Im Told Ive Got A Missfire - Vid Inside.

[syx]

Hi Guys

Ive got a series '1.5' R33 (S1 engine) that about 6 months ago started having a missfire about 1% of the time and I would pull over and restart the car and it would fix it self.

Because it was so intermittent it took ages to get it to my mechanic while it was happening. I finally got it there while it was missfiring and he replaced the sparkplugs.

Didnt fix it and its slowly started happening more of the time until a few weeks ago its happening around half the time its going.

Took it back to my mechanic and he said coilpacks, so now its got splitfire coilpacks in it.

Didnt fix it.

To be fair I live in a country town and im fairly certain my car is the only skyline the mechanic works on.

Anyway i took a short 16 second vid, while you accelerate the engine it has an exhaust sound like a wrx instead of the normal smooth sound.

http://au.youtube.com/watch?v=hV68RI5Zhmw

(how do you embed the video here ?)

Thanks for any advice.

btw, its got a front mount, pfc, elec boost control, some other stuff and around 200kw.

[Guilt-Toy]

ohhh no a missfire ?? was anybody hurt?

[r33_racer]

loose injector plug? or perhaps faulty injector?

[sinstr]

Did mechanic regap your sparkplugs? After I installed my new sparkplugs I had all sorts of misses, after making sparkplug gap smaller the missfire was gone.

Something to try anyways, GL!

[tridentt150v]

I'd look at all the small things first before spending any more $$$, wiring, fuses, earth straps, coil loom, fuel pump wiring and fuel pressure, 0.8mm spark plug gap, clean AFM, O2 sensor, injector clean etc etc etc These things can drive you bats finding them.

Also try this: http://www.skylinesaustralia.com/forums/St...er-t233110.html

[tridentt150v]

ohhh no a missfire ?? was anybody hurt?

No they missed............

[BOZ22N]

Get a screw driver preferably one with a steel shaft all the way through and start your car. Then use the screw driver as a stethoscope and put the blade end on the top of the injector and use your hand as a cup and listen to the noise coming out the end of the screw driver. Make sure that all your injectors are making the same level and pitch of click, ( if you know what i mean).

This will be very hard if you don't have a forward facing plenum, got GL anyways.

[DrewII]

sounds like problem with one or two of your injectors. does it drive like a WRX? joking does it drive like a dog is there a noticeable loss of power ?

[syx]

ohhh no a missfire ?? was anybody hurt?

Only my pride and bank account so far

loose injector plug? or perhaps faulty injector?

Ill get him to check injectors

Thanks

Did mechanic regap your sparkplugs? After I installed my new sparkplugs I had all sorts of misses, after making sparkplug gap smaller the missfire was gone.

Something to try anyways, GL!

Ill ask

Thanks

I'd look at all the small things first before spending any more $$$, wiring, fuses, earth straps, coil loom, fuel pump wiring and fuel pressure, 0.8mm spark plug gap, clean AFM, O2 sensor, injector clean etc etc etc These things can drive you bats finding them.

Also try this: http://www.skylinesaustralia.com/forums/St...er-t233110.html

I will suggest these things aswell

and thanks for the link, fingers crossed its something simple like that !

Thanks

Get a screw driver preferably one with a steel shaft all the way through and start your car. Then use the screw driver as a stethoscope and put the blade end on the top of the injector and use your hand as a cup and listen to the noise coming out the end of the screw driver. Make sure that all your injectors are making the same level and pitch of click, ( if you know what i mean).

This will be very hard if you don't have a forward facing plenum, got GL anyways.

Thats way to complicated for me

Ill suggest that method to my mechanic.

Thanks

sounds like problem with one or two of your injectors. does it drive like a WRX? joking does it drive like a dog is there a noticeable loss of power ?

Huge loss in power when it happens, so yes just like a wrx

Thanks for the tips guys.

[DrewII]

injectors arent flowing properly then. one or two could be stuffed

[Guilt-Toy]

hahahaa! i asked for that one

Gap your plugs to .7 and try again. new bcpr7es NGK's will be fine gapped to .7

No they missed............

[syx]

sorry to drag up an old thread but im selling this car now and it reminded me that I never posted up what fixed the missfire. I dont want people searching my posts and thinking it isnt fixed !

anyway it was a dry solder joint in the electrics.

1000 points to tridentt150v

[frozenwaffles]

where was this dry solder joint?