I have a B16-a in a '91 CRX that has run flawlessly since I shoehorned it in two and a half years ago, well up until about 2 weeks ago. Then it started leaning out when I'd let out of the gas for any length of time. This progressed to leaning out when running with a consistent throttle postition; ie. level ground. Now it leans out and dies or tries to any time the throttle is opened.

Here's what I've done so far:

I installed a new fuel pump, fuel filter and changed the fuel regulator valve. I've also taken off the TB and inspected it and all the vacum lines.

The last mod I've made to the car was about 8 months ago I replaced the alternator and while it was down, I added a MSD ignition, coil and dist. cap. After these mods were made, the idiot light for voltage has been on but the battery has stayed charged.

Could this be a ECU problem or have I missed something else? Any help would be greatly appreciated.

Thanks in advance!