Misfires & coil packs & spark plugs

[skidz]

Originally Posted by BMWRX

I'm getting misfires when under load (ie fourth gear, 80km/h, foot down). High revs are fine. The plugs are about 10,000km old, coils 5,000km. Could it be the HPFP?

It has misfired on cylinders 6 and then 5 when it does throw a code. However mostly it doesn't register a code so it's getting frustrating working it out. I'm running a JB4 with Map 5.

log it and send the file to Terry, he'll sort ya out ASAP

[_Ryan_]

Originally Posted by Karmic Man

Looks like the higher boost and higher temperature from a tune are stressing the weak stock coil and plugs to an early failure...there seems to be no collection of data on how long a new set of stock coils and plugs will last on a tuned N54...

It's common on RBxxDET/T powered Nissans(as I'm sure advan can confirm). Stress less, they're a relatively cheap consumable.

[froop]

Originally Posted by Ian///M

Compared BMW vs Bosch today. They are not the same! Both are new

How did no one pick up on this before? I wonder what the difference in materials.

[Moocow]

Replaced my faulty coil, all is good again!!!! No more misfire engine codes!!!
Thanks Stu!

Installed OCC while I was at it.

[drjekl]

I noticed when i had my new bmw plugs vs the bosch items that the electodes were a different colour, thus possibly indicating use of a different material also...

[flinchy]

Originally Posted by skycat

I have a box of about 150 help your self $5 each take a punt

Damn, pushed out by the big guys

[BRR]

At 107k miles on the odometer I finally blew out ignition coils four and six. Ran seafoam and forgot to switch my jb4 from map two to map five. Got on the freeway and instantly developed two misfires. Luckily I made it home (very embarrassed). Seafoam decreases octane levels thus on aggressive maps the coils are trying so hard to ignite fuel that they can blow. Anyway I decided to replace all spark plugs and coil packs and my 135i is running like a dream.
Out with the old and in with the new.

[GuamX1]

Originally Posted by Stuart@BMRAutowerkes

Bosch will do just fine.

ECS even say that the Genuine BMW ones are Bosch Part number xxx

Matt if you need them I can send you 6 Bosch plugs for $100 and a coil pack for $60, add $10-13 for postage depending on number of coils ordered.

Good deal! An old post

[sliderpass]

Mine has developed a not nice misfire.. 2nd gear is no problems, when it loads up in 3rd, and low RPM full throttle in 3-4-5-6th misses pretty bad..

Is there anywhere in Sydney to get the BMW plugs cheap?

[dh58]

Originally Posted by sliderpass

Mine has developed a not nice misfire.. 2nd gear is no problems, when it loads up in 3rd, and low RPM full throttle in 3-4-5-6th misses pretty bad..

Is there anywhere in Sydney to get the BMW plugs cheap?

No where in Sydney will have 'cheap' plugs. You'll be paying for convenience. Advan or BMR will have them. BMR has a site too.