2011 Rzr EFI runs great until CEL comes on, engine stutters like running on 1 cylinder. let off on throttle, CEL goes off and engine resumes smooth running. can’t get an error code. Checked and changed plugs, cleaned air filter, new fuel and added Seafoam to fuel. No change, engine pulls hard after CEL off and will runs good until CEL comes back, same process. As long a throttle is on the engine pull hard but at lower rpm CEL pops on and off and miss returns’
Any comments.

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