02-07-15, 08:42 AM
The TPS feeds into ignition system details on how far open/closed throttle is and how quickly it's being opened/closed. The ignition system also has a feed from the speedo to use in its calculation for the ignition timing. That could explain why it's only a problem in first and second gears.
Haynes manual also has the checking/adjusting details in Chapter 5. It only takes 5 minutes
Haynes manual also has the checking/adjusting details in Chapter 5. It only takes 5 minutes