Hey hodge,
I put the EGR block in and fitted my Dawes yesterday, wasn't going to put a needle valve in. I to now have similar problems at 100 as yourself. Boost will settle at 12 flat road no throtle change, then boost will drop to 5, egt will rise to 400 then will go back to 12 egt drop and so on. Was thinking I may need to go the needle valve. Will play a bit more first.
Lemo.
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