Car Information:
Kia/Sedona
Year: 2003
Engine Size: 3.5L
Trans: Automatic

Issue / Question:
My car starts fine when cold. Once it warms up, if I go to start it, it cranks and then locks. When I key off and then on it cranks and then locks or cranks without starting. The car does a fast crank with a hint of starting but never does. I let it cool and it becomes hit and miss but usually starts. Once started, the car drives fine. There are no misses, acceleration is good, and the idle state is good. I disconnected the output on the fuel pump and it appears to be ok. The fuel flows when cranking (Done when cold). Any ideas?

Answer:
The crank and lock scenario may mean the engine is hydro locking from fuel or coolant (not a good thing)! If you’re not loosing coolant it may be a bad fuel injector allowing fuel to enter a cylinder while the engine is turned off and when you go to restart it has to chase the excessive fuel out of the exhaust valve before the engine cranks over normally. Let us know if you want to get it in for us to check. Continued use may bend a connecting rod if the condition isn’t resolved.

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