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2009 ranger 700efi idle problem

This is a discussion on 2009 ranger 700efi idle problem within the Full Size Ranger Discussion forums, part of the Polaris Ranger Forum category; I puchased a 2009 ranger 700efi, it was running great for the first 16miles and it started to run rough. Normally idling at 1150-1250, it ...

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Old 10-09-2011, 09:49 PM   #1
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2009 ranger 700efi idle problem

I puchased a 2009 ranger 700efi, it was running great for the first 16miles and it started to run rough. Normally idling at 1150-1250, it dropped to860 -950, I shut it off and restarted it a few times and it fixed itself...until it did it again. This has been going on for 2weeks. It will run great for a while, I will shut it off and try to restart it and it will, but rough. I changed the plugs, gas, I have read TPS issue, does this sound like a TPS problem?
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Old 10-10-2011, 09:03 AM   #2
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Not sure, but here is what the manual says when it comes to EFI problems:

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80% of all EFI problems are caused by wiring harness connections. Follow a common sense approach when diagnosing a potential EFI issue:

1. Disconnect the harness at the suspected sensor connector.
2. Inspect the connector ends for damage or contamination. If damaged, repair; if contaminated, clean. Reconnect and check function.
3. If the problem persists, perform a sensor bench test according to the specific sensor requirements.
4. If the sensor bench tests pass, disconnect the connector at the ECM and perform a continuity check between the sensor connector and the appropriate pin at the ECM connector (all connections for that sensor). Wiring resistance should be less than five (5) ohms.
5. If the resistance is high (or open), a wiring harness inspection is dictated (including a thorough inspection of the ECM connector for contamination or damage).
6. If the sensor passes and the wiring passes inspection, and reconnecting the ECM does not resolve the issue, then at that point a known-good ECM (from another 500 EFI) could be connected and tested for problem resolution.
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