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Rb26dett - Engine Problems

R31 Gagz

By R31 Gagz,
in Engines & Forced Induction

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R31 Gagz Collaborator

R31 Gagz

Posted
Posted

Hey All,

Was a nice day so had the gtr out for a spin, started the engine around about 11:45am and noticed some white smoke drifting past my window. Didn't do it anymore after I got moving...about an hour later after being at the botanical gardens, started her again, couldn't notice any white smoke. Drove around a couple of corners, got to an 80km zone so accelerated quickly up to speed and then I hear this weird pop while still accelerating and then I start loosing power....basically the car wont respond just continually loose speed until I pull over into a side road where it dies on me....now the car will start and run for about 5 seconds roughly while blowing black smoke rings and then dies...if I start it with some accelerator it runs smooth for about 2 seconds then fluctuates once and dies...nothing I do will keep it running, ended up having to get it put on the tray truck and transported home, pushed into the garage with me sitting with my chin in my hand wandering what happened.

Any ideas anyone, I do have a injector leak issue which causes it to run lean sometimes and makes the engine warning light come on (was not far off getting it fixed, hope its not the cause). Running a power FC with sard 800cc injectors, greddy adj. cam gears, r34 n1 turbos running about 14psi.

Thanks,

Gagz

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Duncan Grand Master

Duncan

Posted
Posted

well hopefully its just an intercooler pipe has come off - check all of the pipes and clamps and make sure they are on OK.

If they all look OK you might want to try a compression test to confirm the motor is still OK......

R31 Gagz Collaborator

R31 Gagz

Posted
  • Author
Posted

Hey,

Don't think its an intercooler pipe but I haven't had a good look yet so will check out. Think the afms are fine too, plugs looked fine.

Will have a closer look tonight and report back my findings, I've got a bad feeling though I've done something worse than an intercooler pipe.

Cheers!

Gagz

wrxhoon Grand Master

wrxhoon

Posted
Posted
Hey,

Don't think its an intercooler pipe but I haven't had a good look yet so will check out. Think the afms are fine too, plugs looked fine.

Will have a closer look tonight and report back my findings, I've got a bad feeling though I've done something worse than an intercooler pipe.

Cheers!

Gagz

It sounds like a pipe , how can you say you don't think its a pipe ? Unless you know something you are not telling us . The way you described it , running very rich so much so you can get any power out of it , its typical AFM issue, you are getting unmetered air from somewhere and my guess is you popped a cooler pipe .

You can't see the lower 2 pipes as they are inside the the b/bar , if you take the blinker grills out you should be able so see if the pipes are ok , if you can't see the top try pulling it your hand . You may have to pull the inner plastic guard to secure it if it came off.

SLIPPERY Experienced

SLIPPERY

Posted
Posted

doesnt anyone else think the engine has popped?

-smoke on start-up

-leaking injector

-engine light 'on' (detonation when using powerFC)

-pop or bang noise

"causes it to run lean sometimes"

All this doesnt look good.

If you cant find any hoses that have popped off then get a compression and leakdown done

wrxhoon Grand Master

wrxhoon

Posted
Posted
doesnt anyone else think the engine has popped?

-smoke on start-up

-leaking injector

-engine light 'on' (detonation when using powerFC)

-pop or bang noise

"causes it to run lean sometimes"

All this doesnt look good.

If you cant find any hoses that have popped off then get a compression and leakdown done

It may have one or more ringlands busted but that is not the reason she won't run or the fact that pumps out heaps of black smoke ( thats fuel) . Don't forget even with a couple busted ringlands you usualy have some compression , say 70psi and with boost the busted cyl still fires and what about the other 4 or 5 healthy cyls .

zertek Proficient

zertek

Posted
Posted
It may have one or more ringlands busted but that is not the reason she won't run or the fact that pumps out heaps of black smoke ( thats fuel) . Don't forget even with a couple busted ringlands you usualy have some compression , say 70psi and with boost the busted cyl still fires and what about the other 4 or 5 healthy cyls .

i agree. :)

blind_elk Grand Master

blind_elk

Posted
Posted
doesnt anyone else think the engine has popped?

-smoke on start-up

simply water vapour from the combustion process - nothing more, nothing less.

I agree that it's probably popped an I/C pipe somewhere. Metered air is not reaching the cylinder, causing extreme richness of mixture.

GTRgeoff Grand Master

GTRgeoff

Posted
Posted

Popped a turbo/IC hose.

I did it at Phillip Island with everything hot and because of the overfuelling it melted my rear bumper and tail light.

It went POP and had no power and had a very rich exhaust, like 2m flames.

SLIPPERY Experienced

SLIPPERY

Posted
Posted

yeah what i was getting at was, he doesnt think its a pipe after a quick check

black smoke would indicate a leak and un-metered air going into the engine-i agree :)

I meant there may well be damage (such as ring lands as said, overlooking the black smoke) from a leaking injector. I wouldnt drive the car at all until it was checked if it were mine because theres a chance youve already done some damage and it may only get worse with continued lead footed-ness :D

R31 Gagz Collaborator

R31 Gagz

Posted
  • Author
Posted

Hey All,

After closer inspection, it WAS an intercooler pipe. The pipe on the inlet/passenger side of the intercooler had come off and had a gap big enough to put a couple of fingers in but was hard to see from casual glance as its half hidden by an air guide for the oil cooler.

My intercooler inlet/oultet and pipes are all lipped and clamped really good, this is why I thought it unlikely to happen but had some repairs done recently on the front bar and I think they had the pipes disconnected at some stage so they probably didnt put it back on properly :)

Thank god it wasnt anything serious :blink:

Thanks everyone for all your help and input.

Cheers!

Gagz

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