P8 pro miss fire on 1&4

[Benmk1]

I have a mk1 golf with a 1.8t 20v out of a mk4 golf engine in brought the Ecu u and loom from someone down South said came off a car that ran fine, but was running bigger turbo and injectors than mine, it's a p8 pro gm type map sensor, just brought a new one as didn't supply with one have normal Vw 4pin amplified coils, runs standard crank sensor which is 60/2 pick up, will run ok on 2/3 with apart fine but not on 1/4 are these Ecus common for drivers to fail, really confused wiring loom was made buy a big company fully like Motorsport loom just wondering if anyone could recommend anything? Thanks a lot Ben

[Rob Stevens]

I think first thing to try is test injectors and coils, swap the pair that is running to the pair that isn't running.
Also how is it wired? you have 4 amplified coils? does each one have its own ecu connection or are they joined somehow?

[stevieturbo]

I think the P8 needs pullup resistors on the ignition outputs to allow external amps to be used ?

[Benmk1]

It has got resistors linked in each plug the company made the loom have do a real good job, I guess u have 2 earths on the 4 pin coils 12v live ignition live and then a switch wire off the Ecu I assume a p8 pro hAs 4 drivers for coils as omex and that only have 2 and u just link the like 1&3 2&4 just blagged tryed all basics coil injectors work just seams strange thanks for the replys thanks Ben

[stevieturbo]

I would wire 1 coil per driver in firing order, then enable twin spark with zero offset

This is assuming you are not running proper sequential, ie crank and cam sensor working.

[Benmk1]

It's not running cam sensor mate just crank and I guess would be like a wasted spark ignition not had a lot to do with dta so not sure thanks for the replys

[Rob Stevens]

In general engine settings make sure that you have twin spark 'on'.
Make sure you have external amps on.
Make sure you have set to 4 cylinders.

but even if you had twin spark off it should run on cylinders 1&2 not just 2&3. Plug leads ok?

[stevieturbo]

Do all 4 fire sparks when conducting a coil test ?

[Benmk1]

Sorted was resistor thanks boys