air flow meter

[redliner]

hi fellas,

my car was spluttering really bad , so i cleaned my afm with contact cleaner. the spluttering improved but is still there after 5000 revs. does this mean the problem is definetely the afm or should i have it tested. as i live in the country i do not know where to send it or where to buy a new one etc. etc

please help as i do not want to drive around and wreck my engine.

[performance-wise]

I wouldnt mind knowing the answer to your problem aswell.

I have a similar problem where I hit a certain rev range and the car splutters, a bit like hitting the rev limiter. I have a power fc installed and I havent adjusted any settings since having it tuned as I am not 100% sure of what Im doing.

Did a bit of research and apparently the HKS wet style filters are no good for your AFM sensor. I just changed from a HKS mushroom filter to an Apexi power intake and I havent cleaned the AFM yet. Still havent noticed a difference with the splutter though.

Happens on stock boost (7psi) at around 5000 - 5500rpm and on 9.6psi at around 4500 - 5000pm. Wondering, could it be the fuel pump? rev limiter setting?

Also, what type of contact cleaner is recommended?

Sorry for hijacking your thread.

[siksII]

might be the coilpacks

[performance-wise]

might be the coilpacks

When is it recommended to upgrade these?

[siksII]

when your car starts misfiring

if you gap the plugs to say 0.8 and it still misfires then they are definetly stuffed. the generally get worse at higher boost.

[ecl]

true

did u recently up the boost?

spark plugs might be on the way out or might need regapping to 0.8mm from the stock 1.1

if that doesnt work, try checking your coils for cracks

[performance-wise]

plugs are only about 10000km old (NGK iridiums to suit RB20DET - recommended by tuner??)

Had em installed the same time I got my power fc installed and tuned.

Had no problems then.

spluttering only started happening after I got a front mount and AVCR installed, upped the boost and re-tuned. On 9.6psi Ive got approx 200rwkw - is this maxing out my fuel pump and coil packs?

[siksII]

fuel pump should be ok

i am pretty sure that from what you describe it is the coils.

the coil packs dont really max out, they just die after a while. when mine died, the problem was much worse when the car was hot and i was running higher boost, like what has happened to u.

[Tommyk]

i would say the coils also

Both coilpacks screwed up on my 32 and 33 once i upped the boost. Go figure

[performance-wise]

Thanx for the info. I Hope this is usefull to redliner aswell.

Does installing new coil packs require tuning?

[siksII]

Thanx for the info. I Hope this is usefull to redliner aswell.

Does installing new coil packs require tuning?

no they plug straight and no tuning is required.