Engine randomly dropping to 3 cylinders when driving.

[s13eater]

could it be a plug breaking down or an injector blocked.

[Retros12]

i think it could be a lose lead since its only when changing gear maybe when the engine rocks it moves the lead! ill havwe a play this weekend see where i end up.

ill check the injectors and plugs cheers mate.

[CamInHead]

Could be a bad dizyy cap, rotor arm, possibily earth somewhere, lots of things really. Be easiest to see if you're getting a good spark on all 4 cylinders first, I should think.

[Retros12]

think i found the issue! major air leak!! the CAC pipe was not tight! so when ever it boosted it would leak air.