The bucking or boost cut can also be as simple as a small airleak somewhere. You really need to pressure test the intake for leaks, also the hose from maf from turbo. I had the same problem on mine which needed no more than a quarter turn on the clamp at the turbo, was leaking just enough to suck in unmetered air and cause an overboost condition. Also worth testing the N75 valve is airtight when closed, seen them leak too causing the same problem.
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91CQ20v - Gone to a new home
93UR-S4 - The Magic Carpet
94S2Bus - The Emerald Express -
i reckon its the MAF connector, Ive been blown away by a golf gti twice last week on the way to work..
car was suffering (intermittently) from boost cut/jolting under load
checked for air leaks etc, applied mark h mod still had the same problem.
quick wiggle of the maf connector (plug in and out a few times) and its back to life/no boost cut.
Many thanks to John
for his help/expertise on this matter. search this forum for 'maf connector' you should see his post.
good luck!''I'm 999 thou' short of a mill!''Comment
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Maf connector trick worked then Biggs! Excellent! Pop those female pins out and get some worn out 1000 grit wet and dry and contact cleaner between them for a long term fix
What you can't see in that perfect looking MAF connrector is the tiny spot of corrosion between the two faces of the female pins right where they contact the male and the current passes through to clean the filament.
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yep, on my list of to do;
thanks again John.''I'm 999 thou' short of a mill!''Comment
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