Btw i believe the ecu after a disconnevt , learns up until the coolant temp reaches normal or turns on the fan. It may hunt at idle and flat spot a bit until it learns you may have to coax it a bit.
Also initial suspicion is airflow meter may be faulty or low quality.

 

Well i worked it out .
when they fitted a second hand engine to it they changed the timing belt and crank seal .
dun dun dar they broke a tooth off the crank cam pulley. (Making the ECU think it has two TDC )
why this makes it kill spark to coil 1 and 6 and also kill the injection for 2 and 5 .
who knows but mine runs sweet now

 

Great that you solved the problem amd that you posted your solution. Will help amyone with si.ilar issues or eli.inaye a qiestion of what happens with a broken tooth.🤣

 

Well i had a thought today .
i put the crank it the location so the missing tooth was inline with the pickup and it is very close to been the firing point for coil 1/6 which might also be the point the ECU uses to time the injection for 2/5 .
just a thought

 

Might be useful knowing that esp for aristo vs gs crank trigger systems .