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MR SLY

By MR SLY,
in Queensland

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MR SLY Enthusiast

MR SLY

Posted
Posted

hey just a quick question.. i've got a r33 GtsT.. when i'm driving it pulls boost it won't go, it feels like it's holding back... on the boost guage it saying i'm on boost.. but yeah it doesn't go it's like it's lagging.. BUT when i turn my car off then on again, it work's normal it pulls boost then goes good... it only happens sometimes though.. any ideas??? i've checked all hte piping and vaccum it's all good... but yeah does anyone have this sort of problems??

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53XYN Veteran

53XYN

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Posted

disconnect the battery .. for about 1 hour.. then reconnect see if its still there.. (this is just to reset the ECU) assuming ur running a factory unit.. if this fixes ur problem buy another computer if its manual i have a TIAL ecu to suit a manual series 1 GTST from my old car.. no speed cut no boost cut supports bigger inj as well let me know if interested..

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Oz Grand Master

Oz

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Posted
can i dissconneted it for more then an hour?? like take it out at night then connect it back in the morning

??

a hour is plenty but u can leave off over night, does sound like a computer problem or a electronic part, may be a idea to have a inviro purge & a on car injection clean done, could be some thing as simple as dirty TPS & may just need to have a clean, worth a try... :P

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MR SLY Enthusiast

MR SLY

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turbo is fine... still pulling boost....

update.. theres' oil in the last cylinder... and spark plug was BLACK AS!! got new ones and cleaned the oil away... works BEAUTIFUL!!

5 days later... it happened again.. so i checked if there was oil in the cylinder again.. there's none so i cleaned the ends of the spark plugs. now it works good again..!! what the!! again when it did happen, i turn my car off then on again.. it worked normal again..

can't figure it out

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nathmacca Community Regular

nathmacca

Posted
Posted

i have a similar problem with my gtir, what it is with mine, is my afm on its way out, and if for instance i take off at the lights and load it up, it sends the computer into a failsafe mode, limiting boost to 7psi, and making it run rich as, im unsure if skylines have the same thing in there computers.

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madbung Grand Master

madbung

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One oily plug :P

How'd that oil get there? that's the question..

Was the plug oily or just real sooty from running rich?

If it was oily I'd be doing a compression test straight away, also I'd be driving it gently until you find the problem just in case it's a mechanical prob and not ecu or tune related ie: cracked or sticking ring or a problem with your valves.

If it's sooty from running rich and all other cylinders are fine check that injector then valves.

One oily plug is pretty scary imho.

Keep checking that plug see if it oils up again

Goodluck.

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MR SLY Enthusiast

MR SLY

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but everytime i undo and check the spark plug.. i works good for about 5 days ish.. then i happends again.. i've just changed hte spark plugs... there's no oil in the cylinder..

nathmacca.. it does hit 7 psi...... i think i might change it.. thanks man.. but if anyone has other solution please let me know

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