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I'm comparing it to my M1097A2 with a tach. It idles at 650ish. Sounds normal. My R1 sounds way faster. I'll invest in a cheap photo tach and go from there.

Raining out now...I'll have to check another day. Probably best....I'm sure I'm missing something simple.

My rig seems to idle high (too fast). I've followed all the advice I've received so far and nothing changes...still fast idle. I took a look at what IP I have installed currently. Looks to be a DB2381-5485, part# 12561514. From the research I've done, that IP belongs in a 6.5 turbo (98-00...