at failure? less than 150F?
could be lots of things.
leaking injectors, bad fuel.
injector sticking> causing misfire.
id use a scan tool and watch all sensor when it fails.
too high fuel pressure.
misfires cold, but only luke warm cold starts not fully cold.
just one DTC, no P0300 or 30x misfire codes, not even P0300 pendings?
I had a similar problem and it turned out to be the rubber fuel lines being old and cracked. The hoses would warm up and fuel would squirt out of the cracks. I had to replace three fuel line hoses and it has been running great ever since. Good luck.
sounds like your fuel pump is bad, it will sputter or be hard to start because there is no pressure. if it doesn't start have someone hit the fuel tank from the bottom while you try to start it, if it starts right up then you know you need a new fuel pump.