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Any suggestions for a 749s that seems to be getting worse with each passing track day?? She stutters (as if it has run out of gas) like mad when I get on the gas or even when a large headwind comes along. I saw another thread that said do belts and valves (its time for this but waiting for winter) but can belts and valves make this much of a difference? It was all good but I have been at the track the last few weeks and it seems to get worse each time and now its even noticeable on the street. It happens at all RPMs so I thought maybe PC3 but with it being all stock that seems dumb. Any other suggestions of where to start or just dive into the belts, valves and throttle?
thanks
Scott
thanks
Scott