Bonneville America Forums Forums Technical Forums Exhaust Pop at desceleration

Bonjour mate.

All Our EFI Triumphs pop when decelerating ... IF the AI is still intact and the O2 sensors are still operating. You must disable them to stop the popping.

The pop usually occurs in the headers when the computer tells the AI to pump more O2 into the fuel mix on closed throttle to deliberately ignite unburnt fuel detected in the headers.

You have drilled a hole in your rear baffle and the popping sounds much louder and you're noticing them more. Drilling the baffle won't make it pop any more or less.

There are several threads on eliminating popping. Try searching for EFI and AI elimination and Popping.