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1988 325i. new head, plugs, wires, water pump, rotor and cap, new injectors, new cranks shaft sensor(pulse sensor). car is very hard to start, and only fires on 2-4-6 cylinders. have spark at 1-3-5 but no fuel. checked pressure at rail and its 46lb, have continuity between ecu plug and injectors 1-3-5 but they are not opening. can hear 2-4-6 injectors tic but not 1-3-5. i figure its the ecu. what do you think
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This is something that you cannot afford to throw any more money at. Get a timing light to check to see if there is spark. Use a pressure guage to check fuel pump. Get bug lights to test injectors.
CKP sensor is located at front/lower of engine near crankshaft damper. Check for spark. Should blue with spark plug wire one half inch away from a good ground.
If one of the sensors is failing, you should be getting a check engine light and a trouble code. When you say it has fuel, do you have injector pulse and fuel pressure in the rail ?
Check compression and timing belt. If belt is ok and you have compression, check to see if you have a pulse at the injectors. You use a device called a NOID light (basically a light bulb that plugs into the injector plug. Unplug the injectors one by one and plug the light in then crank the engine. Light should blink on and off if the system is working properly. If not check for a bad crank sensor, blown injector fuse and wiring harness. Hope this helps.
running good --not a timing belt problem
possible a balance timing belt problem as that shaft has to timed correctly or it accentuates the engine pulse vibrations
run the fault codes and check for injector dirty problems
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