how you doing stu been a bit busy so missed your message, i think your car needs to start with basics, ie oil pressure test for start, i had one that i bought after it done its turbo and it went in to diesel runaway ie all its engine oil got just as fuel and it seemed after that all was well but kept not boosting right and it really got me spinning trying to find the issue, the issue was main end bearing worn out from the over run and lack of oil pressure to float the turbo bearing and this caused drag on it so would not make the boost until engine rev's higher ie more revs slightly more oil pressure then would boost,, mine in the end was killing turbo's 1500 miles.. so hot engine oil pressure test think you need first off. filing that and you want someone to look at it i do a few timing chain jobs for a tuning company he's proper good fair on price and acn remap and dpf deletes etc, he can also read your ecu and sensors on a deeper level than i can or autocom can,, but like said need to know you have the basicsHi
Really after some pointers as I have run out of ideas.
58 Cooper D
When I got the car I only drove round the block but the turbo was noisy had a new turbo fitted but I got ill and didn't look at the car for 2 years, when I came back to it. No boost below 2K, fitted new boost control valve it cured intermittent boost problem but no boost below 2K, 3 or 4 people say it can only be the turbo, today fitted another turbo, which I sent away and had it tested first off sounded good but no boost under 2K then 1/2 mile down the road boost deviation code, got home to find the nozzles seized. I am going to send the original turbo off to be rebuilt.
Can there be something else wrong with? The latest guess is a previous owner had it mapped but it has lost it.
As I say any ideas are welcome right now.