This is a discussion on 800rzrs within the General Member Discussions forums, part of the The RANGER STATION ~ Rangers and RZRs category; My motor misses bad when in low range and at high rpm. Put in new plugs air filter. Still does it. has anyone else had ...
My motor misses bad when in low range and at high rpm. Put in new plugs air filter. Still does it. has anyone else had this happen? 2008 How about new injectors?
Check fuel pressure. Over the years the majority of RZR 800 performance problems have been fuel pressure related. You don't mention the year of your RZR however for the older 800 units 2008 - about 2011 or 12 the pressure should be 39 +- 2psi for the newer ones it is somewhat higher about 45psi, but I don't know for sure. Make sure the pressure maintains at all rev levels if at any time it drops below spec that is your problem.