KA24DE Idles Badly

[flames75]

Yeah im new here my 1991 240sx idles terribly. Any Fixes

[Chukidori]

More info please.

Possible causes..

-Maf-Ignition (Plugs, wires, distributor, coil)-Vacuum Leaks-Ecu

[EnemyKhan]

Mine was doing the same thing. I tested the distributor cap, the coils, the plugs, all checked out fine. If all of those check out okay I would recommend doing a fuel injector clean. I used a gas mix injector cleaner product by Techron which can be found at any auto store. In my case if the cleaner doesn't work I'm just going to buy some new injectors.

[flames75]

Well I have new cap button wires plugs. Used injector cleaner already. And New Maf sensor

[flames75]

And no vaccum leaks.

[Chukidori]

Check timing, and have a compression test done.

If timing is good , and since all other things are good....chances are you could have a valve issue....Which will show up on a compression test.

I had my head cleaned and rebuilt, it skipped real bad at idle..it was basicaly running on three cylinders because of a bad exhaust valve on #4 cylinder..on the compression stroke all the fuel/air mix would get pushed out of the exhaust valve......XD
Modified by Chukidori at 2:16 PM 7/31/2007

[Cameron]

it may just be something simple i know that when i first got my 240 my car was idleing really low well the first thing i went to was the throttle on the engine, i dont know if you have checked that or not but just tighten/loosen the screw to your liking if you havent allready tried that to see if thats were the problem was.. if you dont understand or have already done this just lemme know or if you need help with it..

Cam

[flames75]

Alright ill have the valves checked and compression tested. Thanks for all the help.

[Cameron]

Alright ill have the valves checked and compression tested. Thanks for all the help.

did you try the simple little dee dee dee check that i said?

[Chukidori]

Adjusting the Idle Air control screw is not going to help erratic idle...its only going to change the level at which it consistantly idles....

[Cameron]

Adjusting the Idle Air control screw is not going to help erratic idle...its only going to change the level at which it consistantly idles....

are you fricken kidding me haha i was about to post in another thread about some guy who had extremely low idleing and right before i clicked post i had to leave so when i came back i mustve went to a different thread.. my bad dude dont listen to me... some other guy is waiting for answers in another thread.. my bad

[Chukidori]

Wait i was mistaken

I saw SCREW and assumed you meant the IACV.

The throttle cable has nuts on it..but not screws so i was confused

[Cameron]

(yea down here in the south we just call it the throttle the revver the idler whatever) but even if that solved his problem im glad it did but it wasnt supposed to go in this thread in the first place but good luck buddy.