My 740 has developed a problem. The engine acts like it is running on two cylinders and has no power. Also the tach will not operate. I have replaced the flywheel sensor, the plug wires, the spark plugs, timing belt, fuel injection relay, the fuel regulator, the fuel injection ECU, fuel pump, temperature sensor, etc. The fuel injection system is a Bendix/Semmens and the ignition system is a Regina. The car also has 165,000 miles and most of the parts replaced while worn out were very close to being worn out. Anyone know whats wrong.
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