Oh Ohh Spaghetti'os!

[JustinP]

My car has recently started occasionally misfiring when I accelerate hard, I am assuming it’s the coil packs, but could it be anything else? Car is a 98 R34 with about 85,000ks, running about 12psi, PFC, etc.

Also in the last few months, the fuel consumption has gone from awful (about 330k's a tank, not thrashing it), to absolutely awful (about 260k's per tank, also driving fairly sedately). Would this be a symptom of failing coil packs?

If so looks like I should order some Spitfires.

Thanks

[Guilt-Toy]

Go to repco or a auto parts store.

Buy a set of NGK Coppers BCPR7ES which are gapped to .8

Install. re-test.

[R33GOD]

close the gap on your sparkplugs to .8mm. see if that helps. or if there stuffed replace them

should be fine

[JustinP]

Thanks guys, that could be the problem as I have not actually changed them before! (got the car with 64,000k's). If they are dead it will be a lot better than having to fork out $500 for the Splitfires.

Would it be possible that the spark plugs have been causing the fuel economy to become so much worse?

[R33GOD]

Thanks guys, that could be the problem as I have not actually changed them before! (got the car with 64,000k's). If they are dead it will be a lot better than having to fork out $500 for the Splitfires.

Would it be possible that the spark plugs have been causing the fuel economy to become so much worse?

yes