No Boost over 1.0

[Tyson Varosyan]

What you are describing sounds like a very classic case of spark blowout. I
don't know how much of an issue it is with these motors, but with the
Mitsubishi 3.0 Twin Turbo this is VERY common. I don't know all the science
behind it, but at higher boost it is harder for the spark to jump across the
plug. In my 3000GT club, guys running higher than stock boost have to gap
down their plugs to prevent the exact problem that you are describing.

Remove your plugs and examine them. If they are fresh, clean the inside of
the contacts with some sandpaper and/or wire brush and re-gap the plug to
stock or slightly smaller gap. If they are worn, replace with new ones. I
would recommend triple platinum, or at least double platinum. I have had
horrible luck with the multi-electrode type plugs and spark blowout. I
recommend to stay away from "spitfire" or "+4" type plugs. Get the regular
single electrode plugs that you can gap yourself. Check the gap - regardless
of what the pimply kid behind the parts' store counter says, they are NOT
properly gapped from the factory! Install and test the car. If the problem
is still around, gap the plugs down a bit. On my 3000GT stock gap was
.038-.041. Running only 2 PSI over stock boost, I and many others ran .032
gap to prevent blowout.

Good luck, let us know how it turns out.

Tyson Varosyan
Technical Manager, Uptime Technical Solutions LLC.
tyson at up-times.com
www.up-times.com
206-715-TECH (8324)

UpTime/OnTime/AnyTime

-----Original Message-----
From: quattro-bounces at audifans.com
[mailto:quattro-bounces at audifans.com]On Behalf Of SuffolkD at aol.com
Sent: Wednesday, September 08, 2004 8:43 PM
To: 200q20v at audifans.com; Jeff.Bernstein at pneumaticscale.com;
libenaudi at yahoo.com
Cc: quattro at audifans.com
Subject: Re: No Boost over 1.0


Jeff's got me thinking.........Bucking.......
Spark plug wires?  Make total sense, misfire = low boost due to misfire.

Spray a mist around them, better in the dark.
-Scott by BOSTON

> From: Jeff.Bernstein
> At 09:31 AM 9/8/2004, Audi Quattro wrote:
> >I recently replaced the MM hose, so thats not the culprit robbing me of
my
> >boost.
> >Lower hose seems fine
> >any other ideas? Car pulls till about 1.0 -1.1 and then start to hickup
> >surging back and forth badly.
> >thanks for all your help!
> >
>
> I have had this problem several times after I have cleaned the engine.  I
> believe the problem was due to some moisture in the distributor.  It would
> run fine until I started to produce boost and then it would start bucking
> until I backed down on the boost.  It would take a couple of days to dry
out
> and then it ran fine.  Haven't cleaned the engine in a long time to avoid
> the problem.
>
> Jeff Bernstein
>


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