4kq no start after O2 sensor replacement, LONG.

[Huw Powell]

> Yes, my friend and I did, sorry, I neglected to say that.
> My friend said I do have spark.  

So you have spark, but might not have fuel, might not have air.

Try smelling the tailpipe after cranking, for gas smell; or looking at 
the plugs to see if they're wet.

Check carefully for glaring air leaks (since you had the ISV out?) that 
would result in the air plate not rising, hence no fuel delivery.

> Its just very strange that I drove the car that morning before I started work 
> on it, replaced the O2 sensor, and voila, no start.

Not that strange, it's probably not the OXS work directly, of course, 
(or the "ISV checking" that you did?), what it might be is that 
something got knocked loose or undone while you were doing this work.

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/