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nissan
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Discussion Starter #1
Hi Y'all !
I have bought recently a 1994 td 42 GQ.
My GQ smokes white on hard acceleration and steep hills:confused:

its not a thick white smoke though, but I can see it on my rearview mirror.

please help me track down the reasons for this problem....

thanks!
 

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nissan
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Well if your like me, I'd be hoping that is your rear tyres lighting up !:)

Evidence for the case against that theory, would be the fact that your engine description is for a TD42. Also no metion of a turbo and $30000 of engine mods.

From my limited knowledge I would be guessing that your burning oil , due to valve stem seals , blow by, glazed bore etc

I've have been meaning to post about my td42 aftermarket turbo using or leaking about half a litre /1000k !:(

cheers Greg
 

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Part of the furniture
nissan
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it could also be raw diesel, ie unburnt fuel.

Diesel Smoke tells YOU a Story… - maybe useful to you ?


mine does this tooo,
and ive just put it down to to much fuel.
as it doesnt do it under idle or normal driving, only high revs.. 3k+
and mine run's like a dream! not missed a beat.

but yet again, i dont see it in the mirror when driving.
 

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nissan
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Thats what i love about this site, always some one who knows where the info is .

For while ive been wondering if my clutch fan was working at all, and you log here and find out that someones just fixed theirs for some time and $20.00busk of silicone oil from Toyota.

If the white smoke is unburnt fuel, would that also produce high egts at the same time?

CHeers Greg
 

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Nissan Safari
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It also means water. I get this problem when the airfilter gets a little damp.
Al
 

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The nutty professor
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white smoke is either water, oil, or unburnt fuel ... which is different to black smoke which would be an incomplete burn of fuel

unburnt fuel (white smoke) wouldnt raise egts , where black smoke will raise egts as it is still burning a bit on the way out

if it was unburnt fuel , the motor would be missing ie: running on 5 cylinders and it would be felt as a miss
 

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nissan patrol
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White smoke is from lack of fuel. Check your main fuel filter as well as the 'acorn' filter in the top of the injector pump (assumuing someone hasn't already removed it and not refitted one).
Blue smoke is engine oil. Black smoke is unburnt fuel.
 

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fairly rare to get white smoke from lack of fuel. you would notice as it would be gutless. however sometimes you can get it due to wastegate failure and its overboosting.

more common is incorrect timing. fuel filter blockage changes internal IP pressure which controls the timing, so the timing goes out.

the other is engine oil evaporating, but not burning, in the exhaust. common one being turbo seals.
 

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It could be a clogged up diesel filter which might have sludge or water in it.... try changing that. It could also be a slight leak in your fuel line thats sucking air in under acceleration.
 

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nissan safari
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@fishmagnet. your post on #2 describes my gq. "From my limited knowledge I would be guessing that your burning oil , due to valve stem seals , blow by, glazed bore etc". Any suggestions on how to manage this? My mechanic says the the seals are a goner.
 
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