[Gmecm] Tracker TBI problem solved!

[Chris Reynolds]

I doubt the vacuum leak would have shown up as a lean codition on a MAP based EFI system.   The almost always show up as an over-rich mixture.  Atleast in my experience with GM TBI vehicles.

bcroe at juno.com wrote:  I'm betting, a Wide Band OX sensor monitor would 
have showed this lean condition immediately. Can't 
have too many gauges.

Bruce Roe

8 Jan 07 Cowen writes:
> Hello folks! First let me thank all of you for your
> suggestions re: my wife's 1992 Tracker. To recap, it
> was getting poor mileage, failing emissions testing
> because CO was spiking off the scale every time the
> throttle was increased, and hesitating on
> acceleration.

> I pulled off the
> Thottle Body... and found the gasket to the intake
> manifold was disintegrating! The gasket was coming
> apart like wet paper, and the soft chunks were moving
> through the throttle body, plugging ports, although
> there were no external vacuum leaks.
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