98 Yukon Randomly wont start
#1
Senior Member
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98 Yukon Randomly wont start
Tried to start it this morning. Turned over fine, but won't start. After releasing the key, the engine would complete a revolution every 2-3 seconds and then die. Started up fine in the evening. Any ideas?
#2
Senior Member
That engine is very senative to fuel pressure. I would get a test gauge and read the pressure when this occurres.
* & G Tool 33770 - Fuel Injection Pressure Tester | O'Reilly Auto Parts
* & G Tool 33770 - Fuel Injection Pressure Tester | O'Reilly Auto Parts
#3
Senior Member
True Car Nut
has to be in the mid 50'* to run, turn the key on a couple times and pressurize the system and see how long the pressure stays after you stop turning the key on. if the pressure wont stay there for a while its likely the regulator.
#4
Senior Member
True Car Nut
When is the last time you changed the fuel filter? Pull the vacuum hose off the fuel pressure regulator and smell for fuel in the hose. If you smell fuel, change the FPR. Nest step is to get your hands on a fuel pressure gage to see what fuel pressure you are getting.
#6
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Sorry for the long delay. I appreciate the info. I may not be able to check the fuel pressure for a week or so, new baby coming soon / finishing house projects. On a side note, the truck has started fine since then. My father in law told me to pound my fist on the top of the steering column if that happens? Any idea there? Again thanks. I will update with the pressure when i get a chance.
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