quote=rosie;4807494]my cosworth has a missfire under load, its fine on idle & when driveing it normally but assoon as u give it sum welly & the turbo is about 2 launch you it holds back & misssfires, sounds asif it drops a plug or sumthin

i have cleaned all plugs & cap up but still no good & the car is no fun lol

sum1 mentioned phase sensor??????
any idears?[/quote]
i had this problem took it to MSD it was coil they fitted group A item was a different car after