[200q20v] ECU upgrade question T*P wasn't good

[Brian Link]

I agree totally,  The previous owner of my car had a tap chip and spring 
installed.  I had surging problems under high boost situations.  I 
installed a boost gauge and air/fuel gauge to trouble shoot.   on the boost 
gauge I could see surging of +/- 5psi of boost.  On the airfuel meter the 
mixture would go full lean at 12 psi with  partial throttle and would stay 
lean until full throttle enrichment kicked in.  I checked and replaced all 
the usual suspects:  throttle switch, multi temp, wgfv, o2 sensor, vacuum & 
boost hoses, checked spark plugs, checked rotor, washed the car, no change 
in performance. I finally broke down and switched ecu programs.  Now I have 
more boost, no surging, better gas mileage.  The T*P chip was the problem. 
 I kept the spring installed,  There is more boost earlier with it 
installed.

Brian Link
Boulder, CO

Date: Tue, 23 Oct 2001 19:45:24 -0400
To: DanMurphy1 at aol.com, 200q20v at audifans.com
From: Brett Dikeman <brett at cloud9.net>
Subject: Re:Message: 4
Date: Tue, 23 Oct 2001 19:45:24 -0400
To: DanMurphy1 at aol.com, 200q20v at audifans.com
From: Brett Dikeman <brett at cloud9.net>
Subject: Re: [200q20v] ECU upgrade question

At 3:15 PM -0400 10/23/01, DanMurphy1 at aol.com wrote:

>I just sent my ECU to tap for chip and spring upgrade.

TAP's chip is inferior and the spring is NOT necessary on the 3B
engine(and the spring should NOT be installed, it raises the
limp-home mode maximum boost which is a VERY bad idea.)

At 3:15 PM -0400 10/23/01, DanMurphy1 at aol.com wrote:

>I just sent my ECU to tap for chip and spring upgrade.

TAP's chip is inferior and the spring is NOT necessary on the 3B
engine(and the spring should NOT be installed, it raises the
limp-home mode maximum boost which is a VERY bad idea.)