Tank Mike

I have a 4x4 saph on a j reg. It has a chip, bigger injectors, a 3bar map sensor. It holds around the 22psi mark under full throttle.

it was set up 3 days ago and it drives better than it ever has done scince owning it..

I had this annoying little problem where the car would slightly missfire under hard acc but only when you had been footing it quite a bit before hand. (only when the pulgs were really really hot)

The pulgs that were in the car were NGK BKR8EIX gapped to 1mm

I have just put a set of BCR8ES gapped to 1mm in, after being told they were really good and would suit fine. now the car missfires on boot all the time. anything over about 7 psi and the car badly missfires. i can only asume that the boost is blowing the spark out.

What i was wondering is if people on here have had this problem and wether these are the correct plugs or not?

or is the coil to weak.

just after some guildlines really.

thanks in advance

Turbo Zetec

iTrader: (1)

smaller gap required... try .6mm and see how you get on

Gary F

iTrader: (1)

Your plugs are gapped to 1mm?

I'd personally get a group A coil, and a set of 701's and gap them to around 7mm

KSA-Cossie

iTrader: (4)

Or denso ik31's.

timster

Good call

Jay,

iTrader: (4)

aye thats the advice you need decent coil 071c's ans .65/.7 gap

tabetha

I ran .85mm with a group a coil, get decent leads as well, Magnecor would be my choice.
tabetha

Tank Mike

thanks for all the replys. i'll give that a go

Matt Baxter

iTrader: (37)

Thats one hell of a gap

KSA-Cossie

iTrader: (4)

Gary F

iTrader: (1)

Well obviously 0.7mm

Fiecos Dan

Change too better plugs and smaller plug gaps.

tabetha

The 1mm was so he could drive a bus through!!
tabetha

foreigneRS

perhaps that was the problem, the wind from the bus was 'blowing the spark out'

JTECH James

iTrader: (13)

tank mike...you have pm

Tank Mike

thats what auto data said to gap the plugs too

Fiecos Dan

For a std car, running std boost.

Tank Mike

re gapped them to 0.60mm seems alot better. still slightly misfires some of the time when giving it a hardcore thrashing.

next step will be a gp A coil me thinks

Thanks again for all the help

Fiecos Dan

try going .45mm

tabetha

I remember when I got my cossie and gapped the plugs to 1.0mm, it would not even start and only fired once or twice when turning over, I foloowed the data on the intercooler panel!!
tabetha