I brought my 93 sentra SER to the stealership. The car was idling bad and hesitating like crazy. They said it was the IACV. Anyone have a online FSM link? Or install instructions. They said $680 for the part and install. I would like to do it myself. Thanks

Ouch! Does anyone have an exact picture of where this is? I hear you could clean it out with just some throttle body cleaner..

You could buy one for about $140 and intall it yourself in about 1-2hrs. tops.

take it off, and clean it very well. the only thing that you need to buy from the dealership is a new iac-v gasket so that it seals to the intake manifold. it is like 2 dollars. the iac-v is on the passenger side of the intake manifold down by the oil filter. there are 4 bolts that you have to take out. if you do a quick search, im sure that someone has a pic so you can see for yourself where it is located. i did this to mine not too long ago and it helped alot.

Are you sure it is the IACV? it would seem that if it was hesitating, that it would be something else, usually if it was just the IACV the car would run ok, but have difficulty maintaing idle, either too high or not at all. Check to make sure that there aare no holes or leaks in your intake hose between the MAF and the throttle body. Check for vacuum leaks, buy a can of throttle body cleaner, start the car, do what you need to make it idle or arleast run, spray the cleaner in areas of the intake gaksets, any vacuum lines, even where the injectors go in. you would be amazed what a small crack in a PCV can do. while you have this new can of throttle body cleaner, clean out your throttle body, it couldnt hurt. Also how are your plugs wires etc? You may even have an EGR valve stuck open, that would make it idle poorly and hesitate, you may wanna check it too. Try that out and see what happens.

IACV not a bad bet, but lotsa stuff here possible. IACV on a highport is fun, but basically they get all crudded up, replacing it for $680 would require torching the dealership that suggested it, and that's illegal. Dontavious has good suggestions. Pay your 30 bux to the forum here to get full access to the online fsm's, and/or hunt on ebay.
Jer

Are you sure it is the IACV? it would seem that if it was hesitating, that it would be something else, usually if it was just the IACV the car would run ok, but have difficulty maintaing idle, either too high or not at all. Check to make sure that there aare no holes or leaks in your intake hose between the MAF and the throttle body. Check for vacuum leaks, buy a can of throttle body cleaner, start the car, do what you need to make it idle or arleast run, spray the cleaner in areas of the intake gaksets, any vacuum lines, even where the injectors go in. you would be amazed what a small crack in a PCV can do. while you have this new can of throttle body cleaner, clean out your throttle body, it couldnt hurt. Also how are your plugs wires etc? You may even have an EGR valve stuck open, that would make it idle poorly and hesitate, you may wanna check it too. Try that out and see what happens.
I already did the egr test thing and it still did the problem. I also switched out the MAF with a nx2000 still did the problem. I'll look for vacuum leaks. Edit: I just picked up the car from the dealership. They told me $350 for the Diag. I told them no, I agreed for a 1 hour diag and someone should of called me if it was gonna take 3.5 hours to find the problem. So they dropped the price to $150 I still wasn't fully happy but I didnt want to argue any more. So anyone got a pic of where it is? I have a nx 2000 parts car I can take it off of. One more question do you have to take the plenum off or can you change it without removing the plenum?

http://www.sr20forum.com/showthread.php?t=167600

http://www.sr20forum.com/showthread.php?t=167600
thanks you the man

so I put the nx 2000 aac valve on the sentra SER. The car is still doing it but not as bad. I know it worked on the other car because it ran fine before I took it off. I still havnt looked for vacuum leaks yet. BTW it took me exactly 35 minutes to take off the old one and put the useed one on. 350 dollars for labor my butt.

The Vacuum leaks are crutial here, way more crutial then that valve functioning, cause if that valve were trully broken, and stuck in a certain position, if there were no vacuum leaks, you could adjust the idle and it would stay so long as the conditions dont change. I know that yes it can cause idle problems, but you always check the easy things arround it before throwing money at pats. I mean if you had an egine leak would you just replace the engine? or would you track down the leak and fix the leak? same thing, you have to look at the other things that make the car idle properly, and the most basic of them all is the engines ability to maintain the proper vacuum level at idle.

I finally checked for vacuum leaks. I almost used a whole can of TB cleaner. No change in idle whatsoever... I am noticing if I let my car sit and idle in the driveway say for about 5-10 min before I drive it, it doesnt do the problem. If I just start it up and go it does it. What would be the affects of a bad 02 sensor? Thanks again.

Well the O2 sensors work best when at there full operating temperature. As it has aged, it may just be qwirky like that, you could always pull it and make sure its not totaly balck or has its vents covered in soot. it would be a safe bet to replace it, or atleast inspect it, the kind of power loss problems you describe are synonymous with nissan OBD technology and a bad/lazy sensor. it may also help on the path to your idle problems, beyond that you would need to back probe the ECU to enure you dont have a bad/shorted wire.

beyond that you would need to back probe the ECU to enure you dont have a bad/shorted wire. Do you know what wire is the one in the ecu for the 02 sensor? In my 300zx the ecu is under the passanger side floor board. Is it the same in the sentra?

The ECU I believe is behind the radio and all that, there are 2 stylish, albeit fragile, but stylish none the less covers, one on each side of the center console, one to the right of the gas pedal, and the other, on the passengers side, in the same vicinity, and I believe the ECU lives there. Im not sure which wire is wich, you might be able to get a nissan dealer to copy you the ECU Pinout page from the FSM, or I hear if you become a paying member of the forums they have that stuff avaliable for you.

I already did the egr test thing and it still did the problem. I also switched out the MAF with a nx2000 still did the problem. I'll look for vacuum leaks. Edit: I just picked up the car from the dealership. They told me $350 for the Diag. I told them no, I agreed for a 1 hour diag and someone should of called me if it was gonna take 3.5 hours to find the problem. So they dropped the price to $150 I still wasn't fully happy but I didnt want to argue any more. So anyone got a pic of where it is? I have a nx 2000 parts car I can take it off of. One more question do you have to take the plenum off or can you change it without removing the plenum?
I am looking for parts from a NX2000. Can you remove the doorhandles?

Ok an update. I found this link http://www.se-r.net/engine/maf_ground.html I tested my middle wire and it was @ 14-15mv. So I proceeded to do what the instructions said. After I was done the car had a extremely hard time idling. actually stalled out. I got a reading on the grounded wire before it died and it was at 4-5mv. I'm gonna check it more tomorrow in the daylight, for vacuum leaks and possibly clean the throttle body out. Any other suggestions?

(As for the door handles I am not sure yet If I do get rid of them I will send you a message)

Ok an update. I found this link http://www.se-r.net/engine/maf_ground.html I tested my middle wire and it was @ 14-15mv. So I proceeded to do what the instructions said. After I was done the car had a extremely hard time idling. actually stalled out. I got a reading on the grounded wire before it died and it was at 4-5mv. I'm gonna check it more tomorrow in the daylight, for vacuum leaks and possibly clean the throttle body out. Any other suggestions?

(As for the door handles I am not sure yet If I do get rid of them I will send you a message)

Put the car in base timing mode and adjust the idle properly.

lmao this is getting better and better...... Ok So this morning I decided I would clean the throttle body before I adjust the idle (according to a post i read). So I clean the TB put it back together start the car it idles perfect for 5-10seconds. then it dies. I restart and it seems like its gonna die again, so I hit the gas to keep it alive and it seems like the throttle just dies and does nothing even when I am hitting the gas. Unless I repetedly hit the gas very fast I can keep it alive but if i just have a steady foot on the accelarator it just konks right out. So basically I dont think I can even warm my car up to even attempt the idle adjustment , let alone accurately hold it at 2000rpms for 2 min... I have work tomorrow to. Any more suggestions would be good. As for the ecu I havnt checked yet but hopefully within an hour or 2 I will/

ok so I took the egr bpt tube and cleaned it out so when I was blowing into it I could feel air coming out of the other side of the exhaust egr hose. I found out how to do it on this page http://www.se-r.net/car_info/problems/index.html#Surge%20and%20hesitation Well that didnt do anything either. Still runs like poo. Still thinking of something else to try. Anyone please?!