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I would assume that for a boost stumble as bad as it is, a leak would have very noticable...but I wouldn't put it out of the equation my any means. Will double check all hose clamps.
All the vaccum hoses are new and have been replaced within the year. The venturi hoses have been updated with Lindsey hoses. All brand new.
I do not know how old the intake boot is, but I inspected it while I did my engine top end rebuild and there did not appear to be any cracks. It was still soft and flexible.
I will double check the IC hoses.
The TPS is new, 1-year, but the AFM could be part of the problem. How could that be diagnosed?
btw, thank you for the insight.
-Steve
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'08 BMW e90 335i 6MT stock [aka 'take two']
'12 Dodge Durango [family hauler]
'86 951 (K&N Cone, Welt Chips, Tial, Zeitronix, P&P O-ring PH Head, WFHG, AFPR) [in storage]
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