2004.5 Sportsman 700EFI running lean

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Oct 15, 2018 | 03:05 PM

Carguy89

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2004.5 Sportsman 700EFI running lean

Hello. I am new to this forum and I am looking for help. I have a 2004.5 Polaris Sportsman 700efi that is running very lean and backfires at low throttle and does not like to idle once warmed up. Fuel pressure is at 38-40psi and I am getting code 51 and 52. I have tested the Tps using the Polaris tester and also replaced the t-map connector. as far as I can tell both intake boots are fine. ( tested them by spraying carb cleaner on theem while it is running) I am at a los with this thing. Does anyone know what I should check next? Thanks in advance.

Feb 20, 2019 | 08:45 PM

bluetick

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Joined: Jan 2019

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Carguy. Im havtng similar problems with the same machine but I think mine is running rich. .I ordered the T Bap connector today. Not saying you did just a reminder you don't want to use carb cleaner inside your throttle body or on sensors. I did use CRC brand throttle body cleaner and MAF sensor cleaner it helped brought the idle back and ran fine now I have other problems.

Last edited by bluetick; Feb 20, 2019 at 08:50 PM. Reason: Added to it