nissan 240sx idles low and stalls out in slow turns and when stopped

[Ni2s4s0aSnX]

my 240 is idleing really low, and when i turn or come up to a stop light it stalls out. any ideas on whats goin on.

[DriftNasty240]

I had a very similar problem when I first got my 240- I thought it was the fuel pump, then I thought it was an oxygen sensor, and then I thought it was the mass air flow sensor. It wasnt any of those! It turned out to be a three dollar fix- Your throttle body is probably dirty, so when your butterfly valve closes, it doesnt let any air through into your engine, which makes it stall. this also causes it to idle rough and very low. Go to your local auto parts store and get a (high quality) can of throttle boddy cleaner. disconnect the intake where it comes into the throttle body, and spray it down- also open the butterfly valve manually and wipe it out multiple times, until all the blach stuff is gone. ----THEN, wait about fifteen minutes, and reconnect everything- otherwise, your 240 will not want to start. It should Idle high afterwards, but the stalling should be fixed, and it will run much better.

[Dattebayo]

First of all, the throttlebody has nothing to do with your idle. There is a valve on the back of the plenum that opens up to allow air in the Intake manifold. This is probably where your issue is as well.

But if you say that it happens when you turn, it could be related to your power steering. There is a switch that controls the fluid that can get stuck and cause this problem. I had another post about it in the archives somewhere.

[Ni2s4s0aSnX]

i think the reason why it does it when i turn is because im going so slow. i was thinking it was the sensor wires. but ill check what you guys suggested.

[Dattebayo]

You may just need to replace the valve I spoke of, its is called the IACV-FICD soleniod I think. It goes for about 80-100 bucks from nissan.

[Ni2s4s0aSnX]

anyone else?

[mackdaddy240]

You may just need to replace the valve I spoke of, its is called the IACV-FICD soleniod I think. It goes for about 80-100 bucks from nissan.

Are you guys talking about the the idle air control valve, on the ka or the sr20, I just swapped a sr20 into my 240 and I believe mine is screwed up. I had the same problem when I had a ka24e, then a swapped a ka24de in and problem solved . Now I swapped a sr20 and Im back to square one! I hate nissans IACV

[DjPantsSpecR]

i'm always the first to point out a IACV problem

you can even try to turn up the idle air adjustment screw, i did when i was trying to find my stalling problem. it might help out a bit, but its possible once your setup warms up it wont be any help anymore

its also entirely possible that the TPS sensor is misadjusted or reading poorly in your case, thats what i'll be trying next

try plugging the line to the iacv and see how that works for you

pull the vacuum line off on the intake piping. its the largest one right next to the two small ones nearest the throttle body, obviously not the breather tube though

plug that with something, a sparkplug works nice. now fire it up, you might have to floor it while cranking depending on if its warmed up or not. then try it out

if thats the case you should either clean it, replace it, or just dont care adn plug it with a spark plug

[xTearsFallForeverx]

plugging the hose going to your IACV will cause your engine to stumble even worse. All of the air coming into the intake are measured by the MAFS. Removing or plugging this hose will cause your MAFS to send an incorrect message to your ECU. Thus registering it as a horrible vaccume leak and acting like it has a bad MAFS.

[DjPantsSpecR]

false, my car has been running with a plugged IACV for just shy of a year now. i wouldnt say i plugged it and how it works if i didnt do it myself.

the MAFS will read the correct amount of air going to the motor regardless if it goes to the IACV or the TB, either way the air is still metered once it passed the MAFS so its already been acounted for and the computer knows how much fuel to give it

why is the idle perfect in my car with the plugged iacv and not the one with the stock set up?

the more i read of your bringing up old, previously answered posts and trying to contradict correct information, the more pisse d i am getting.

[xTearsFallForeverx]

lol. im just saying this because when i did that short ram crap on 240sx.org a long time ago i didnt hook up the IACV hose to the intake. It ran like ****. I plugged it off and it ran a little better but it still didnt idle right when it was cold. it would idle fine warm but i had to keep on the gas when i first started it or it would die. after reading what NISTECH said I found a way to hook it up and it ran PERFECT after that.Quote »NISTECHNissan Online Mechanic11347 posts [100%]Galt California5-25-2003 That tube going under your intake is for your idle control valve. this would qualify as a huge vaccum leak making your car run like it had a bad MAF. figure out how to hook that up to your intake tube between the maf and the throttle body.[/quote]

[DjPantsSpecR]

what nistech is refering to is if you DONT plug that!

i was explaining this to someone LONG ago trying to make their own passenger side intake. I already have one so i already saw this problem. if you dont pluig that hose it will get a bunch of unmetered air, and it'll run like crap at idle because it will be lean as hell, and then some, i hope this clears it up

no please, dont call me out like that again, especially when im right. i apologize for my comments,a ll of them, but still, dont be a d!ck

[DjPantsSpecR]

that Nistech quote is even to that guy who i gave the exact same info to, so i fail to see your ridiculously incorrect point

[xTearsFallForeverx]

calm down dude its ok. chill. sorry. shhh