Pretty sure I seen 3 of them testing on I-80 in NE about 2 months ago. Front clip had covers over them... Cab and rear looked the same from what I could tell, but you could tell that they did have ram air hood.... :D
Is in in every gear? Mine is doing the same thing for the last year an a half, right at the same rpm that yours is but mine is only doing it in 5th and worse in 6th gear.... Also like you described worse on colder days than warmer days...
Any idea on turn around time? For a autocal, dsp5 for Lmm with 100% exergy's,
dual fueler and twins on stock motor??? And when would be the best time to get ahold of
you? Thanks