Need a little direction before I start tearing Quad appart. This problem started a week or so ago. The machine starts fine, runs good, them after 10-15 min it starts to miss lose power then stall. It turns over fine but wont restart. Leave it 10 min or so and away you go! This just keeps repeating. Help please!

 

Do you hear the pump prime when you turn the key on? Plus pump must hold 39 psi without any drop in pressure. You need a fuel pressure gauge plus adapter to tie into the fuel rail. Other areas it could be is the crank sensor harness that runs by the starter. All it takes is a small bare wire to kill it. I've had to repair these and tie the harness up out of the way. Plus could be either a tps or t map sensor harness short. Look at the "sticky post" in the expert section on efi problems.Mainly talks about the 700 and 800 but includes the 500 also. Plus is it throwing any codes?

 

I will see if any codes come up. I did see the check engine sign once during this issue, so something may show.