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The Crank sensor only just tells the ECM what to put the spark to for timing. If it works it works; if it doesn't your engine usually won't even start or runs intermittent. The Knock sensor tells the ECM what to advance the spark timing depending on how hot the engine is and what load it is under. (Protects the engine from detonation) \\
Check the Knock sensor by hitting it with a light tap (hammer) to see if it registers a voltage. You neeed to remove it first to check this. Theres also a check engine terminal under the engine fuse compartment on the passenger side. Put your voltage meter to it and ground it to the engine to see a reading with the engine running. The best best way to test the knock sensor is to remove it from the vehicle. If it gives you between 1.5 -4 volts under the tap it should be ok if not try checking the wiring to it. Use a ohm meter to check for continuity of the circuit. The knock sensor is one wire that goes directly the ECM.
The only other problem you could have is bad fuel delivery.
If you have new coils, a new ICM and plugs and wires then it's either the sensors like I mentioned or a bad injector.
Bad injectors don't usually show trouble unless the engine is under heavy load unless their trigger signal from the ECM is not getting to them.
If all else fails pull the plenum and have the injectors checked by a shop which requires their complwete removal (last resort). Normally injectors can be heard clicking on and off if their working. You can check # 2 # 4 and #6 injectors from under the DOHC cover. Put a screw driver on the top of the injector and put your ear on the end to hear the clicking if its costant your injectors are probably fine if thats the bad cylinder.
The Crank sensor only just tells the ECM what to put the spark to for timing. If it works it works; if it doesn't your engine usually won't even start or runs intermittent. The Knock sensor tells the ECM what to advance the spark timing depending on how hot the engine is and what load it is under. (Protects the engine from detonation) \\
Check the Knock sensor by hitting it with a light tap (hammer) to see if it registers a voltage. You neeed to remove it first to check this. Theres also a check engine terminal under the engine fuse compartment on the passenger side. Put your voltage meter to it and ground it to the engine to see a reading with the engine running. The best best way to test the knock sensor is to remove it from the vehicle. If it gives you between 1.5 -4 volts under the tap it should be ok if not try checking the wiring to it. Use a ohm meter to check for continuity of the circuit. The knock sensor is one wire that goes directly the ECM.
The only other problem you could have is bad fuel delivery.
If you have new coils, a new ICM and plugs and wires then it's either the sensors like I mentioned or a bad injector.
Bad injectors don't usually show trouble unless the engine is under heavy load unless their trigger signal from the ECM is not getting to them.
If all else fails pull the plenum and have the injectors checked by a shop which requires their complwete removal (last resort). Normally injectors can be heard clicking on and off if their working. You can check # 2 # 4 and #6 injectors from under the DOHC cover. Put a screw driver on the top of the injector and put your ear on the end to hear the clicking if its costant your injectors are probably fine if thats the bad cylinder.
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