code 66 common issues

[Super Hobo Man]

Hey guys just looking over a mates car and it's throwing code 66 yep worst code, it's so vague and annoying.

Basically what are common issues other than your typical Bbod since iv swapped that out already and still has the same problem.

It's an auto rev b from memory, symptoms are 0 boost on either turbo and it has virtually no up and go even compared to an NA SOHC, it probably takes a good part of 20secs to get up to 100kmh.

Going to test the lines for any vacuum leaks next but if that's not it then I was wondering if there is there any other sensors that typically crap out or what my next move should be? 

Any help would be much appreciated

 

Cheers      

[boostin]

Leaking bovs and worn pivot in secondary exhaust control valve. 

[LethargyGT]

Best of luck with this. I invested too much of my life chasing error 66 before selling my 96 GT. Like you say, it's a pretty vague code and the possible causes are endless. I checked and replaced pretty much everything bar the turbos themselves, and no joy what so ever.