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gq fuel screw ?

Tech Talk for Nissan owners.

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gq fuel screw ?

Post by gqmudder91 »

hi all serviced my gq 4.2 na the other week week and ever since i have gotten less k out of a tank and was eading a thread on here on a build up ( cant remember which one ) and he said that u can adjust the fuel screw on it to make it get beta ks is it true if so how much ?
cheers :)
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JWB
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Post by JWB »

I'll state the obvious here,

If you have serviced the car only to get noticable reduced fuel effeicency(SP)
then I would suggest you leave the fuel screw alone.
As they are not a cheap engine to fix!
re-check what you touched and /or take it to a professional.

cheers
JB
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Post by XTREME MMM »

JWB wrote:I'll state the obvious here,

If you have serviced the car only to get noticable reduced fuel effeicency(SP)
then I would suggest you leave the fuel screw alone.
As they are not a cheap engine to fix!
re-check what you touched and /or take it to a professional.

cheers
SMART COMMENT AND QUITE TRUE!

Good one John.
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Post by MUDGUTS83 »

being an n/a u carnt do to much damage!!!! not enough fuel will cause over heating prob!!!! but as old mate said if u dont no what ur doing dont touch! a piro gage will help in the tuning it should sit around 450 i think but not 100 percent sure on a n/a
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Post by fnqcairns »

There is no black magic surrounding the fuel screw, turn it up too far and EGTs 'can' increase. turn it down too far and car is so slow it's a dog.

No magic bullet for economy from the fuel screw I am afraid but yes you can get better economy from it with a reduction but it will always take the same amount of hp/energy to accelerate the car up any speed and then to keep it there.

Does the car accelerate noticeably better after the service? what was the service?
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Post by macneil »

MUDGUTS83 wrote:being an n/a u carnt do to much damage!!!! not enough fuel will cause over heating prob!!!!
quite wrong there... diesels create more heat with more fuel.. but you can stuff the engine if your not putting enough fuel in any way...
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re

Post by gqmudder91 »

hi it was the first service since i got it so it was evcerything oils and filters
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Post by macneil »

did you put the pre filter back in what air filter did you use?? start the car get it warm and open the oil filler cap if there is lots of smoke (blowby) the engine isnt in great condition at all
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Post by bilby »

my guess is the secondries are sticking open , does it root around at low speeds like its got the handbrake half on ?
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Post by gqmudder91 »

ryco the brand of filter is for the air and no smoke out of oil cap and no crap like that either
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Post by Dominator »

Ryco filters are shit. They leak oil back into ther sump.
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Post by ludacris »

If the fuel filter was done did you fit it correctly and bleed the system properly.

Cris
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Post by gqmudder91 »

yer copyed off the service manual that came with the gregorys i think it is
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