Runs perfect when it's cold 50 degrees or below. Over 50 degrees won't idle well and bogs badly when throttled up then will backfire some. Getting progressively worse.
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.
There is no MAP listed. Polaris simply calls it an air pressure sensor #10
# 9 is the grommet it mounts in.
#11 is the screw/washer asm (assembly)
ASM = Assembly in all Polaris schematics and parts lists (a group of two or more parts sold together as one unit)
If the sensor, grommet, screw, washer etc. were all listed together as one unit it would be called a sensor Asm. (assembly)
1 3084877 Bolt, Flange 2 USAGE
2 3089901 Bracket 1 USAGE
3 3089900 Pipe, Fuel Delivery Complete 1 USAGE
4 3088135 Bolt, Flange 1 USAGE
5 3089899 O-Ring 1 USAGE
6 3089896 Grommet 1 USAGE
7 3089893 Asm., Injector 1 USAGE
8 3089894 Seal, Fuel Injector 1 USAGE
9 3089902 Grommet 1 USAGE
10 3089895 Sensor, Air Pressure 1 USAGE
11 3089904 Asm., Screw/Washer 1 USAGE
12 3089903 Clip