idle problem

[edizer2010]

my idle is not good.no problem starting the car but as soon as i use it for about 20 minutes the idle will drop to 500 then goes down as seems it will die.then goes to 500 and goes down again simultaneously.sometimes when driving, engine will suddenly die.I notice when i switched my headlight to turnoff my DRL, my idle will rise.then if i switched it on again my idle goes down.what could be my problem.?anyone help.

[Nismo_line]

your tps needs some adjusting and make sure its on tight no loose screws

[edizer2010]

pardon me nismo_line but where is it located.?hope someone can provide a pics.thanks anyway

[Nismo_line]

its a small greyish box by the throttle body well that is for a rb20 not exactly sure about a gtr or which one do you have

[edizer2010]

i have a GTST.so i have to tighten up the srews?

[Nismo_line]

the tps slides side to side so move it a abit so idles better and makes sure to tighten the screws back up

[edizer2010]

ok..thanks

[Nismo_line]

sorry for the little bit of info i dealt with this along time ago and i remember when i did mine i had to bump up the idle abit
what i did was turn the set screw on the throttle body to bump up idle abit then adjusted tps for smooth idle then to make sure its set right there is a plug right beside the tps if you unplug it you shouldnt notice a difference in idle if it isnt set right and you unplug that plug the idle will change most likely go higher