2017 Polaris Ranger 500 EFI Mid-Size - Shuts off at low RPMS | Hard Restart

pilotryan · 2023-03-14T09:26:23-0400

I have a 2017 Polaris Ranger 500 that will start and run immediately upon firing it up in the garage. It has a little of a rough idle at first but then levels out. It will idle for a few minutes and then just die. When it dies, it will not restart immediately. I can crank and crank with no restart. I can cycle the key with no restart. I have to wait about 2 minutes and then it will restart.

If I start the Ranger for the first time in the garage and back out, it will immediately die when I let off the gas to stop and shift into h/l. At this point I have to wait a couple minutes to get it restarted. It will run and drive fine with a bit loss of power. When I slow down to stop and let off the gas, the engine immediately dies. I am unable to keep it running using the gas pedal.

I have done the following so far and not one thing has improved the condition or fixed it completely. Any guidance or insight would be appreciated.

1. Replaced the fuel pump 3x with 2 Quantum and 1 All Balls. Checked fuel pressure while running and after shutting the engine off and I get well into the 50s and 60s psi
2. Replaced coil wire
3. Replaced ignition coil
4. Replaced ignition/key switch
5. Replaced spark plug and wire
6. Replaced Starter Solenoid
7. Replaced TMAP Sensor
8. Replaced Crank Position Sensor
9. Replaced Injector
10. Added a seat belt harness bypass
11. Replaced Power Regulator
12. Tried a new ECM
13. Checked all wires and cables while Ranger was running and nothing shuts it off

Have not replaced throttle body but removed cover and it is super clean inside. The overall Ranger is clean with no damage.

Thank You

BPS · 2023-03-14T09:51:03-0400

The first thing i would be checking is when it won't restart is it getting spark at the plug. That will at least point in the direction of either no spark or no fuel.

pilotryan · 2023-03-14T09:52:32-0400

BPS said:
The first thing i would be checking is when it won't restart is it getting spark at the plug. That will at least point in the direction of either no spark or no fuel.

Thanks. It definitely has spark to the plug. It will start immediately and restart once it sits for a couple minutes.

Jungleman · 2023-03-14T10:36:53-0400

Ryan, did you replace the TPS & injector with OEM parts ?

pilotryan · 2023-03-14T11:38:38-0400

Jungleman said:
Ryan, did you replace the TPS & injector with OEM parts ?

The injector I ordered from Fixmytoys and it was OEM - Polaris 2521621 Throttle Body Fuel Injector OEM 2017-2020

I don't recall if the TPS was OEM or an Amazon product - Duplicate

I also forgot to mention I replaced the gas pedal with an OEM one.

pilotryan · 2023-03-14T11:57:45-0400

Jungleman said:
Ryan, did you replace the TPS & injector with OEM parts ?

Jungleman - The more I looked into the list of items I have replaced, I think I am getting the TMAP confused with the TPS. I don't actually see a TPS sensor for the 17 ranger 500. It only shows

Rectangle Font Parallel Pattern Triangle

Jungleman · 2023-03-14T12:43:30-0400

ETP.....Electronic Throttle Pedal .. No TPS ....

Any stored EFI codes?

pilotryan · 2023-03-14T13:03:34-0400

Jungleman said:
ETP.....Electronic Throttle Pedal .. No TPS ....

Any stored EFI codes?

No codes that come up on the display. I am not able to scan it with anything and honestly have not taken it to a dealer because they would most likely be doing what I am doing, parts swapping, but at a shop rate. I am not sure what else there is.

rocknroll · 2023-03-14T14:06:10-0400

You might check the exhaust valve clearance.

pilotryan · 2023-03-14T16:01:56-0400

rocknroll said:
You might check the exhaust valve clearance.

Thanks. I have looked at it but not checked it. Not really sure how to with the overhead cam. Someone mentioned to me before that they may be too tight but not sure to do if they are.

BPS · 2023-03-14T17:10:56-0400

pilotryan said:
Thanks. I have looked at it but not checked it. Not really sure how to with the overhead cam. Someone mentioned to me before that they may be too tight but not sure to do if they are.

Purchase and download a service manual. Valve clearance check and adjustment are lined out step by step.

pilotryan · 2023-03-14T17:16:52-0400

BPS said:
Purchase and download a service manual. Valve clearance check and adjustment are lined out step by step.

Thanks. I will do that. Is there a best place to purchase from that has everything in the manual?

pilotryan · 2023-03-14T17:34:43-0400

BPS said:
Purchase and download a service manual. Valve clearance check and adjustment are lined out step by step.

This is the service manual I have and this is what it shows. Not much of how to.??

joebearhunter · 2023-03-16T19:34:28-0400

Try new fuel injectors - cured mine & I had already tried most of what you have done already ! Also bought some expensive plug wires and it cleared all my codes except one

pilotryan · 2023-03-17T07:10:54-0400

joebearhunter said:
Try new fuel injectors - cured mine & I had already tried most of what you have done already ! Also bought some expensive plug wires and it cleared all my codes except one

Thank You. Anything is worth a shot at this point.

2017 Polaris Ranger 500 EFI Mid-Size - Shuts off at low RPMS | Hard Restart

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