Installed New Coil Packs Now Car Hesitates

[DaGr81]

As topic states

took the time to change my coil packs today (car is r33 s2 rb25de with turbo conversion etc etc)

first off I took out old coil packs and inspected them - they have no cracks or marks on them and were in great condition - I know my plugs are gapped to something but that shouldn't be a problem for the time being. Anyway new coil packs didn't line up with the holes to screw them in the top 2 holes line up but the bottom one never did, so I screwed them in using the top 2 holes nice and tight. Plugged everything up and put everything back together and started her up.

It started first go only the car was shaking like a b!tch (gear stick shaking quite alot and like being inside a vibrator lol) so I thought I'll give it a run around the block to see what's going on. Around the block I go and she hesitated to get on boost and wasn't running well at home - pissed me off changing these things in rb25s is back breaking work. Anyhow un did everything and put the Nissan coils back in, everything returns to normal - no hesitation no shaking.

Any mechanical gurus here care to help identify what the problem may be?

[tridentt150v]

wrong coils for the motor you have, some need an ignitor box, some don't

[DaGr81]

I see, ordered series 2 coil packs though and that's what it said on the box looks exactly the same - unless my car had a different engine put in in japan... Hmmm

well I've got another set delivered already so I'll try that if not I guess I'll be trying series 1 coil packs

[geraus]

LOL @ your post heading LOL, hahahahah . Try the series 1 coil packs.. because the ignitor moudle is diffrent to the series II.

[bubba]

Does your engine have a little rectangular box at the back of the valley cover?

[PM-R33]

What he said^

What year is the car?

[dori34]

what brand coilpacks did you get?

[tridentt150v]

A 'de' RB25 may not take the same coils or have the same loom as a 'det', the spark needed for forced induction has to be stronger otherwise it gets blown out.

Do your originals look like the aftermarket ones? Do they have the same shape and size?

And if the mounting holes don't line up properly [as you stated] then I'd say that is a dead giveaway, I have a SII and installed splitfires and the mounting holes lined up exactly, no bodgy fit up required.

[DaGr81]

Ontop of the valley cover there's no igniter module (rectangular box) there is a connector plug on there though which is hooked up to wires I dunno what for and screwed into the valley cover using a piece of metal which is stopping it from moving around. The holes line up 98% just slightly out enough so 3 of them can't be screwed properly while 3 can be (I assumed because of china) - they are yellow jackets (paul I believe his name is) has been great and has really gone out of his way to help me on this and I do believe they are a great product from all results I've seen.

Anyhow it is a 1996 series 2 so all I did was follow what was on their website....

Will try series 1 coils after I send these 2 sets of series 2 ones back and will also take pic for you guys of the rear of valley cover tomorrow

[DaGr81]

And yeah they are same size shape and look exactly the same.

[d_liberate]

If you have no igniter module, and the car is a 96, and the coils look exactly the same, then you definitely have the series 2 engine.

Also, series 1 coils have the black mounting plate all the way around the coil whereas the series 2 doesnt, only on the ends.

These mounting plates look the same as the factory coils.

I had to learn this when I purchased some Yellow Jackets for my Series 1 about a year ago

Heres some pics where you can see the differences:

Series 2

Series 1

[Cjmartz2k]

Dude, it just sounds like to me for some reason one or coil packs aren't firing. When you consider you just swapped coil packs, you probably just didn't get one clipped on correctly, broke a part of the coil pack harness, or didn't get that ground at the back properly seated. Also maybe a couple of the coil packs are dead, but I doubt it.

[DaGr81]

I double checked all the clips it could be a dead coil pack anyhow when I spoke to Paul he made me go through and check each coil pack and from the looks of it they were fine. As people have said could be me needing series 1 coil packs because life started as N/A

[d_liberate]

The coil packs are the same for the turbo'd & NA models. They are interchangeable and can be used in the R34 GTR.

Same situation with the Series 1 coils which can also be used in the RB20DE(T) and the R32/R33 GTR.

Edited October 21, 2009 by d_liberate

[Nismo_God]

....u've been inside a vibrator?!?!?!

[DaGr81]

^^ yes - haven't you?

[DaGr81]

I haven't taken pics yet but the rocker covers (and the wire I'm talking about) are exactly the same as whiteprincess diy on rocker cover gaskets - the little connector plug you can see in the 3rd or 4th pic

[gotRICE?]

Have a quick look at the inside if the plug on the loom on all of the plugs.

I somehow managed to bend two pins on mine a few weeks back. Plug wouldnt clip shut, and i thought id broken the plastic clip. So proceeded to buy another loom to replace it and when i went to do it, i had a close look with a torch (the garage my car is in is dark hence missing it at the start) and found two were bent. Straightened them with a key and away it went.

But when they were bent and the plug wasnt clipping shut it was like you described. Got me moist.

[DaGr81]

LOL...i see but if the pins were bent once i put the original nissan ones back in it would do the same vibration thingy, but it didnt so it worked fine, anyhow i will install the new set tomorrow sometime and see how it goes...

[gotRICE?]

Nah if it went away when you put the Nissan ones back in then theres a problem with the packs.

You could also try having the aftermarket ones installed, then swap them out one a time with the Nissan one until it runs smooth. Then you've found the problematic pack.