ive got a escort cab that ive converted to rs turbo runing fiesta turbo engine, OFAB loom and ecu but since useing it this year im getting a misfire when first driveing but after it gets going its ok.

does one know what it might be?
im going to change the plugs, fuel filter and see if that sorts it as got a 195 chips to go on it but want to sort this out first

thanks

 

worth a try but make sure ur crank sensor is plugged in ok

 

What boost you running mate ???