Vapor lock?

[MontyQ4]

I own a 2006 Tahoe Q4, with 4.3l Mercruiser, carbureted. Sometimes, after a hard run, then sitting around for a while, I go to start the engine & the thing starts, then dies after a few seconds. Each time I start it, it starts right up, then dies. I can keep doing this over & over, but it's the same result...start/die, start/die, start/die... It will just randomly start up one time, and be just fin e. I figure maybe it's cooling, from me having the engine hatch open. Only does this sometimes. Does this sound like it could be vaporlocking?

 

[Don S]

Re: Vapor lock?

Sounds like a vapor lock. Open the engine hatch when you stop the next time to let the hot air out and see what happens.

 

[MontyQ4]

Re: Vapor lock?

Will do. Thanks.

 

[rallyart]

Re: Vapor lock?

Check to make sure you have good ventilation through the engine compartment too. If you run your blower it can help prevent vapour lock but ventilation is key.