Quote:
Originally Posted by barry123400
Well you may have presented a clue it could be valve clearance related. When the engine is cold the valve stem is at ambient temperature. After engine heats the valve stem increases length by expansion. That is why you need so much valve lash clearance to start with cold.
So if the valve is just barely sealing with not enough clearance cold. The valve will be open a little after the warm up.
Unfortunatly your doing the valve clearances 18k ago reduces that possibility. Yet it still remains a posssibility. At least the valve clearances were done in recent history compared to many examples on your car.
Back off your injector lines one at a time with the engine at operating temperature to see if you can find the cylinder. That gives you more incentive to pull the valve cover and check. You do want to establish it is an individual cylinder as it could well be something else.
Or read the milli volts at the glow plug harness with the engine started but still cold. Then when the engine is fully warmed up read them again. If it is a cylinder miss you should be able to pick it off with the comparison between the two very easily.
With your revised description I doubt it is an injector but one never knows.
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This makes sense and helps to explain the cold/hot differential in regards to missing only when warm! This weekends wrenching should yield some results, thank you!