appreciate any help
2002 m750. 5.9 ecu. I have new belts with timing marks exactly where they were before I took the belts off. Valves checked. All closers will rotate with finger pressure on the shims. Openers set at .004". Throttle bodies synced. TPS set to 150mv plus or minus 10 with throttle plates closed. throttle plates set to 2.7 degress for idle. Fuel filter flows without restriction. I have Gunson gastester and VDST software. I had no trouble setting CO on my 998. The 750 runs _lean_ as in less that 1.5 CO. Try to add fuel with the software and engine just speeds up. Ideas? The spark plugs are showing lean mixture. Can the fuel regulator go bad? Have not checked the fuel pressure at the pump. Had one guy tell me I could not change the CO due to European settings. I don't believe that. See comment on my 998 also a 2002 with 5.9 ecu. Got it set to 4-.4.5% CO without troubles with same software and gastester. Sorry for the length. Any ideas or something I am missing?
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