Buick Repair Questions? Ask a Mechanic for Answers ASAP
Hi, I’m Ron and I’ll be helping you today.
Before we get started though,Please understand that I don't know your skill level or tools you have to assist us. Also understand that I can't see,smell, hear, or touch the vehicle either, so patience is appreciated.
My goal is to make you happy and get a great rating in return for my time.Sometimes I have to give you bad news that I know you didn’t want to hear, so please don’t shoot the messenger.
This can be caused by the fuel pump losing it's prime to the fuel rail, so when you try the second time the rail is now charged with fuel. This is caused by a leaky check valve on the pump or leaky fuel injectors.
It's not that the pressure is low, it's that there is not enough fuel in the rail on that first turn of the key. I've seen this many times and it is hard to find unless it's done on a cold engine and on the first turn of the key.
Thanks again, and please don't forget to rate me and keep this link in case you need me again later on.
You're welcome, thank you too, but you can easily test the injectors with a leak down tester instead of replacing them, just to be sure.
Thanks again, Ron