[mxa121]

Went to the mountains for a spirited drive Sunday and thought I was not going to make it.
20 something degrees outside, initial crank was a bit extended, not much, but the car was idling badly and was vibrating more than usual.

I drove it for a bit thinking temp was the issue. It ran terrible, upon accelerating it would vibrate as if a cylinder was not firing.

I have read all about fuel pumps and how long cranks are a sign of failure, but my car restarted quickly and ran perfectly after I stopped. As I understand the long cranks would continue if it were the fuel pump, correct?

I then enjoyed a day in the mountains flogging my car through the turns and have not seen the issue pop back up again.

I am going in for service in about 300 miles for oil, headlight washer covers, battery cable, and possibly brakes.
Any ideas of what it was or if they can prevent a future occurrence of this?

thanks,
mxa

[chromisdesigns]

What you saw can be, not necessarily must be, an early warning of a failing HPFP. When our's started to go, at first we only got occasional long cranks, then after a while, it would do it every time the car sat overnight. Then I got a really long one, car finally started and ran fine. Took it in at that point and it had been throwing codes for a while, according to the dealer.

[mxa121]

Originally Posted by chromisdesigns

What you saw can be, not necessarily must be, an early warning of a failing HPFP. When our's started to go, at first we only got occasional long cranks, then after a while, it would do it every time the car sat overnight. Then I got a really long one, car finally started and ran fine. Took it in at that point and it had been throwing codes for a while, according to the dealer.

so once you took it to the dealer they replaced the fuel pump without a problem because the car had thrown internal codes?

[Hybrid For Life]

sounds like HPFP to me, they don't normally go out all at once sometimes they show some shines that seems pretty similar to yours.

Could also be your plugs

[dootlah]

Rattling wastegate.