Hmm I'll check my plug gaps at the weekend as Iv herd they are quite sensitive to this, the car has had a new fuel filter, if I wasn't getting the flow would that be the pump or is that a blockage?
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Missfire happens when the ignition system can't burn all the fuel.
so if you have a boost leak it will overfuel and missfire
If the cylinder pressures are too high for the spark to ignite properly you get a missfire.
so in order of checking before spending more money on parts.
do a boost leak test.
check that connections on leads are clean (brand is good quality)
Which ngk spark plugs did you fit? Should be BKR-7EIX.
check the spark plug gaps and reduce them couple of thou at a time as most come in the box at 0.7mm for modern ignition systems, as mentioned before reduce them.UrS6 Stroker + HTA3586 =
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Running 1.6bar on mine and pfr7b plugs, missfiring stopped once gap reduced below around 0.62mm.1986 Coupe q - 2281cc 3B, chargecooler, 2.75" exh & downpipe, ported head, water injection, CGR box, modified MD357 turbo, 440cc injectors, high power coil.
2004 A4 2.5TDi convertible, re-mapped to 180bhp
2011 A5 sportback 3TDi-Backbox delete, remapComment
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It looks that my cheap eBay boost gauge is saying Iv got 1.8bar not sure if that's right but u reduced my gap on the plugs to 1.7 loads better Iv just got a little miss sometimes on full load up a hill in 5th. I'm going to renew all boost hoses and vacuum hoses to see if it's just a slight leak that's causing this now, If not I'll reduce the plug gap a little moreComment
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