86 coupe what seems to be missing cyl num 2-3

[Huw Powell]

> After having a hard time starting the engine in cold weather, boosted
> the car and then it started, but it ran really rough. Took it to my
> local mechanic. got there but really had loss of power. We found that
> pulling ignition wire from cyl 2 and 3 and no effect on engine( even
> though you could see a nice spark while pulling out the plug wire )

No Audi plug wires I've seen would allow me to see a spark when pulled, 
the connection is two inches up inside the boot.

You pulled the fule distributor, you even pulled the head - what about 
the distributor cap?  Triple check the firing order?

> Now thinking I have a problem with a valve. Did a compression test
> cyle 2 = 145 3 = 150 psi. 

I wish my coupe had numbers like that...

> My real question is. Could a low system pressure cause this

I doubt it, it is almost certainly cylinder specific.  of course, you 
tested everythign you could, swpping plug wires, injectors, etc - the 
only thing you didn't mention was the cap/rotor, and the cap has 
cylinder specific contacts in it.  It's a wild shot, and maybe you 
already checked, but it's easy to do.

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/