| Any air leak into the induction system will cause a backfire.
my car runs a pair of SU's and used to belch flame every time I let off.
I serviced the carbs, including new throttle spindle rubbers and it stopped doing it!
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1985 DAX 427, Black, no scoop, no brightwork, no paint, 15" Revolution split rims, BFG boots, 3.5SP6RV8 with modified 4.2 heads, modified SU's with K&N, Kent 180 over Rhodes lifters, SD1 chain cover / P6 water pump, SS headers & side pipes, Jag/Jag with uprated lowered springs, AVO shocks, Red Dot spiro discs & fast road pads, Toyota Supra CR high 5th box & special clutch.
Looks like a dogs dinner, drives like it's taken 20 years to develop! |