Cleaning IACV
#41
#44
i did mine just for the he** of it but my idle was a little high (around 900). it gets carbon build up in it and i just used an old tooth brush and some carb cleaner. after cleaning it my idle became a little low (600). idk if its really preventive maintenance but i just like the idea of having a clean engine.
Hmm, I just cleaned out the IACV last night, my idle is more stable however it is at 1000, it use to fluctuate between 600-700. Overall I think it was worth it, I noticed a difference in the drive this morning.
#46
Since cleaning the TB, I got 432 miles on a tank ...and that was before the low fuel light came on. After 158K miles on the clock...that's pretty good. I figure that's about 27MPG
I still have yet to do the IAC!
I love this site.
I still have yet to do the IAC!
I love this site.
#52
sorry about bumping up an older thread, but is cleaning the entire upper and lower intake manifold worth it?, I mean If I am going to take of the IACV, Tb and I will probably to the EGR also, would there be any benifts to cleaing up the entire Manifold?
#54
Ok, I have a strange quesiton: while coming to a stop at a light (2 times over 3 days) I noticed the RPM's suddenly shoot up and I can feel the car shift into 2nd gear. I slam on the break to come to a full stop and throw the car into nutral. The car bucks like a MF and the RPM's come down. I put it in drive and everything runs fine. While researching this in the forum, I keep coming back to the IACV issue. I've had my car from 40k to now: 136k and I've never cleaned the IACV.
Could this really be my problem? I have bought a gasket for a whopping $1.97. Again, I've never cleaned this, but am I to assume that all I need to do is
remove the IACV unit with the nuts/bolts
clean the hell out of it with a cleaner/towels/tooth brush
ensure there is a clean surface in which the new gasket will connect to and replace
tighten the IACV unit back into position?
Could this be my problem? If so, I love simple things!!!
Could this really be my problem? I have bought a gasket for a whopping $1.97. Again, I've never cleaned this, but am I to assume that all I need to do is
remove the IACV unit with the nuts/bolts
clean the hell out of it with a cleaner/towels/tooth brush
ensure there is a clean surface in which the new gasket will connect to and replace
tighten the IACV unit back into position?
Could this be my problem? If so, I love simple things!!!
#55
Ok, I have a strange quesiton: while coming to a stop at a light (2 times over 3 days) I noticed the RPM's suddenly shoot up and I can feel the car shift into 2nd gear. I slam on the break to come to a full stop and throw the car into nutral. The car bucks like a MF and the RPM's come down. I put it in drive and everything runs fine. While researching this in the forum, I keep coming back to the IACV issue. I've had my car from 40k to now: 136k and I've never cleaned the IACV.
Could this really be my problem? I have bought a gasket for a whopping $1.97. Again, I've never cleaned this, but am I to assume that all I need to do is
remove the IACV unit with the nuts/bolts
clean the hell out of it with a cleaner/towels/tooth brush
ensure there is a clean surface in which the new gasket will connect to and replace
tighten the IACV unit back into position?
Could this be my problem? If so, I love simple things!!!
Could this really be my problem? I have bought a gasket for a whopping $1.97. Again, I've never cleaned this, but am I to assume that all I need to do is
remove the IACV unit with the nuts/bolts
clean the hell out of it with a cleaner/towels/tooth brush
ensure there is a clean surface in which the new gasket will connect to and replace
tighten the IACV unit back into position?
Could this be my problem? If so, I love simple things!!!
#56
ok... the ONLY way to clean this valve is to actually take it apart from the housing and cleaning the plunger by its self... so u need to remove the 2 gold screws and take it apart gently... then remove the little plunger and gently clean it with brake clean or what ever you wanna use..
you also need to clean the plungers for both the purple connector and the pink one...
again u need to take then out and clean JUST the plunger..
Just spraying the part that is in the picture above doesnt do SHI.T... you need to take it apart and clean it.. cuz after all carbon gets built up on the plunger and keeps the valve open causing the hight idle...
your welcome... good luck...
you also need to clean the plungers for both the purple connector and the pink one...
again u need to take then out and clean JUST the plunger..
Just spraying the part that is in the picture above doesnt do SHI.T... you need to take it apart and clean it.. cuz after all carbon gets built up on the plunger and keeps the valve open causing the hight idle...
your welcome... good luck...
Is there an O ring in there that needs to be replaced? I am looking at the Haynes manual, and it talks about an O ring, but does not show it.
#59
#62
ok... the ONLY way to clean this valve is to actually take it apart from the housing and cleaning the plunger by its self... so u need to remove the 2 gold screws and take it apart gently... then remove the little plunger and gently clean it with brake clean or what ever you wanna use..
you also need to clean the plungers for both the purple connector and the pink one...
again u need to take then out and clean JUST the plunger..
Just spraying the part that is in the picture above doesnt do SHI.T... you need to take it apart and clean it.. cuz after all carbon gets built up on the plunger and keeps the valve open causing the hight idle...
your welcome... good luck...
you also need to clean the plungers for both the purple connector and the pink one...
again u need to take then out and clean JUST the plunger..
Just spraying the part that is in the picture above doesnt do SHI.T... you need to take it apart and clean it.. cuz after all carbon gets built up on the plunger and keeps the valve open causing the hight idle...
your welcome... good luck...
how do you clean the plungers for the purple and the pink ones? do you unscrew the thing where the plugs are connected to (the long gold hexagon rod thingy)? i removed that and there wasn't really any carbon build up. maybe i removed the wrong thing...
#64
My 98 Maxima SE has 121,000 miles on today. I've sprayed TB cleaner in the throtlle many of times. I plan on taking apart the TB and IACV this Staurday so I picked up both gaskets today.
When I have the TB and IACV disconnected should I spray TB cleaner or pour liquid Sea Foam into the engine?
Which way do you turn the black Idle screw to tighten the valve and reduce the idle, clockwise or counter-clockerwise?
When I have the TB and IACV disconnected should I spray TB cleaner or pour liquid Sea Foam into the engine?
Which way do you turn the black Idle screw to tighten the valve and reduce the idle, clockwise or counter-clockerwise?
#65
you should NOT just be spraying TB cleaner into the intake. that gets sucked into the IM and accumulates there.
you should REMOVE the tb and iacv and clean them once they are off. make sure to clean both sides of the butterfly plate.
you should REMOVE the tb and iacv and clean them once they are off. make sure to clean both sides of the butterfly plate.
#69
i had ZERO experience with any kind of car
at this point i can safely say that cleaning the IACV is one of the easiest things you can do. trust me.
#70
The reason I am taking off both the TB and IACV is to clean them manually. Those aren't the only 2 parts on the engine that needs cleaning so I'm pouring liquid sea foam into the engine when they are disconnected.
I'll find out which direction closes/ opens the valve when I have the IACV disconnected.
#72
IACV gasket is 23785-AD100
TB gasket is 16175-31UO1
I found that turning the idle screw clockwise will tighten the valve and vice versa.
Tomorrow I'm taking apart the TB, IACV, PCV valve, EGR and a few other parts to give it a good cleaning.
TB gasket is 16175-31UO1
I found that turning the idle screw clockwise will tighten the valve and vice versa.
Tomorrow I'm taking apart the TB, IACV, PCV valve, EGR and a few other parts to give it a good cleaning.
#73
to andrei3333 .
after about 10 months your pictures and instruction of the iacv and tb cleaning were posted are still showing us people not to spend too much money when it can be fixed with few bucks and also save time by not going to the shop.
doesnt matter from where you got the instructions , thanks for posted them in here.
after about 10 months your pictures and instruction of the iacv and tb cleaning were posted are still showing us people not to spend too much money when it can be fixed with few bucks and also save time by not going to the shop.
doesnt matter from where you got the instructions , thanks for posted them in here.
#77
here are some recent pics that show the actual insides of the valve.
the last time i cleaned the IACV i never bothered removing that gold cap (fear of stripping a screw) - but this time i did and there was a pretty large deposit of debris.
and then the mounting point (looking at the inside of the EGR mount)
the last time i cleaned the IACV i never bothered removing that gold cap (fear of stripping a screw) - but this time i did and there was a pretty large deposit of debris.
and then the mounting point (looking at the inside of the EGR mount)
#78
I want to clean mine but im not really confident enough kinda scared with the throttle cables i dont wanna mess them up..but i think im gonna try soon as i got time,tool and gasket. Anyways very nice info on here thanks all
#79
[QUOTE=ROCKART;6589101]here are some recent pics that show the actual insides of the valve.
the last time i cleaned the IACV i never bothered removing that gold cap (fear of stripping a screw) - but this time i did and there was a pretty large deposit of debris.
Good pics. Did you remove the pink and purple connector parts too? Is that an o-ring where the brown connector part was? If it is, did you replace it? Was there any difference?
I removed mine before but I didn't take any of the connector parts apart. There was no difference.
Thanks!!
the last time i cleaned the IACV i never bothered removing that gold cap (fear of stripping a screw) - but this time i did and there was a pretty large deposit of debris.
Good pics. Did you remove the pink and purple connector parts too? Is that an o-ring where the brown connector part was? If it is, did you replace it? Was there any difference?
I removed mine before but I didn't take any of the connector parts apart. There was no difference.
Thanks!!
#80
naw i left the pink and purple plugs alone
and im not 100% sure onw hat you mean by brown connector oring, but the answer is no, there is no oring there.
as far as difference goes, i cleaned it as recently as january, so what you see here is only about 8 months of wear/
and im not 100% sure onw hat you mean by brown connector oring, but the answer is no, there is no oring there.
as far as difference goes, i cleaned it as recently as january, so what you see here is only about 8 months of wear/