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Need Help With Coil Pack Problem

01kings10

By 01kings10,
in Australian Capital Territory

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01kings10 Explorer

01kings10

Posted
Posted

Hey everyone!

My R33 GTS-T S2 has been having a coil pack problem lately :(

For some reason it keeps blowing one coil pack, which is coil pack number 4 - the one that sits directly under the crossover pipe.

I have spare original coil packs and when I replace it drives perfect for about 10 minutes then it starts to misfire again!?!?

Does anyone here know what could be causing this?

Would really appreciate any sort of help :)

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StinkyPoo Mentor

StinkyPoo

Posted
Posted

Oil? Is the coilpack insulator degraded? Any loose conductive objects around?

A way to test is to run the car at night or in a dark garage, have a look at the coil packs and see if you can see it earthing out.

01kings10 Explorer

01kings10

Posted
  • Author
Posted

Oil? Is the coilpack insulator degraded? Any loose conductive objects around?

A way to test is to run the car at night or in a dark garage, have a look at the coil packs and see if you can see it earthing out.

What do you mean by oil?

Coilpack insulator is fine, no loose conductive objects anywhere. I have removed the spark valley cover but I doubt that has anything to do with the problem.

What do you see if the coilpack is earthing out?

Thanks heaps :)

StinkyPoo Mentor

StinkyPoo

Posted
Posted

Whoops, I must have been half asleep when I wrote that post.

Check to see if there is any oil around the coil packs, either from a bad cam cover gasket or something else. If there is oil, or even water it can cause the spark to jump away from the plug.

You'll see sparks from the coils earthing out to what ever they are earthing too. It is a common problem with coilpacks.

01kings10 Explorer

01kings10

Posted
  • Author
Posted

I've cleaned up the area around the coil pack/spark plug as much as I can.

There's no sparks as far as I can see but then again I'm not sure where exactly I'm supposed to be looking.

Problem still persists :( not sure what else it could be?

I'll give anyone $60 if they can help me fix the problem? not much but I'm a poor student. Can bring my car to you.

Where else would be ideal to take the car to that won't break my bank?

01kings10 Explorer

01kings10

Posted
  • Author
Posted

What's the condition of the spark plug underneath that coil pack?

It's a 2 month old platinum plug.

Try wrapping them in electrical tape?

I had a read of ones which showed signs of slight cracks in them and wrapping in tape helped with the misfire.

A long shot but hey if it saves you money why not

The coil packs have already been sealed with that high-temp silicone stuff.

Sinista32 Grand Master

Sinista32

Posted
Posted

Thinking out loud.

1. Swap coilpacks and loom over with another 33 to test and If thats the issue

2. Bite the bullet and buy new Splitfire coilpack. If not then nothing spent nothing gained.

Then you can rule that out and move on throuogh the process of elimination.

Woops sorry - you say you keep blowing the same coil pack #4.

They obviously run 12v. Perhaps it's just your loom. Maybe it is best then to replace it all. The first test will identify this.

You say The coil packs have already been sealed with that high-temp silicone stuff.

Well that would indicate it's had an issue!

01kings10 Explorer

01kings10

Posted
  • Author
Posted

Thinking out loud.

1. Swap coilpacks and loom over with another 33 to test and If thats the issue

2. Bite the bullet and buy new Splitfire coilpack. If not then nothing spent nothing gained.

Then you can rule that out and move on throuogh the process of elimination.

Woops sorry - you say you keep blowing the same coil pack #4.

They obviously run 12v. Perhaps it's just your loom. Maybe it is best then to replace it all. The first test will identify this.

You say The coil packs have already been sealed with that high-temp silicone stuff.

Well that would indicate it's had an issue!

The silicone around the coilpacks doesn't explain why they work for 5 mins then fail. I have been thinking of buying splitfires but I have a strong feeling that it might do the same thing.

Fouled plugs can cause coils to overheat and die

Swap the plug for another and see if it misses on the different cylinder

I'll try this :)

Is it really worth spending $100 on something that might not even be the problem?

Sinista32 Grand Master

Sinista32

Posted
Posted

Why would 2 month old platinum plugs be fouled? Especially 1 of 6. If thats is the case then you have another more expensive problem.

I wouldn't just buy a loom for the sake of it - "Swap coilpacks and loom over with another 33 to test and see If thats the issue"

You say that number 4 fails after coil pack has been replaced.Why couldnt it be the loom then.

The point of mentioning the silicon is that either you or the previous owner had a problem. The 5 minute timeframe before it happens could be contributed to heat generated by running for that period of time and the expansion that will occur.

Anywho - all just theory from me.

01kings10 Explorer

01kings10

Posted
  • Author
Posted

Why would 2 month old platinum plugs be fouled? Especially 1 of 6. If thats is the case then you have another more expensive problem.

I wouldn't just buy a loom for the sake of it - "Swap coilpacks and loom over with another 33 to test and see If thats the issue"

You say that number 4 fails after coil pack has been replaced.Why couldnt it be the loom then.

The point of mentioning the silicon is that either you or the previous owner had a problem. The 5 minute timeframe before it happens could be contributed to heat generated by running for that period of time and the expansion that will occur.

Anywho - all just theory from me.

Yeah I'm fairly sure it isn't the spark plug that's causing the coil packs to fail.

I'll take your advice and go buy a loom tomorrow and see if that will work (found a local one).

Can't be a bad coil pack problem as they do work fine when I try them in all the other cylinders.

Thanks :)

01kings10 Explorer

01kings10

Posted
  • Author
Posted

So have you swapped the coil pack loom out.

Also have a look in the I can lend you thread if you need more stock coilpacks.

Swapped the coil pack loom today with a $50 one from JapSpec, problem seems to be fixed!

Thanks heaps for helping everyone :)

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