Search the Community

Hi Gents, Just thought I would ask this question on here as its doing my head in, recently had the car tuned, got it back was perfect, month or so later car starts spluttering, hesitating, misfiring etc all in the low rpm/cruise, thought it was as simple as changing plugs, no So got new plugs, gapped them the same as the tuner had them, R35 coil packs are brand new from dyno tune, month or so old. Go for drive last night, its the same if not worse, spluttering, hesitating and popping, and one stage it nearly died, this all happens on light take-off or cruise, you can here the boost building but car isn't accelerating, if I keep my foot down once it finally climbs out of low rpm it clears up and comes good. Look at my Haltech dash in the low rpm range afr's are like 19,20,21,22, voltage reads fine at 14 My thoughts - maybe heat range on plugs to cold, currently are 8's? - coil pack faulty? they are like month old thou? - fuel pump starting to die, but then why would it be ok in higher rpm with boost? - injectors need cleaning? Given the AFR's im seeing something tells me the fuel isn't getting ignited? Any help would be great.