Dropping Cylinder

[black33gtst]

Hi All,

Have a series 1 r33 GTST, recently had a second hand engine fitted all running well. Problem i have is witht the previous engine i started to experience an intermittent problem i.e on occasions when you started the car it ran like it wasnt firing on a cylinder, sometimes a simple restart would rectify and all would run smooth sometimes it just wouldnt run smooth for the whole day. Anyway that engine is gone and had new engine in for almost 8 months now never had a problem, in the last week or so it appears to be doing the same thing again start up she sounds like it has dropped a cylinder but this time i just restart and problem goes away, am worried problem will get progressively worse till its same as before.

Anyone have an idea as to what is causing this

[Krishy]

did your mechanics tell you why you needed to replace the engine....and did they tell you what the problem was...if they did then obiviously its not the motor but could be the ecu, afm, sensors a lot of things timming for example....so just take it to an import specialist and they should be able to tell you whats going on

[limpus]

So many things could be causing it...main culprits are usually the coilpacks...ignitor...coilpack loom...then there are other possible causes like the CAS and so on...when the other engine went in...d you re-use any bits off the old engine?

[black33gtst]

other engine was replaced due to a so called "TUNING SHOP" in brisbane blowing my turbo and destroying number 2 cylinder after 16 runs on a dyno.

parts used from old engine were all harnesses and coil packs

[limpus]

Then i'd look at the coilpack and harness and ignitor as well first...because i went through the same problem...and it turned out to be a dodgy coilpack connector...

[black33gtst]

Limpus i was suspecting it was something to do with the coil harness, any idea how you test it or if you can purchase new ones?

also where do you get new ignitor?

thanks mate

[Aif]

you can get them from Nissan or opt for a second hand part but it could also be shagged. if u know anyone with the same model car try swaping the ignitor then the coils and see if the problem is still there (then again u said this doesnt always happen)

best of luck mate,

AiF

[black33gtst]

you can get them from Nissan or opt for a second hand part but it could also be shagged. if u know anyone with the same model car try swaping the ignitor then the coils and see if the problem is still there (then again u said this doesnt always happen)

best of luck mate,

AiF

Have swapped around coil packs while it had old engine in always remained missing on number 4 cylinder tried another ignitor same probs sounding like it is most likely the harness.

Anyone know where you can get a new harness or is it possible to repair the old one?

[limpus]

Well...it might not be the case for you but it certainly was for me...after spending money on new coilpacks and a used ignitor i would still have that problem...then one day while it was happening i decided to unplug each coil one by one and found the dodgy connector on my loom...

[black33gtst]

limpus by dodgy connector what do you mean it was cracked suss wire?

how did you fix?

[black33gtst]

anyone know how to fix the coil loom?

[limpus]

Well...best way is to swap the loom if it indeed is the loom...for me i just pushed the connector in properly and held it in place with wire...looking for another loom now...