i have a few question about my car i read a few threads for the iacv-aac and the knock sensor so i'm gussing that if i replace both of those items my idle will not go crazy like it's doing now (racing between 800-1500) and the car hopefully won't stall out but what cought my eye was this code that said Improper Shifting to Second Gear (Automatic Transmission) my car doens't seem to shift any different from the day i bought it what gives?


all help will be welcome thanks for your time

 

Maybe it's never shifted right from the day you bought it, so you don't have anything to compare it with

Not sure what you mean by your idle is "racing"..

 

but why would it just now send that code?

 

Your idle is jumping up between 800-1500 in neutral? or in gear?

 

in neutral

 

Your tranny shouldnt have anything to do with that.. hmm.

 

ok whew but whats with that code

 

what was the Code #?

 

thanks for the quick replys too

 

11-4 (11 long - 4 short) Improper Shifting to Second Gear (Automatic Transmission)

 

All I could find :\
http://forums.maxima.org/showpost.ph...2&postcount=21
http://forums.maxima.org/showthread....ar#post4252458

 

thanks sober bro for all the help

 

The idle jumping around could be a vacuum leak...

I didn't realize the tranny code just popped up... you could try reset the ECU/CEL and see if the code reappears. If the tranny still shifts the same, perhaps it was a one-off thing...

 

i'll reset the code and see if it appears again and for the idle how much do u think it'll cost to have someone check the vacuum line or is that something i could do myself

 

does anyone know how to check for a vacuum leak or how much it cost

 

Spray TB cleaner or something like that around the engine and see if it the revs move, if it does you found a vacuum leak...

Usally if its like a disconnected vacuum hose you would hear suction.

 

so just spray the whole engine with it or are there hoses i should look at

 

Spray anywhere you suspect a vacuum leak, (mostly hoses and around gaskets)

 

If it's idling up to 1,500 from a vacuum leak you should be able to hear the hissing sound where it is comming from. Basically, vacuum is present from behind the throttle plate, through the intake ports all the way into the cylinders. There are also several vacuum ports on the intake that route vacuum to different things throughout the engine. Vacuum is used to control things, such as the heat/ac flapper doors, and it is used by other things, like your egr valve, fpr, and transmission, to indicate how much load the motor is under. I would start by looking at all the hoses located behind and under the throttle body.

 

aight cool i'll check the hoses by the tb and pvc hopefully it's just a hose that needs to be replaced