[Enrique]

My 914 backfires on deceleration. It also does so when I back off the throttle then let the wheels turn the engine (as in downshifting and letting the gears slow the car when approaching stoplights). What causes this backfiring?

I've got a 1.8 with Webber 44s. I adjusted the valves but haven't touched the timing or carbs. Where to start?

Thanks!