Engine Shuts off after 30mins
All right, I need help! 2012 Hyundai Accent, automatic, direct injection.
Last week, my car jerk twice from the engine and then my rev counter shut off. Shortly after I returned from a trip to AutoZone because there was no check engine light but I hoped they could find a code anyway, when I parked my engine shut off. After waiting a few moments the car turned on just fine. The rev counter also return to normal.
The car has shut off several times, regardless of gear, but generally after at least 30 minutes of the engine running. No check engine lights have come on.
Currently it is at a shop where they are trying to diagnose it, because there are no check engine lights or codes coming from the car they are having a hard time. They said my relays look good and have no issues there, he does not necessarily think it is a sensor. He is convinced that it is is build up or deposits on the back of my intake valves.
Is anyone having a similar issue, and what did it turn out to be? We are going to try and clean the intake valves this weekend, but I was wondering if I should go ahead and replace a relay or maybe also replace some sensors as a precaution?