Pulls fine all through the rev range but gets to around 6,000 and starts to stutter. If I keep my foot planted it will continue to stutter but evenually get to the limiter at ~7250 (set by Stealth after remap). Isn't the same each time, sometimes the stutter will start at 6,000 and other times it may not begin to stutter until 6,500 or 6,750.
Any ideas? No stuttering at any RPM below this and has only started in the past week. Remap was 2 or 3 years ago so nothing to do with this but odd it is only stuttering at high RPM. Usually would rev cleanly all the way through to 7,250+.
No EML light on and otherwise is performing fine, not down on power or anything. Anything obvious to check or is it something for the garage to plug in and see if anything flags up?
Thanks and Merry Christmas all