cody at 5000tq.com
Thu Jan 17 18:21:08 PST 2008
To start with those MSD wires aren't going to work out too well without
changing to a different distributor cap. The stock cap uses pin type
connections (think of a spark plug with the end cap removed), whereas all
aftermarket wire ends use the cap style or internal barrel style. The older
distributor caps will work, but I forget what year the change-over was
made - somewhere arround 1985/1986 I think.
Your power problem can be any of a very wide variety of things, and you
started off pretty good. I know you are getting full boost, but have a read
here (http://www.sjmautotechnik.com/trouble_shooting/boost.html) for alot of
useful info. You don't happen to ever seen the check engine light pop on,
even briefly, do you?
I was having an issue on a newly aquired 5000tq (basically the same as your
200) that was a misfire when on boost, especially at high revs. I changed
the plugs, cap and rotor as you did (all looked terrible), and like you got
the same results. Then one day I was checking some things for another
project while the engine was running. As I moved my oscilloscope probe to
different points my hand got close to the coil-distributor wire and BINGO
problem found as it sent a few thousand volts down my spine ;-). Changed the
plug wire set and all is now well.
'87 5ktq - Fast.
'87 5ktq QLCC'd plus some
Rick Cone wrote:
> Hello, just signed up!
> I just bought an 89 200 avant quattro with a 10v turbo, 5 speed. It
> had sat for a year and a half before I bought it. Overall I really
> like the car; it only has one problem. It runs awesome at light
> throttle, but when you give her the berries, it falls flat on it's
> face. In 3rd 4th and 5th it really hesitates all the way up. It's
> like it has more power at light throttle than at full throttle. It
> is most pronounced as soon as it hits boost. But I get full boost,
> so I don't know what's the matter. I've replaced plugs, air filter,
> cap and rotor. Wires looked good and I heard these cars were touchy
> about wires so I'm ordering a universal set of MSD wires to make a
> set out of. It seems like the fuel pump is noisy too. where should
> I start looking? I want to get the ecm done, but first I need to
> iron out this problem. Thanks for your time!
> Rick A. Cone
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