Engine Cuts Out Occasionally

[TTT]

So my car got me to Brisbane with out a hiccup (can't say the same for my missus..)

now in the last 2 days, it occasionally has a weird problem.

it cuts out like it is missing, but stays "OUT" so to speak for much longer.

it happens more so when you have your foot into it.

I could be taking off in first gear and heavy acceleration will make it cut out.

it is a pretty HARSH cut too.

it's like got NO forward motion at all from it until I take my foot off the pedal.

I know what it's like to have a miss from spark plug or coils as I had it before and this is not the same.

with a spark miss, it cuts and comes back quickly..

at the moment, when it cuts, it's like it is dead for 2 seconds before coming back.

I thought maybe fuel filter is blocked but it seems to rev out fine in neutral.

but when there is load it cuts..

and to top all this off, it only happens occasionally.

mainly once fully warm and had a few stop goes like at traffic lights.

I won't get to check it properly till saturday so any response would be helpful.

mods:

exhaust

filter

turbo tech boost controller @ 11psi

fmic

everything else is stock including fuel pump.

I have checked:

plugs

coils

intercooler pipes

vacuum lines

it idles fine.

the first day it did this, it also had weird idle.

where after it cut out and came back during driving, at the next lights, the revs dropped to 800, then slowly rised to 1500, dropped to 900, then back up to 2000.

sort of like

rev, drop, rev, drop, rev, drop

hasn't done that since.

Kinda leads to me an electrical problem but not sure with what.

thanks in advance.

TT

[Craved]

if its definately throttle realted, try checking the voltages on the TPS.

no one i know hits full throttle on idle..

only other thing is it could be fuel pressure related as the std fuel pressure wont change on idle, as there is no boost to get it change on the FPR.

[CATKICKER]

Funky Earth? AFM / AMF plug connection (Weird Idle...) - when you come to the lights does it drop revs and go back up?

[fEkuaR]

when you come to the lights does it drop revs and go back up?

he clearly stated at the end of his posts that it does go up and down at the lights. :| ... Ive had similiar issues with my skyline and ive had to at times pull over as the car has just turned off while driving. Makes pulling over hard with no POWER STEERING!... Im wondering if it is ECU related it has been a very hard thing to pin point ive had my mechanic look over the car and has basically said he would really need to see it doing it which wouldnt be easy to do as it is inconsistent.

Ill be watching this thread with interest as its very similiar to my issue.

[paulr33]

if TPS isnt connecting correctly or loose it will do what youve described

[R31 POWER]

Im thinking afm plug.Hows your pod mounted?it the afm plug hard up against the body?

Edited May 18, 2006 by R31 POWER

[CATKICKER]

you might try cleaning your AFM and/or you ACC valve.

The fact that it cuts out thought makes me think it is electrical (as you have too). Check all your connections (disconnect and reconnect), remove your earths, sand back/clean and refit...

[edspaged2]

it sounds like its electronically related. check your diagnostics on your ECU. Hopefully it may have picked up the problem and will tell you whats wrong. If the diagnostic on the ECU dont work, then i bet it may be your ECU.

[lows_13]

I'm having the exact same trouble as you, just as you described it.

I havn't had a chance to check anything yet.

http://www.skylinesaustralia.com/forums/in...pic=118020&st=0

[WazR32GTSt]

GTST - i had this exact same problem

i re-soldered the inside of my AFM and it fixed the problem 100%

all you need is a soldering iron and some silicon

do a search for "solder AFM" and you will find the guide that i used

cheers,

Warren

PS to everyone reading... i don't want hundreds of PMs about what to do - i already have received 5 and that's 5 more than i expected!

[WazR32GTSt]

here it is...

http://www.skylinesaustralia.com/forums/in...hl=solder++AFM*

cheers,

Warren

[PHATR32]

check this out

http://www.skylinesaustralia.com/forums/in...opic=113284&hl=

should work on other afms too

steve

[lows_13]

I just operned up my AFM of my R32, inside there are 5 pins, but only 4 of the 5 are connected.

The fifth on the far right doesn't have any connection?

Should all of these be soldered/connected?

[TTT]

Tandy electronics.

$13 - Soldering Iron

$8 - Solder

$6 - Black silicon

this morning I pulled out my air box, took the air flow meter of it, cut out the top and all the points were already intact..

(YES only 4 are attached,)

(this is all in the link that PHATR32 posted above)

I soldered over them anyway..

sealed it all back up.

then I had a look in the afm to see what condition it was in.

I thought it was a little strange that the afm wire probe in it was black instead of that red/orange colour my old skyline one was..

upon closer inspection in direct sun light, it was red/orange just with shit loads of oil and dirt on it.

so I walked to the nearest coles and got some engine degreaser.

degreased the inside of the AFM good.

washed it out.

degreased again and washed it out again till it was all noice and clean.

shook it dry.

pinched wifes hair dryer and dried it out good.

attached it back to the air box, plugged it all back in and I'm all god now.

so as per my original post about feeling like a noob, it is now quite obvious I am..

somtimes..

[TerribleOne]

I had the exact symptoms with the huge loss of power at wide open throttle and hunting idle. I removed the AFM and resoldered the joints and it made it better for a couple months so I got another AFM and it was sweet for a few months. The last couple weeks the idle has been hunting so I'm thinking this AFM may be rooted too, or the idle speed controller may need to be cleaned out.

[maddowse]

ok i dont know if you have solved the problem and im not a mechanic (also a newby skyliner) but when you say you boot it and it cuts out is it like when you dont have traction controll off and boot it ????, it could be your coil packs are on there way out , i heard in the wet if you keep hitting the slip light (traction control ) it can cause your coil packs to crap out , might help sorry if its totaly wrong,

my car cuts out for like two seconds if i boot it with traction controll on , id say if your coil packs are failing if would feel the same since that how the traction controll works (asuming an rb30 has traction controll ??? i dont think they do )

[skins]

I had the exact same issue ages ago. I over oiled my pod. Cleaned the AFM and it was all good.

So now I make sure its not over oiled.

[RBceffy25]

stangely enough i had this exact problem when i accidently plugged in coil no. 4 the wrong way. yes thats righ i put the plug on up-side-down. I know this is really f*ken stupid and believe me its the last time i'll ever work in the dark. i always carry a torch in the car as a result of this. I had just cleaned my AFM, pod, gooed and taped the coils and cleaned and reset my IAC before this without having this problem at all but the car was hunting at idle and had a bit of a miss. then i did my plugs a few days later and the problem started. couldnt work it out for a day then decided to check the obvious, that being the last area of the engine i worked on (the plugs). yes i am a noob for this.

Dunno if this helps.

Thanks for reading.

Edited April 22, 2010 by RBceffy25