How about trying to adjust your CO. It's the little tower next to your fuel distributor. You will need a long 3mm allen wrench to do this. With the car running, push down GENTLY and turn it about a quarter turn clockwise. You will feel spring tension as pressure is applied, but it will bottom out. If you push too hard, the car will stall. Just remember, a little turn goes a long way. Also, check your overvoltage protection relay. It is a little silver box next to your firewall. There will be a 10 Amp fuse in it. If it is blown, you will experience the exact symptom of which you speak of. Last, but not least, buy a BMW and wave bye-bye to inefficient CIS-E injection!