R33 Gtst Cutting Out Under Load

[arrydjay]

Hey guys,

Just bought my first skyline yesterday and am having a little dramas with something I didnt notice on the test drive.

When driving normaly it boosts fine and everything seems ok, but when you really jump on it the thing hesitates a bit and then goes and then hesitates and keeps doing it.

Im thinking it might be the coil packs, does this sound about right? Any ideas?

[WYTSKY]

Yeh, could be missfiring - common causes are failing coilpacks and old spark plugs.

How many km's? regularly serviced/looked after? what mods?

Spark plugs are cheap and easy fix.

Coilpacks are 500-600+ for splitfires which are proven great replacements

Yellow jackets are cheaper alternatives

in the DIY section here I also believe there might be ways to repair the coilpacks if they have cracked and the spark is getting out other ways then down the coil, but obviously not as fullproof as brand new...

Other things could be intercooler piping is popping off slightly when under full bost - have to go around checking all the joins/clamps.

[OoskylineoO]

have u cheked how much boost its currently making? maybe its over boosting and hitting fuel cut , but probs a slight missfire doesn't sound too bad

Edited March 6, 2012 by OoskylineoO

[boiracer]

sounds like you did a thorough test drive

[arrydjay]

The car has 150ks on it, it's got a front mount, pod filter and a few other things...

Guy said it's running 8 psi but there is only the factory gauge to check that...

Had new plugs put in only a few thousand k's ago

I just got some yellow jackets so I will try those and see how it goes

[arrydjay]

Not having the best day, just got the coils and on the way back got stuck on the m5 for 2 hours after someone had a massive accident, finally got out of there an the car starts really cutting out and then just splutters until it died on the side of the road.. The fuel gauges is on 1/4 so im hoping its just the gauge is wrong and I'm out of fuel.. It did feel pretty similar to what was happening before but just heaps worse, could it be a fuel problem and not spark?

[Rolls]

Consult cable and figure out what sensor died. Could be the fuel pump even.

Could be about 1 of 100 things, I'd just tow it to a workshop unless you feel like buying all 100 of these parts and replacing them one by one.

[ima_slap_joO]

Sorry to hear, this has to be very disappointing for you! Just get it to a workshop who specialize in nissans, will probably be a small problem. Keep us updated.

[arrydjay]

Good news! It actually did run out of fuel so it wad just the gauge that was out, and i think the coil packs fixed the problem! It's a bit hard to tell with wet roads..as soon as I jump on it it's breaking traction but I can't feel or hear any cutting out... But man...this A-LSD sucks ass....keeps single spinning, gonna have to do something about that..

[soultz]

I bought yellow jackets, changed them and my car still does it....why me....makes me think of how good the car would go if it didn't do it...I wish I knew what the problem was

[soultz]

And to make it even harder, where I live no one knows about nissans haha so my only source of help is pretty much sau

[Moodles2]

When people put aftermarket fuel pumps in (Walbro, Bosch etc), those pumps tend to not like the tank being down to 1/4. This is to do with how the pump is physically mounted inside the tank, can explain why the car "ran out of fuel" with 1/4 left (on the assumption the gauge is 100% correct).

[arrydjay]

Yeah and the guy before me did put in an aftermarket fuel pump recently so that must be it.

I think he must have tried to fix the problem with plugs then pump and he had also tried to fix the factory coils... Glad I got it with the new coils first go...and I got them slightly used for $250 already on another set of rails...cheering

[arrydjay]

Also, the guy before me took the cover that goes over the coils off, he said it lets them cool down a bit more. Is this really neccesarry or can I just put it back on....looks kinda ugly without it.

[Rolls]

I bought yellow jackets, changed them and my car still does it....why me....makes me think of how good the car would go if it didn't do it...I wish I knew what the problem was

It is a rich misfire from running more boost on a stock tune. Turn the boost back to stock and it will stop doing it, if you have an exhaust, fmic etc then you need a remap nothing else will fix it.

If the coils are on their way out replacing them can fix it, but often you need to lean out the mixture as well, it can drop to 9:1 on a stock tune if you run ~12psi. At least that was as low as the wideband went.

Edited March 7, 2012 by Rolls

[Rolls]

I leave mine off, but if they are brand new then who cares, will last forever.

[soultz]

ive had it with this misfiring crap pisses me off lol....i hate yellow jackets i reckon its them

[Rolls]

ive had it with this misfiring crap pisses me off lol....i hate yellow jackets i reckon its them

Read my post. The coilpacks are fine, your car is running a stock tune and hitting R&R, this coupled with bad spark causes a misfire, sometimes new coils make the spark strong enough it "Fixes" it, but often it does not.

[soultz]

but my car is stock? no mods besides coilpacks?

[Rolls]

no exhaust? pod etc?

Mines ECU?

Wrong spark plugs? Wrong spark plug gap?

Edited March 8, 2012 by Rolls