32 Gtr Running Rough...sometimes

[OIR32]

hi fellas, my 26 was running like a bag today,ive only had it about 2 months so havent driven it a heap...anyway it has been sitting for a couple of weeks but never done it before. im thinking it could be shagged plugs or coil packs but really have no idea ! i was playing with the 2wd mode by turning the car off and rolling and turning her backk on.. dunno if that could effect it in anyway... what it was doin was running fine one minute and coughing and farting the other, i cant remember if i was into it or not...was like hitting rev limiter at like 3000rpm and not going above that if you rev it. also wouldnt idle. it was playing up as i rolled into the servo, switched it off got some fuel, started it back up and ran fine. if anyine can give me some info that would be awesome. thanks

[iplen]

Coil packs would be my first guess, pull the cover off the coils and let it idle at night, you will probably see the sparks coming off the coils out onto the cam covers. If not possibly ignition timing moving due to damage on the front of exhaust cam. Try the coils first IMO, but there are others who know better

[OIR32]

thanks mate appreciate it

[OIR32]

I just checked the coil packs in pitch black. Couldn't see any spark at all, also took it for a spin and was goin hard. No misses at al under load. Crank angel sensor?? Fuel??

[Moodles2]

How much fuel is left in the tank when this happens, 1/4 by any chance?

[OIR32]

i dont think so, it done it before and after i got fuel mate, it just seems electrical to me, not like an old carby car where they cough and fart. like when i was trying to rev it and it was going from 2500rpm to 3500 rpm like a slow rev limiter. but it didnt just do it between that rev range ran like a bag lower than that too. im going for a drive tomorrow incase it was shit or dirty fuel but still seems sus/electrical to mee.. thanks!

[iplen]

I don't think it will be timing moving based on that, but to check it, put a plug lead between #1 plug and coil, check the timing then turn it off and start it check it again. See if changes drastically.

[pipster11]

afm's have been known to crap out

easy fix tho

http://www.skylinesaustralia.com/forums/topic/113284-fixing-your-rb26-afms/

[iplen]

Good point, forgot about AFMs, see if there is someone close by you can borrow one off, I have spare but it is in Bathurst

[OIR32]

thanks iplen ill try that,if only i was closer haha and pipster i was thinking afm's after reading some info. i did have it all pulled to bits to paint some things, maybe i got some shit on the inside of the afm sitting in the shed?? . i checked the plugs into them when i was on the road and they were in firm, if she does it tomorrow ill tell u boys and try to describe it better, also might contact clean all the plugs i can get to. thanks again!!

[pipster11]

grab some brake cleaner and a soldering iron!

hit the element with the brake cleaner and then solder up the bad joints!

maybe do the soldering first tho, brake cleaner is quite volatile

[OIR32]

SWEET! my bad, didnt see that link above till now.thanks man gotta love this forum and the help you get

[OIR32]

hi fella, well i think i sorted it, and it was the bov leaking!! im 90% sure, so all that minf f@ck for something so easy! also soldered the amf's but as i said recon its the sneaky lil bov!! had to let use know!! thanks

[R.3.2.G.T.R]

hi fella, well i think i sorted it, and it was the bov leaking!! im 90% sure, so all that minf f@ck for something so easy! also soldered the amf's but as i said recon its the sneaky lil bov!! had to let use know!! thanks

how did u know bov was leaking?

[OIR32]

hi mate, well i put my hand over the (air to atmosphere) pipe and the car changed revs at idle.. and i stripped the bov in 2 seconds and found it wasnt sealing when shut, plunger was shagged so i clogged up the hole and she ran awesome

[Lain-63]

Out of fuel.

Bloke I bought it off said the gauge wasnt quite right. Empty around 1/4 tank.

Bov is shagged too

[Moodles2]

How much fuel is left in the tank when this happens, 1/4 by any chance?

I thought so, empty around 1/4 tank means you have a aftermarket pump in there which isnt mounted properly (either a bosch 040/044 or a walbro 255)