- Mar 25, 2012
- 177
I had my head just replaced at the dealership under warranty about two weeks ago due to a burnt valve. My OE battery died shortly after this, and have a brand new one now. The truck cranks just fine, and starts every time but....
.... After it cranks a couple times it's doesn't always smoothly catch and start to run every time. On random cold starts only, it will crank a couple times(3-4 as usual) when it starts to fire, it sounds like its fuel starved and then surges on ( like whoooosh) and begins to run but feels like it has a few random hesitations until the air injection pump kicks on and everything smooths right out. It could be just paranoia on the hesitation feeling since I just went through a head replacement nightmare, cylinder 6 misfire with burnt valves and those misses were obvious at idle.
However, these odd starts did happen a few times randomly before my whole head situation occurred, but they seem to be more frequent now.
Other side notes:
* new battery / new air filter/ cleaned TB.
* truck runs perfect with no problems after cold start ups.
* after air injector kicks on, ghost hesitations seem to disappear on these odd cold starts
* letting truck sit in on position to prime fuel pump doesn't seem to affect this, will start waiting timed increments instead of guessing to see if it's the fuel pump.
* checked intake manifold bolts for tightness, all easily accessible bolts were tight.
* this does not always happen on a cold start, this afternoon it was in the 70's and fired normally after sitting 10 hours, leaving work at 11pm it was 60's and sat for 5 hours and started normally again.
* dealership refilled engine with conventional oil + additives( not happy) after it was ran on synthetic for 20k+ miles when they replaced the head. Havent swapped it out yet since I was advised to wait a few miles for valve train to break in. Almost gone 1k miles, will swap back then
I tried getting a video of the fluke, but both times she started normally .... :scratches head:
.... After it cranks a couple times it's doesn't always smoothly catch and start to run every time. On random cold starts only, it will crank a couple times(3-4 as usual) when it starts to fire, it sounds like its fuel starved and then surges on ( like whoooosh) and begins to run but feels like it has a few random hesitations until the air injection pump kicks on and everything smooths right out. It could be just paranoia on the hesitation feeling since I just went through a head replacement nightmare, cylinder 6 misfire with burnt valves and those misses were obvious at idle.
However, these odd starts did happen a few times randomly before my whole head situation occurred, but they seem to be more frequent now.
Other side notes:
* new battery / new air filter/ cleaned TB.
* truck runs perfect with no problems after cold start ups.
* after air injector kicks on, ghost hesitations seem to disappear on these odd cold starts
* letting truck sit in on position to prime fuel pump doesn't seem to affect this, will start waiting timed increments instead of guessing to see if it's the fuel pump.
* checked intake manifold bolts for tightness, all easily accessible bolts were tight.
* this does not always happen on a cold start, this afternoon it was in the 70's and fired normally after sitting 10 hours, leaving work at 11pm it was 60's and sat for 5 hours and started normally again.
* dealership refilled engine with conventional oil + additives( not happy) after it was ran on synthetic for 20k+ miles when they replaced the head. Havent swapped it out yet since I was advised to wait a few miles for valve train to break in. Almost gone 1k miles, will swap back then
I tried getting a video of the fluke, but both times she started normally .... :scratches head: