Here's the numbers I got from fully warmed up at idle on the scanmaster? Totally different readings the GN? Any help would be greatly appreciated. Hopefully there is a site that explains the numbers and values and what to look for etc. Here it goes: 074-72602's 0.0KR MAF 0.9 SP 25.5 PU 2.5 DTC (NOTHING) Lt 02 Cel 00 St 00 ATS 46 Clt 120 TPS .48 TPP 00 RPM 892 (FLUCUATES) IAC 58 BATT 14.2 EGR 00 MAP 32 Not familar at all with these numbers or what the values should be? Totally different than the GN readings and the scanmaster instructions don't go step by step like the 2.1 scanmasters do? As far as setting the TPS, IAC etc.