It's an 89 740 gl wagon, B230F automatic, with about 315000 miles. A year or so ago, the mileage dropped from a constant 29 mpg to about 22, with a drop in power & responsiveness, and it gradually began to require more cranking to start. The idle slowed down, and didn't high-idle at startup. I replaced the plugs,wires,dist.cap&rotor, both fuel pumps and fuel filter, with no improvement. Time to replace the timing belt, and did, along with the tensioner. Then one morning, about 10000 miles later, it died & wouldn't restart. It had a code for the ECT which I replaced, stopping that code, and sometimes one for the AMM, and I cleaned the connections, which stopped thatcode. I replaced the fuel filter, checked the O2 sensor with a meter that has a min/max memory. Cleaned the injectors & replaced the seals on them. Checked and rechecked the cam/crank timing (thought I might have the cam off by a tooth or so.) Checked the coil, ok. Checked just about everything. It would start then, but only after being shot with starting fluid, which worked best in the vac. line to the FPR. Finally, found that corrosion under the bolts that hold the fuel rail down was interfering with grounding the injectors, and wire-brushed them. Then it would start, but with difficulty - quite a bit of cranking and trying to get the gas pedal in the right position. I also again replaced the fuel filter, cleaned the throttle body, and checked the voltage. Disconnecting the AMM causes it to die. When it's idling in neutral it will rev up rather slowly, but in gear, when I step on the gas, it doesn't rev up. IT may backfire once, but that's all. Yesterday I removed the cold-start injector and soaked it Chemtool B12, and it does idle a bit faster now, at about 800. I adjusted the kickdown cable and the TPS. What gives?