Idle adjust question

[Mr. Spool]

I know this has been discussed, but do I adjust the idle with the car running or with it off. Thanks.

[mistaanime]

either way..on or off is fine...juss when it's on...beware of the fan.

[Mr. Spool]

So all I do is pull the two tps sensor plugs, start the car, turn the idle adjust screw, shut the car off and plug in the tps again?

[kandyflip445]

I did it with everything plugged in.*shrugs*

[Mr. Spool]

will this hurt it? I guesse I will try it though, wish me luck.

[Mr. Spool]

i just did it and it, I turned it all the way to the right and the idle is still at 1500 when it is warm. any sudjestions to what I should do know. Thanks.

[mistaanime]

hmm...well ..if its okai..at 1500 if you want it that way..then your done..but i realized it ates more gas..so..it's up to u heh..mine is set at 800 now..so it's..fine. i use to run at 11-1200...

[Mr. Spool]

It bothers me that it is alittle high, I seems like it is really straining. Is there any other ways to turn it down.

[PSI240SX]

same problem with my roomates car, dont know why. If you find out let me know lol.

[AadosX]

Is your car stock? Could be a ton of things. MAF, TPS, and more come to mind.

[idlafie]

Originally Posted by Mr. Spool

So all I do is pull the two tps sensor plugs, start the car, turn the idle adjust screw, shut the car off and plug in the tps again?

Auto or Manual Transmission?

Prior to starting, take the car for a quick spin around the block...you want to warm up the engine a little.

If Auto transmission, before checking & adjusting timing & idle, you have to put the transmission in NEUTRAL to get the timing & idle set properly. Make sure you set the parking brake & chock the wheels prior to starting...you don't want the car rolling off on you cuz you forgot to set the parking brake.

Once you put the auto tranny in NEUTRAL, then disconnect/unclip the throttle position sensor harness - look for a three wire harness with the following wires, (green/black/white). The throttle position sensor harness is located by the throttle body right by the Engine Coolant Temperature Sensor.

Check your timing first...make sure it's at 20 degrees +/- 2 degrees.

If the timing is okay, then set your idle to 650 rpm +/- 50 rpm.

Once you are done setting the timing & idle to the required FSM specs, then reconnect the throttle position sensor harness & doublecheck the timing & idle. Everything should stay at the above mentioned specs.

A word of advise. If you plan on working on your S14, you might want to consider buying the Nissan FSM. The info comes in handy when you need it most.

ID
'95 SE...manual transmission

[Mr. Spool]

thanks for the info, I did all of that and my idle adjust screw is all the way in. I still cant get it to drop past 1500. I am wondering if this would affect it, I took the factory fan out and am just using the axillury fan for now. any other sudjestions.

[mistaanime]

But i fixed mah problem by juss getting another maf..so ithats how it idles at 800 now..hehso it was a faulty MAF that i had...if you know anyone wit anohter 240..(same engine)..you can try it out and see if its the problem

[rps13sh]

Wow, 1500! Are You Sure You Dont Have A Rotary In There? Lolz Jk.

[DJ_Sunrise]

i guess im a damn freak having my car idle at 600-700 rpm, lol..

~Sunrise

[Mr. Spool]

That could be the problem, the block is from an s13 and the maf is from an s14. It was working fine before the engine swap. maybe I will try another one.

how would I check for a vacume leak, It might be that but my boost gauge is reading at negetive 20 pounds of vacume, so I should be tight.

[240sxconversion]

when u start your car, u are just idling at 20 psi of vaccumm, U dont have a vaccum leak from what i would think, the only way i know to check them is to go to every hose and check it manually by wiggling it.

[DuffMan]

Originally Posted by 240sxconversion

when u start your car, u are just idling at 20 psi of vaccumm, U dont have a vaccum leak from what i would think, the only way i know to check them is to go to every hose and check it manually by wiggling it.

Haha, 20psi of vacuum cant exist

[rps13sh]

i think 700 is normal. i set mine to 900. i dont know why.

Originally Posted by DJ_Sunrise

i guess im a damn freak having my car idle at 600-700 rpm, lol..

~Sunrise

[Mr. Spool]

on my boost gauge, It reads negitive 20, I am not sure how that cant be but thats what it says, I am going to try to reset my ecu and see if that helps.

on an s14 is 20 degrees of timing the far right white mark. thanks.

[kandyflip445]

Mine is set to 700....though it goes down to ~500 if I turn on my lights and open my door...I've been meaning to check my bat. ground(since my car has been repainted by Maaco) but I'm too lazy.

[Mr. Spool]

I finally got it down to about 1250 rpms, but i still need it to go lower any more help would be apreciated. Thanks