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coil packs?

ASYLUM

By ASYLUM,
in General Maintenance

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ASYLUM Community Regular

ASYLUM

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still having some trouble with my NA R33.

brief recap - had it for a year and ran great then suddenly started running really rough and belting out smoke from the exhaust, stalling on idle and dropping revs etc. used a heap of fuel.

put an aftermarket ECU in it and it resolved the worst of the problem, still threw out some smoke under hard acceleration and revved itself on idle etc would stall if i put the air con on. still used too much fuel

had a retune and adjust and seems better but now is stalling on cold start and still revs itself from 900-1100rpm, haven't tested the fuel tank yet but doesn't seem to have changed much.

i have been looking around the forums at similar problems and have noticed mention of coil packs popping up, some saying it is a common R33 problem with hairline cracks etc.

wondering - where they are? how much to fix/replace and what i can do to test if it is them or not?

any info is appreciated.

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ASYLUM Community Regular

ASYLUM

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not that i am aware of... where are the coil packs? what do they look like? if i can find them i will go ahead and wrap them or glue them.

pics or DIY?

SST tested pretty much everything on the car but i am trying ot think of what it could be, they said my O2 sensor was reading fine so i want to check the coil packs.

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xr8eater Experienced

xr8eater

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under the black cover screwed down by allen keys in the middle of your engine it says nissan 2500 on it they are under there you can then un screw them individualy or the whole lot deprnding on what bolts you un screw i will get some pics later if you are still haveing trobule

you will need to take some small hoses off and the intake pipe first

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Zahos Mentor

Zahos

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Once they have warmed up, you can test the resistance on them, OR

take it to nissan to plug it in and it should tell you.

For the first method, do a search, it is covered in detail.

taping or gluing doesn't really cost more than a few bucks. If it works, then you know they were the culprit to begin with.

Obviously new coils are the better option, but if you can save a few bucks, it is worth a try...

what does glueing or taping your coil packs do?

if the coils have a crack (which most do after X amount of km or years) then the spark can arc from the crack in the coil, onto the head, meaning you will get considerably less spark to your plug, and it will not ignite the fuel entirely. This causes misfire.

The coils being made of a thermo plastic, cant be plastic welded, so they need to be covered with some sort or epoxy that will stick. If you look at the back of each coil pack, they actually come covered with an epoxy, so using araldite (which is an epoxy) should be fine.

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ASYLUM Community Regular

ASYLUM

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under the black cover screwed down by allen keys in the middle of your engine it says nissan 2500 on it they are under there you can then un screw them individualy or the whole lot deprnding on what bolts you un screw i will get some pics later if you are still haveing trobule  

you will need to take some small hoses off and the intake pipe first

cheers for the info, pics would be a help but i'll take a look this weekend.

:)

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benm Grand Master

benm

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The araldite cost me about $12 and it took me about 4 days to do. I'd take 1 out, glue it up, put another spare coil in so i could still drive my car whilst leaving the other coil to dry for a solid 24hrs in the sun (if you put them back in any sooner the araldite glue will just drip all over everything so take your time and do 1 at a time).

/waiting on Splitfires from Nengun :cheers:

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