backfiring at speed

[TRANTER]

driving my golf yesterday for about 8 mile real nice to drive about 75mph then i put my foot down and it pops and backfires and seems to judder just a touch then it clears just like that any ideas anyone first time its done it cheers all, New battery , plugs ht leads , dizzy cap , exhaust , and coil

[Khare]

fuel setting too rich maybe

[TRANTER]

yes could be mate as when i was driving back the revs were a tad high so i adjusted the screw when i got back to around 980 where it idles real nice when warm would a fuel filter change be a good idea

[Diamond Hell]

Check your earths - could be one of them is dirty but is only breaking down under load.

[TRANTER]

whats that on the injector or plugs that need checking cheers mte

[Diamond Hell]

The earths - from the ECU to the chassis, from the engine to the chassis and the engine and battery to the battery.  A dodgy connection to any of those, which is cutting power could result in no sparks from time to time and backfiring.

[TRANTER]

yeah sound mate will check them out as my battery dies from time to time with a new battery coil fitted and alternator