All readings are exactly the same 160 psi ignore the first photo 

On 9/11/2019 at 3:46 PM, savage bulldogs said:

I'd definitely start with a compression test (warm ideally) but as long as the figures are above 140 ish and all within 15% of each other , they're within factory spec afaik for a early classic. 

 

If it was limp mode or a timing issue I'd have thought you'd have a code but if its modded and "chipped " instead of mapped ?. I don't know if it would store a code or whether it's just a sensor reading something out of the maps parameters (then cutting ignition) .

If test comes back good ...

Does it rev freely in neutral or at cruise (part throttle) .

You've definitely plugged the coilpacks and injectors the right way round on both banks ? 

Fairly sure its light grey plugs to both side of each bank are for the rear cylinders for injectors and coilpacks .

Compression test is complete same reading on all cylinders