Tahoe 2007 starts rough and smells like gasoline

[DJPoertsch]

Good morning dear friends from the forum.
I wanted to talk to you about whether my assumption was correct. My Tahoe 2007 with currently 424800 km starts very unsteadily after standing for a long time and then smells like petrol. It only runs for about 5 -10 seconds and then it's quiet. No problems even while driving. No check engine light on.
I now suspect that an injector is leaking and that's why I have a rough start and also the smell of gasoline. Can you confirm this or is there perhaps another issue? I would be happy if we could narrow down the issue together.

Best Regards from Germany

Markus

 

[mikez71]

That would also be my guess..

 

[rdezs]

Before diving into the injectors and whatnot, pull your EVAP purge solenoid off the intake manifold... If you can blow air through it, it's stuck open and flooding your intake with fuel vapor creating an overly rich mixture. At your mileage, I'd go ahead and just replace it, they're not expensive.

 

[07burban88]

this is true when ignition off purge valve should be closed

 

[LsHart]

I read this and thought of I am gasoline Kicking Harold.

 

[DJPoertsch]

Thank you for all the feedback. Today I'm in the car repair shop and will check everything. Since I have technical inspection service here in Germany next week, it is a good idea to check the things at the same time. I will give you feedback when I know something about it. Thank you

 

[dkad260]

How many miles on the plugs? Are they OE AC Delco or aftermarket?

 

[goldpack]

you can also get some dye. similar to the dye they use for HVAC and coolant.

it would be labeled for oils, fuels, brake fluid. putting a little bit into the fuel tank may show a physical leak on the incoming line.
and with gasoline ...little drips dissipate so fast all you get is a smell and nothing to find. ...so the florescent dye will pop up fast.

..used the same 10oz bottle for 20 years as I use so little. ...but great at finding which rubber or steel line is rusted or loose....vs. all the others that only look bad.