car not starting unless plug is removed

Asked by May 06, 2016 at 02:27 AM about the 2002 Ford Explorer XLT 4WD

Question type: Maintenance & Repair

2002 ford explorer 4.6 won't start unless a
spark plug is removed. Coolant busted out
up from behind engine. Started running
terrible now it won't run unless a spark plug
is removed. Why will it only run while a plug
is removed?

4 Answers

49,425

Blown head gasket, the cylinder is filling up with coolant causing a hydrolock. Coolant is liquid and non-compressable. I'll bet it is losing coolant also.

1 of 1 people found this helpful.

That'll be the next thing I check

And it will run when I remove the egr valve. As long as there's somewhere else for air to go, it'll run. No more than 2k rpm though.

Nothing wrong with the oil. Wouldn't it be milky looking or something in it?

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