R34 Coil Fail Help

[laanyy]

Okay guys so the coils are failing in my R34 GT rb25de again. Had this problem twice now.

First time we ran the motor and removed each coil doing the usual test to find the miss. No luck considering it rarely missed on idle anyway. We ended replacing all 6 however but I can't remember the brand and that seemed to fix the problem.

Anyway its now happening again yet more frequently. Seems to be triggered by being under load up hills more often than anything. Rarely on idle. Have ran the same tests on the coils with no luck.

Have seen that it could possibly be the loom, and I have heard the loom can be just as much of a pain to test due to its intermittent nature as well.

So basically I need to get the car back to 100 % asap. So I'm thinking of just completely replacing, spark plugs, coil packs and the loom. My question is, by just replacing everything, am I prolonging the inevitable miss again. Or will it be a safe fix for some time?

Cheers guys.

[laanyy]

And also when is the timing belt due on a r34 25gt. 2001

[BuuBox]

Timing belt is due every 100,000 kms. If you can't verify the odometer, replace sooner rather than later.

How long ago were the coil packs changed? What spark plugs were used? You may just need to change the plugs if it's been say 30,000 kms and you used copper plugs.

If not, stick with OEM or Splitfire coil packs and you should get 10 to 15 years out of them (i.e. stock coil pack life). Loom issue would be constant IMO, and you'll know if you need a new loom - brittle plugs, will be falling apart, etc.

[Ben C34]

Considering the original coils lasted 13 years it would be safe safe to say that new original coils will outlast the car.

Timing belt 100,000 ks. Actual ks. Not what's on your speedo.

Basically if it hasn't been done do the belt.