Changed out the breather hoses from the air filter housing/valve cover/rotary idle actuator including new plastic T and joint.

Also swapped out the Fuel Pressure Regulator coz the old one had a little fuel leaking out the vac hose.

Readjusted fuel mixture with EHA on.

Drove car hard - 15 minutes of sheer pleasure, car drove like new.No hesitation from stop with A/C on.

After 15 minutes of pleasure, going up a slight slope at 80km/h, car started feeling like it was bogging down.

Felt like I was loosing power (or flooding).

When I cleared the slope, coming down the slope I could feel the familiar surging of the engine; and noticed that car started to smoke (running rich).

At a stop light, when accelerating, car hesitated severely, and surged while accelerating, still smoking.

What gives?

I stop the car, pull off the EHA and leaned my mixture till I got driveability back with the A/C on.

So now I'm back to square one.

I noticed however, that this problem of running rich seems to happen when the car is warm (with the EHA off - to exclude the electronics from the equation; pure mechanical injection).

Normally, the car is very driveable when first started; albeit hardstart (coz EHA is off).

Could any of the sensors affect the mechanical injection with the EHA off?Don't think so but I'm not sure.

Any ideas?

HELP!!!