Wow. I just unplugged my O2 sensor and have had the same transformation.
Wish I had figured this out months ago - but better late than never (thanks
Greg).This still leaves me wondering something about the O2 sensor though. I
understand that when the engine is cold the sensor should be in open loop,
effectively disabling any input from the O2 sensor. Why then would my engine
run poorly (laggy performance under 2500rpm) when it was cold (as well as
after warming up)?

Cheers,
Greg S.
87' Hardtop Wolfsberg
Ottawa ON

On Sun, Oct 18, 2009 at 8:17 PM, Greg Potts <greg@pottsfamily.ca> wrote:

> Hi Chris,
>
>
> Then I tried unplugging the O2 sensor; It was like I bought a whole new
> engine.
>