I recently bought a '85 toyota extended cab pickup and it has a problem. It will not start on its own. If I spray carb. cleaner in the throtle body it will start and run as long as I keep the idle up. It is not getting an injector pulse while cranking to start but once it starts from the carb. cleaner I begin getting the pulse and it continues until it idles down and dies. Any ideas? I have already changed ECU and taken an ohm meter to all the relays the manual said to.