Intermittent spark related problem - need your help

[Davezj]

yes your right adam, and section 16 page 38 give the coil pack resistance value that alan was talking about 9k-13K Ohms for the a 6A1 engine the N/A 2.5 V6 so it looks like alan has 2 vr4 coil packs and 1 n/a V6 coil pack fitted now.

[adaxo]

it looks like alan has 2 vr4 coil packs and 1 n/a V6 coil pack fitted now.

Dave 6A13 non turbo coils is completely different shape to VR4 ones, what I trying to point that is not possible to fit 6A13 n/a coils on to 6A13 TT, very similar coils to vr4 ones are from 2.0 4G63 engine.

here is how 2.5 n/a coil looks like




and here is 2.0 4G63 coil

[Davezj]

point taken adam,
the workshop manual is a bit misleading on this page, it shows a detailed picture of the coil in the bottom picture in you post on that page and refers to the 4G6 engine describes the measurements but not an HV terminal measurement and then goes on to describe the checking of the 6A1 engine and specifies the hv terminal measurment of 9K-13K Ohms reading with a really dodge picture of the coil in the top picture in you post.
they are 2 completely different check for 2 completely different HV coils.

So the odd coil pack alan has is infact one of 2 things it could be a 2.0L 4G6 coil pack, if it has a resistance reading of 9.7K Ohms and works OK or it is a duff 6A13 coil pack with a different style plastic case and a resistance reading which is low and out of range.

[adaxo]

So the odd coil pack alan has is infact one of 2 things it could be a 2.0L 4G6 coil pack, if it has a resistance reading of 9.7K Ohms and works OK or it is a duff 6A13 coil pack with a different style plastic case and a resistance reading which is low and out of range.

IMO it could be slight difference between FL/PFL coil shape, can any vr4 breaker confirm that?? or may its worth to start a new thread?? we messed up this one already, sorry Alan.

[apeman69]

Carry on because, at the moment, I think I've got the wrong coil on: different shape and resistance (assuming I'm measuring it correctly) and the elec plug was noticably tighter to get on. I, like Dave, think I may have a 4G63 one on (though your pic does look a little different) with 2 x 6A13s.
I didn't check the PDFs on here properly: just saw 'Galant' then 6A1 and thought I'd found what I was looking for

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[Nick Mann]

Is it only the 6A13TT that has coil packs? Or does any of the versions of the 6A12 have them too?

I have never noticed a difference in coil pack design on VR4's, but then I have never had lots in a box to look at, only ever three at a time from the same engine.

[apeman69]

Whatever I have has the same mounting points as VR-4 ones. These look different to the pic of the 4G63 coil.
Nutter John where are you?

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[adaxo]

GDI coil looks similar too

[apeman69]

FTO coil looks like it has the same offset mounting points but I can't find a decent pic of the top to compare the shape. I'll have a search to see if I can find a match on resistance.
If I get time tomorrow I'll take it off the car and scrutinise it for any part numbers/reference codes.

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[apeman69]

Does anyone know if a N/A coil (generally and not necessarily Mitsy) would have a secondary resistance around 10 Kohm and do turboed ones normally show a much higher value. I'm trying to get a feeling for whether this one may be off a N/A vehicle.

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[Davezj]

hi alan,
i have put my 3 spare coil pack on my car to test them and all seems OK. so that is good, idles nicely and WOT is good no misses or anything.

but when i took mine off i noticed one of my coil packs had a different shape (never noticed it before) but it looks like your odd shaped one in you first post 3rd pic. so i measure the output resistance of the odd one between the outputs and guess what it was 10.1K Ohms.
so i am in the same situation as you alan,
2x6A13TT coil pack
1x4G6 coil pack (potenrially)

i will still send you the set of 3 good 6A13TT coil packs, but i will need one back to replace the odd one i have. maybe this odd coil pack could have something to do with my bad MPG, possibly having a week spark on 2 cylinders would give worse mpg, well that would be my guess but only time will tell.

the missmatched coil pack were the on the car when i bought it, but apart from the alway low mpg i have not noticed any issues with the running of my car in general.

[adaxo]

hi alan,
i have put my 3 spare coil pack on my car to test them and all seems OK. so that is good, idles nicely and WOT is good no misses or anything.

but when i took mine off i noticed one of my coil packs had a different shape (never noticed it before) but it looks like your odd shaped one in you first post 3rd pic. so i measure the output resistance of the odd one between the outputs and guess what it was 10.1K Ohms.
so i am in the same situation as you alan,
2x6A13TT coil pack
1x4G6 coil pack (potenrially)

i will still send you the set of 3 good 6A13TT coil packs, but i will need one back to replace the odd one i have. maybe this odd coil pack could have something to do with my bad MPG, possibly having a week spark on 2 cylinders would give worse mpg, well that would be my guess but only time will tell.

the missmatched coil pack were the on the car when i bought it, but apart from the alway low mpg i have not noticed any issues with the running of my car in general.

DAVE

[apeman69]

Dave, potentially 2 of mine could be good so keep 1 for yourself. I may only need 1 in the end.

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[Davezj]

as I say I can still send all 3 so you have a clean start point.
E.g. Swap all 3 to start with and if all is ok then start swapping coil packs to verify the failed one.
But if your problem is still there after changing all 3 coil pack there you will have to start looking else ware for the cause.

When you start changing the coil packs I would suggest you swap all of them, problem goes away.
Then swap one of your original coil pack back in, test it, if still ok, swap another one in, if still ok, put your last coil pack back in to prove the issue comes back. As long as the issue comes back then you can say the last coil pack was casuing you the issue, and swap one of mine back in to fix the issue.

I do not need the remaining coil pack back in am hurry so take you time doing the testing and ensure you get the correct result.

[Davezj]

I have sent 3 coil pack today Alan, royal mail standard parcel, so they should be with you on a couple of days.
Have fun.

[Davezj]

DAVE

Check out the third pic in the first post, the difference is highlighted there.

[Davezj]

FTO coil looks like it has the same offset mounting points but I can't find a decent pic of the top to compare the shape. I'll have a search to see if I can find a match on resistance.
If I get time tomorrow I'll take it off the car and scrutinise it for any part numbers/reference codes.

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Hi Alan,
I forgot to say the 2 different designs of coil pack do have a different number on the side but I forgot to make a not of it when I swapped mine over. It looked like a manufacturer number rather than a mitsi part number.
The vr4 ones had diamond written on the side the other did not, it could have been a batch number but the format of the number was different.
Bugger I knew I should have written it down.
You will be able to see the different numbers when you remove yours.
I put a *I, *II, *III on the coil pack I sent you just so you know which ones are ok and the positions I tested them in, I left, II middle, III right.
Not that it really makes any difference.

[jjayokocha]

problems you are having sound very similar to mine, irecently changed my plugs but still having the boxer sound on idle plus am getting an odd noise coming onto boost with a bit of hesitation but clears once it hits 3k

[apeman69]

The coil I took off today has no markings other than FL0165 0328
A quick googling has a mention of FL0165 being a replacement for MD363548 (Russian site). I can't trace the mitsy part number though

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[adaxo]

ASA say that in my car coil is MD323928 old and replaced by MD363547 may you can try this numbers