IACV question
IACV question
On my 95 KA i have removed the IACV to clean and inspect it. I removed the copper colored solenoid/motor thing and it appears the valve/plunger is not seating in the valve body. Doesnt seem right, am i on to something here? Is the spring weak? Can I adjust the tension with the screw under the epoxy cover? I forgot to mention the reason i have this apart. I experianced a sudden erratic idle /loss of power/ hard starting problem and eliminated everything to this last device. Any help is apreciated.
Re: IACV question (s14junky)
When you removed your IACV did you shake it any?I remember when I had mine off, I could shake it and it would rattle because the spring had lost it's strength. I'm talking about the spring inside the housing that controls the little plunger inside.
At first I thought my copper colored solenoid was weak too, but the solenoid will stiffen up when it gets the right signal. So the spring inside of it doesn't have to be strong.
Once you remove the epoxy and clean out the threads and CAREFULLY remove the brass plug (don't mess it up!!!), everything should be clear as to how it works. All I had to do with mine was screw in the plug a little deeper, and it seemed to fix my high idle problems. Just remember to put some silicone or something on the threads to keep the brass plug from backing out.
At first I thought my copper colored solenoid was weak too, but the solenoid will stiffen up when it gets the right signal. So the spring inside of it doesn't have to be strong.
Once you remove the epoxy and clean out the threads and CAREFULLY remove the brass plug (don't mess it up!!!), everything should be clear as to how it works. All I had to do with mine was screw in the plug a little deeper, and it seemed to fix my high idle problems. Just remember to put some silicone or something on the threads to keep the brass plug from backing out.
Re: IACV question (kirk)
Im trying to understand this IACV a little further. Does the "solenoid" have 2 states (on/off-in/out) OR an Infinite number of positions (variable/analog). Also does the plunger need to be able to "seat" when the solenoid is removed? This thing was full of crud.It seems so, hence the spring. Thanks again
Re: IACV question (s14junky)
If I remember correctly, the solenoid is variable (I don't know if it is really "infinite" though...) The ECU will give it like 100%, 50%, or 0%. Let me drive home from work with my consult and monitor the AAC. I should be able to tell you when the computer sends it a signal, and what % it is actuating it.
If you notice on the solenoid, you can press the actuator all the way into the solenoid body without much force. So YES, the spring must be strong enough to make the plunger seat into the body, with or without the solenoid attached. When activated, the solenoid presses against the spring tension to open the plunger. This lets in extra air after the throttle body, raising the idle.
Be sure once you have the pieces out to clean everything, espescially the aluminum body with B12 or some other kind of cleaner. Clean the spots where the plunger seats, and where the FICD seats.
If you notice on the solenoid, you can press the actuator all the way into the solenoid body without much force. So YES, the spring must be strong enough to make the plunger seat into the body, with or without the solenoid attached. When activated, the solenoid presses against the spring tension to open the plunger. This lets in extra air after the throttle body, raising the idle.
Be sure once you have the pieces out to clean everything, espescially the aluminum body with B12 or some other kind of cleaner. Clean the spots where the plunger seats, and where the FICD seats.
Re: IACV question (kirk)
Just got home and I was wrong earlier The AAC is infinately variable from 000.0% to 100.0%. While just cruising in gear above about 25 mph, the AAC is sitting at 30.0%. If you let off the gas and give it a closed tps signal, it will jump to around 80% and then slowly go down to 50% (takes about 2~4 seconds). It will stay at 50% until you reach a stop, and then it will gradually go down to about 10%. If you take the car out of gear and coast (5spd.) it will stay between 30-40%. When the car comes to a stop, my AAC would fluctuate at about 10.5%~10.8%. I don't know if that will help you in any way, but I've never really watched the AAC closely before...
BTW, if you get really frustrated with it, I've heard of three or four people who have removed it completely and adjust the idle with the throttle cable. But I would consider that drastic, and only as a last resort...
BTW, if you get really frustrated with it, I've heard of three or four people who have removed it completely and adjust the idle with the throttle cable. But I would consider that drastic, and only as a last resort...