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Re: I think I broke my car.
The EGR is not supposed to be open under full accel. It is only supposed to be open at steady cruising. Having it open under accel would drastically reduce the power output of the engine.
It sounds to me like you have a misfire. The fact that it was raining at the time leads me to suspect a bad plug wire or something like that. If you have a misfire that the ECM hasn't picked up yet, it could throw O2 sensor codes and EGR codes. The O2 sensors will see the big gulp of air that the engine took and didn't fire, and think it is running very lean. The change on the vacuum reading in the intake when it misfires could be misinterpreted by the ECM as the EGR being open, since it calculates EGR flow based on manifold vacuum.
The first thing I would do to it is plugs and wires and see if that helps it at all.
Mike
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MY TOYS
95 SVX
98 Lincoln MarkVIII LSC, 5-speed swap
91 Marcury Cougar, 393" stroker, completely insane!
89 Mercury Cougar XR7, supercharged V6/5-speed, one of 2209. Engine currently dead, replacement in garage being rebuilt.
80 Pontiac Firebird formula, 350TPI swapped in, car needs to be finished.
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