2G Are ignition coils interchangeable?

[Spades]

Are the 1-4 coils interchangeable with the 2-3 coils? Im getting a P0301 code, ive swapped plugs around and changed out the wires and still getting the same code. Thinking coils but dont want to make a purchase without ensuring its the coils. My question is, would i have a code P0304 for cyl 4 as well since they share coils? If not the coils, i will look into the ignition module next

 

[Spades]

changed out the ignition module and no change. I did swap to 660cc injectors a few months ago so maybe theyre defective. This weekend ill swap injectors or maybe go back to my 560cc, test cam and crank sensors.

 

[doubleclutch]

Yes, the coils are interchangeable.

you could also check the power transistor. There is a good thread on how to do that on here somewhere.

I don't think I would worry about the Cam and Crank sensors. if the crank was bad it shouldn't fire at all. I don't believe the cam sensor has anything to do with spark.

 

[Spades]

The power transistor is sometimes referred to as ignition module, already did that. The cam sensor has to do with the timing of the spark. I do believe that if they fail the car wouldnt run at all and not be specific to Cyl #1, but im trying to cover all basis as ive read that they can contribute to cyl misfires

 

[doubleclutch]

Any updates?

I had an issue where the car would drop a cylinder randomly. Turned out to be the ECU. HAd issues with cracked spark plugs as well. But you already did that. What plugs are you running?

 

[Spades]

Over the weekend i swapped #1 with #4 injector. I also swapped the coils. The CEL hasnt come back on yet. Ill see in the next few days

 

[second_amendment]

check your crank positioning sensor. might be going bad or dirty.

 

[Spades]

Well ive been driving it for a week now and the CEL hasnt come back on. It has never lasted this long without getting a CEL. I havent made any corrections, just swapped parts around to see if it moves to another cyl. I should note that when i was checking the injector resistance on Cyl #1 the reading was quite jumpy, i repeated the test over & over again thinking maybe it was the contact of my probes and shaking of my hands, but eventually got it to settle, and then i repeated it still several more times and was still jumpy some of the times. Im thinking i have a bad internal contact with the injector, but for now has a good solid contact after i wiggled it around during testing.

 

[doubleclutch]

Good to here man. Hopefully the CEL light is gone for good.