Quote Originally Posted by TexNeck View Post
With your MM3, go to the menu and select change PID; the percentage menu has the rail pressure items you’ll need.

Select the rail pressure actual for one and the rail pressure desired for another.

Side by side is easier to monitor both- ideally, they would match 100% - some variance is average, but there is a fine line between okay and too much.

Usually, about 1000psi difference or more, I think there is an issue/opportunity for improvement.

Take a drive and look at values when symptoms occur and report back!
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