Join Date: Jul 2012
Location: Great Falls, MT
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2001 7.3 Intermittant no-start
First time asking a technical question here. I've been lurking and learning alot over the past year or so. This is a great site with lots of info.
Forgive me if this has been answered before. I searched for the issue I'm having and only came up with a couple threads with issues similar to mine but the fix was never posted on the them.
I am intermittently having a problem with no-starts when the motor is warmed up. When I turn the key on, the WTS, CEL, and all the idiot lights on the left side of the instrument cluster stay lit (never turn off). Also, the tach jumps to 500 rpm and stays there without cranking the engine. Sometimes it will start fine when warmed. The truck starts perfectly when cool. I didn't have any starting issues this past winter.
I thought possibly CPS was going bad due to the 500rpm reading before starting so I changed that. Still won't start.
I do have a bit of oil in the IPR so I'll change that as well.
Oil and fuel filter have about 2000 miles on them.
Another thing that happens every once in a while is the truck will die randomly at varying cruise speeds. For example, it has died sitting at a stop light, slowing to stop at a stop light, and cruising at highway speeds. I have found that if the truck is moving when it dies, I can pump the fuel peddle once while still moving and it will fire back up on its own while still in gear.
Only mods I have on the truck is a SuperTunes Flashpaq running under performance setting. The tunes were installed well before I started having the dieing/no-start issues though. I've had the truck for 6 years without starting issues other than 2 failed starters. The truck has ~217K miles on it.
I'm going to pull fault codes here shortly...
Thanks in advance!