My Delorean is a 5 speed manual. It seems that no matter how high I put the rpms in first gear. The car never fully accelerates. It sits there for a minute, almost letting the rpms fall until it begins to roll. I can't get a good start off the line. It this a problem with not enough horsepower, the throttle linkage, or the clutch? Thanks Willie Mack Vin 5043