Rought idle

[chaosli]

i had this rought idle that i cant figure out.i got a new water temp sensor i checked for vaccum leaks but i dont see anything wrong.it idles at 800rpm with about 10psi vaccum

this is on a single cam with a t04e set up and its on the stock ecu with 182psi across all cylinders

i just want to make sure before i tune the car i have a aem ems for engine management

[WDRacing]

I swapped in some new NGKs yesterday...cleaned my idle right up. At $2.99 a piece it's a cheap way to keep your motor healthy. How's your timing?

[chaosli]

i had the plugs in there for less than 300miles and the timing is dead on.

[chaosli]

oh it running really rich too constant 10 afr at idle

[chaosli]

ok i found out one of the solenoid in idle air control was bad. i got it replaced and its a little better now but it still dies and after the car warms up it back o running rich again

[trackslut240]

check your sensors: coolant temp sensor, throttle position sensor, knock sensor. all procedures found in sticky, 9 out 10 times a bad cts will give a rich condition. also check o2 readings.

[chaosli]

the coolant temp sensor is new

last time i checked the tps is fully functional i checked with the aem

don't have a knock sensor in a single slammer

haven't check the o2 read out but i should

and lastly would you mind pointing out where this sticky is? maybe a link or sumthing.

[trackslut240]

i have known new sensors to be out of spec, heres the check for cts:zerothread?id=254375

tps check:http://www.240sx.org/faq/artic...m.htm

and o2:zerothread/296414

[trackslut240]

while you are at it poking around with the multi meter, might as well check this puppy too:zerothread/254283

[chaosli]

ok update checked all sensor nothing changed
idle at 10 afr then sometime it slowly clime to lean and stay at idle.
i have crazy smoke during idle
if nothing helps i am gonna send it out to a tuning shop and hope they would fix it

[biggie]

Stock injectors? Stock MAF? If not, nothing controlling them?

[WDRacing]

If it's idling at 10:1 you need to stop starting it or you'll wash the oil of the cylinder walls and scratch them. Also change your oil right away because it's full of fuel.

There's no way the stock injectors should be running at 10:1 at idle unless the fuel pressure is out of control.

List your entire setup dude so we can better troubleshoot.

WD

[chaosli]

t3t4 t04e
stock injector and stock maf
running on a base map that came with the aem
using 3bar gm map and gm iat
warblo 255lph fuel pump
removed emission stuff all but the iacv
aem ems for management

when i start the car its really lean at idle then after a short drive its become rich at idle
when cruising its at 12-15
when wot its 12-13

[chaosli]

i just did an oil change and changed the spark plug it cleaned it up and got normal afr for a while when i was idleing then i took it for a drive and now its the same again

i am goint to change the fuel regulator to a adjustable one soon