Engine Splutter At High Revs

[gL3nJaMiN88]

hey guys i got some plugs and changed my spark plugs yesterday , I was told by mechanic to run BKR7E and regap them at around 0.6mm gap . Now it idles great and doesnt hunt , drives real smooth but when i get it a hit it sounds terrible like a spark breakdown sound around 6,0000 and above . Im running fully built engine with Splitfires and i have never had this issue but then again i have never run that gap or plug before , (always BCPR7ES @ 0.8MM) also now im noticing my 555cc injectors reach 100% without really any load/boost ?

what have i done to my car ? can anyone help me

[DVS JEZ]

Try gapping them to .8mm and try again. Weird about the injector duty

[gL3nJaMiN88]

Yeh I'll try 0.8mm

[Dose Pipe Sutututu]

are you running 555cc and Z32 with an untuned PowerFC?

I'm assuming this from your latest thread about idle problems.

If so, it's makes perfect sense why your injectors are smashing 100% and your car is misfiring.

[Supa Steve]

what fuel pump?

[JonnoHR31]

if the injectors are randomly hitting 100% under light load then check your afm wiring. i had a similar problem with the same setup, a dodgy afm wire was randomly earthing out and sending the pfc 5.1v when just cruising along

[gL3nJaMiN88]

Yeh it could have that I'll look into it ? Do I just Check all wires are ok and not touching or do I have to pull apart and re solder ? Btw my car is makin 288rwkw and never maxed out past 75% until now . Fixed issue with plugs .. But still 100% duty with no splitterin . Can a slipping clutch cause faulty readings?

[JonnoHR31]

try and get someone to grab a look at afm voltage with it doing and not doing it, see how much difference there is