I have a 2011 GMC Sierra Denali 6.2 L9H motor. Currently when I go to turn it on every morning it starts like a charm but when it gets warm/up to running conditions it the truck struggles to start. I was thinking the fuel pump is going out but the truck starts every morning? We did a fuel pressure test and it has no pressure when we performed it when it was key on position. We did that yesterday but today the truck started if it did have fuel pressure. Please help
What do your fuel trims look like? Hot starting problems can be caused by drippy fuel injectors making the mixture too rich. (A rich mixture is needed when starting a cold engine.)
I have not checked fuel trim levels. This is the first time ever messing with injectors, can I have a shop check the injectors and clean/replace the faulty ones?
If you know a good shop they should be able to do it but bear in mind that may or may not be the problem. There are other issues that can cause hot starting problems.