what causes a 5.3 litre flex fuel engine hard to start in warm weather or after engine is warm from running?
It takes 2 full ingition turn overs to start the engine. Then runs fine. In cold weather it starts right up. I noticed the problem after I stopped using E 85 flex fuel and began regular fuel. It has been on regular fuel for several months now.
you may want to have your fuel pressure regulator checked- you shouldn't have to crank it over twice to start the truck with fuel injection.
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