Runs perfect when it's cold 50 degrees or below. Over 50 degrees won't idle well and bogs badly when throttled up.

The foil on the bottom of the fuel tank is pretty rough. Could there be a vapor lock?

So I'm thinking of replacing the Manifold Air Pressure (MAP) sensor and the Intake Air Temp. (IAT) sensor. Will insure the wiring is good. What are the odds of the problem being something else?

When looking at the on-line OEM parts the MAP sensor seems to be referred to as a ASM sensor. What does ASM mean? Can't find a ASM sensor anywhere in the 2007 Polaris 500 Service Manuel. Am I looking at the wrong part? On-Line OEM parts Engine Fuel Injection # 10.

Appreciate your input and thanks in advance Need to get this thing running.