Intermittent Injector failure, starts @ 900 then drops to 400 rpm
Have Replaced all plugs, wires, distributor cap, which for one day fixed the problem. I have read that the ECM(ECU) can affect injector output, the injector appears to be ok. Does the knock sensor directly affect injectors causing shut down? Is it possible for the ECM to malfunction causing mixed injector voltage outputs, causing a intermittent missfire? I just spent $500 on a mechanic to find the problem, he said it was bad wires, and now im writing you guys, plz help!
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The engine coolant temperature is high. Your other Codes are for missing cylinders on cylinder 1,2,3,and 4. Get the Codes cleared and start over. Changing the plugs and wires,etc could have generated the missing cylinder Codes.
Autozone,Advance, and Oreilys will scan for free.
Check your engine for an IDLE SPEED CONTROL SOLENOID, which may be in the intake. Or a fuel pressure regulator.
A lot of times people work on the spark side and forget the fuel injectors. They can cause a miss.
Have you "reset" the computer on the car. When parts are replaced, the comp continues to run the vehicle on all the old settings which can drive you nuts because nothing you do will fix a problem. Usually, taking both battery cables off and waiting for 15 minutes will reset the computer. If this does not do it, then ask a dealer how to reset yours.
How about the pick up coil in the distributor? A trick we used to use back in the day was to tap the distributor housing with a hammer, key word tap. If the engine missed or stalled than the pick-up coil was replaced.
Re-check the basics . Does the distributor rotor rotate while cranking?Note: Distributer cap must be removed. Does the vehicle have enough available spark to plugs? Do we have enough fuel pressure 30-35psi min.? With a 12volt test lamp
check for power to fuel injector while cranking. one wire should
remain lit and the other one should blink.
NO ROTOR ROTATION = worn distributor gear,or timing belt failure.
NO SPARK= bad module,coil,no voltage to coil,or faulty PCM
you must loosen the bolt they hold the distributor down to advance turn counter clockwise when it runs right lock it in place.clear all the codes and start over sounds like alot of them codes are from the past it may still need a coil pack ,disconnect the battery wait 3mins hook it back up and try it hope this helps