[HR][/HR]
GREAT write-up on the TPS Adjustment procedure by Jerry, aka commanderjjones:
Short Version.....adjusting the idle voltage
(1) Find the yellow wire leading to the TPS and carefully pierce the insulation with the positive lead of your multi-meter (make sure that you seal that bare spot when finished). If you want to do it "right" and not pierce the wire insulation, you can buy the Polaris TPS adjustment harness (Polaris part # 2201519-A), which simply "T's" into the existing harness plug.
(2) Connect the negative lead of your meter to a good ground on the Ranger (the engine will work.....no need to go all the way to the battery).
(3) Set your multi-meter to the lowest setting that you have above .660 volts to get the most accurate reading (many have a 2 volt setting and that will work great).
(4) Turn the key on but do not start the engine. You should be seeing .660 volts +/- .010 volts for your '08 Crew (see the important parts sticky for info' on other year models http://www.prcforum.com/viewtopic.php?t=35 ). If the voltage is outside of that range, turn the idle voltage adjustment screw on the left front of the throttle body (right above the throttle cable) until you have the desired voltage.
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Although the screw is designed to require a special tool (Polaris part # PU-47315), it can be done with needle nose pliers. You can buy a cheaper version than the Polaris tool here http://www.kmsperformance.com/shop/item.aspx?itemid=13
(5) After the desired setting is achieved, seal and lock the screw with some thread sealant or finger nail polish to prevent it from rattling out of adjustment.
I may have a different animal. I can not find a idle voltage adjustment screw on the throttle body. I think I have a IAC idle air controller. After a $400 service and dealership tune up I continue to have a low rpm stumble and sometimes stall out. The tech said all my wiring and connections were good. The Ranger runs great except at a point just past idle on the throttle. The tech had it hooked up to their *Digital Wrench" software and set the TPS however no improvement was gained. Any ideas?
GREAT write-up on the TPS Adjustment procedure by Jerry, aka commanderjjones:
Short Version.....adjusting the idle voltage
(1) Find the yellow wire leading to the TPS and carefully pierce the insulation with the positive lead of your multi-meter (make sure that you seal that bare spot when finished). If you want to do it "right" and not pierce the wire insulation, you can buy the Polaris TPS adjustment harness (Polaris part # 2201519-A), which simply "T's" into the existing harness plug.
(2) Connect the negative lead of your meter to a good ground on the Ranger (the engine will work.....no need to go all the way to the battery).
(3) Set your multi-meter to the lowest setting that you have above .660 volts to get the most accurate reading (many have a 2 volt setting and that will work great).
(4) Turn the key on but do not start the engine. You should be seeing .660 volts +/- .010 volts for your '08 Crew (see the important parts sticky for info' on other year models http://www.prcforum.com/viewtopic.php?t=35 ). If the voltage is outside of that range, turn the idle voltage adjustment screw on the left front of the throttle body (right above the throttle cable) until you have the desired voltage.
Although the screw is designed to require a special tool (Polaris part # PU-47315), it can be done with needle nose pliers. You can buy a cheaper version than the Polaris tool here http://www.kmsperformance.com/shop/item.aspx?itemid=13
(5) After the desired setting is achieved, seal and lock the screw with some thread sealant or finger nail polish to prevent it from rattling out of adjustment.
I may have a different animal. I can not find a idle voltage adjustment screw on the throttle body. I think I have a IAC idle air controller. After a $400 service and dealership tune up I continue to have a low rpm stumble and sometimes stall out. The tech said all my wiring and connections were good. The Ranger runs great except at a point just past idle on the throttle. The tech had it hooked up to their *Digital Wrench" software and set the TPS however no improvement was gained. Any ideas?
