[s-cars] Mystery Miss

[Robert Myers]

Hi Y'all,

Thanks to all who responded about my son's dealings with his Mercyless Benz 
stealer.  Apparently contacting the corporate offices helped.  He finally 
has his car back from the stealer.  Now on to the topic of this post.

My '95 urS6 (RS2ed) has developed a mystery miss.

It happens only when the engine is stone cold.  It disappears after the 
engine has run for less than two minutes and does not come back until the 
next time the engine is stone cold.

FWIW, I have localized the miss to cylinder #4.

I have pretty much ruled out a fault with the PSO since the miss disappears 
after the engine has warmed up a bit.

I don't think it is a problem with a weak coil because there is absolutely 
no miss at high boost which is when a weak coil would show up.

I put new plugs in about a week ago so that shouldn't be the 
problem.  Performance is superb after the engine warms up.

Plug boots are reasonably fresh.

The wires to/from the coils have been freshly reinsulated with shrink 
wrap.  I am pretty confident that I did this job correctly.

What in the name of the Audi gods remains?  Any ideas?


Bob
Random Bushism: "A tax cut is really one of the anecdotes to coming out of 
an economic illness." George W. Bush, on The Edge With Paula Zahn, Sept. 
18, 2000
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Robert Myers   304-574-2372
Fayetteville, WV
'95 urS6  Cashmere Grey
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