[s-cars] Help Chipping a Virgin

[Mike Miller]

Agree with Ian - boost leak if you can hear a "hiss". The increased 
boost pressure may have split the michelin man hose.


On 10/12/2015 10:14 PM, Ian Duff wrote:
> Boost leak maybe? What did you use for hose clamps?
>
> -Ian Duff, sent from my mobile, please excuse the brevity, spelling and punctuation.
>
>> On Oct 12, 2015, at 23:49, Brian Pleet <subscriptions at strategico.ca> wrote:
>>
>> After 20 years with my 95.5 URS6 , I finally bought the Intended
>> Acceleration basic chip set in preparation for the Audi Sonoma track event
>> this coming weekend. Too late, it seems because although it feels overall
>> much quicker, when I go to the floor, it hesitated and hisses from under
>> the hood until I release the pedal.
>>
>> So far, I replaced the 20 year old blow-off valve, no change. Then I ran it
>> with a stock ECU, no change. Then I ran with a used (unknown) Wastegate
>> Frequency Valve and it ran fine with no boost, stable enough to get home
>> from Seattle. Then I replaced the WGFV with a OE unit and the problem has
>> returned. I opened the wastegate cover but no obvious issues, diaphram was
>> perfect. Today, I swapped the mass air sensor and the hesitation went away,
>> but the hiss continues and under extreme acceration, the oomf is absent
>> until it gets above 4000RPM. More fun to drive, but not perfect for the
>> track.
>>
>> Historically, and maybe related; the fuel pump failed last month so I
>> replaced it with on OE unit. I've taken the throttle body off a few months
>> ago to replace the hoses and seals underneath, but it was reassembled and
>> working fine. I installed a set of 034 silicone hoses.  I replaced the
>> noisy blower motor without removing the heater box. I replaced the one
>> still original POS with a new one.
>>
>> She's not taking the loss of virginity well. My tech advisor suggests the
>> hiss is exhaust trying to get through clogged 20 year old  catalytic
>> converters. Any other ideas welcome, or I'll see you in Sonoma.
>>
>>
>>
>> Brian
>> 90 90Q 20v
>> 95.5 S6
>> 06 TT Roadster
>> Vancouver BC
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