Operation CHARM: Car repair manuals for everyone.

No Part Throttle Downshifts

1. Check for binding throttle valve.

2. Check for throttle valve limit valve binding.

3. Check for spacer plate hole plugged or not drilled through.

4. Check for improperly positioned or damaged valve body gaskets.

5. Check for throttle valve modulator downshift valve stuck.

6. Check for improperly set throttle valve cable.