Uneven turbo pressure - Alfa Romeo Forum
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(Post Link) post #1 of 3 Old 31-08-12 Thread Starter
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Uneven turbo pressure

Hello everybody. I have a problem with my 166 2,4 FL and need some help. When driving uphill in high gears and flat pedal, the power is first ok, then going up and down, just as the turbo pressure is not stable. I have Multiecuscan, but the data is difficult to understand (for me). For example is desired air quantity and measured air quantity not corresponding at all, desired lower at normal driving, higher at full load. EGR valve,MAP, turbo boost valve and hoses are new. Can MAF cause this fault, I tried to disconnect it but all the same. Can someone advice what to look for at Multiecuscan? Thak you in advance
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(Post Link) post #2 of 3 Old 01-09-12 Thread Starter
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Anyone?
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Brera 2.4 JTD

Hello Jens, air quantity won't help you much here I think. Desired air quantity is relative to the EGR (if i'm not mistaken) and is of no interest to us.

What you must do is log: rpm, boost valve solenoid (not the correct name, but something like that, its before the boost parameters), desired boost pressure and boost pressure. This will show what is happening with the turbo.
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