As I pour another shot of brandy....arrghhhhh Ok heres what happened.... I was coming home from work and all of a sudden my 7 would not hold an idle so I looked under the hood and found that one of wire to the ACV was burnt the hell up. It was the air control celiniod valve wire. So I ordered a new ACV, first install I used RTV for my gassket but like an idot didnt wait for it to cure and started the motor. She ran for a minute but would not hold her idle. So I then pulled it off and remounted it with gasket material cut to fit with all the proper cuts I seen from the old gasket. Started her up but again she would not hold her idle. I'm thinking I did something wrong on the install or could it be my TPS is gone too? Help shes sitting on a side street and I neeed her back in my life.


thanks

BLVD

 

ALSO I HAVE check the whole forum for this issue but everyone that has a simliar problem is able to maintain an idle or they have to much idle..


Blvd

 

what the hell no help here

 

An ACV is used almost exclusively for putting airpump air into the exaust ports and at times into the split air pipe.

Another function of the acv is upon deceleration, to inject air into the intake manifold to reduce backfire.

The solenoids on the acv are replaceable. Screw in.....screw out. It's cheaper than another acv.

Either you have a air leak at the gasket or another problem happen at the same time the solenoid on the acv shorted out.

It seems to me, that if the solenoid shorted out, then the fuse should have blown also. That fuse supplies power to multiple items. I think it's the EGI COMP fuse that would have blown. Just guessing.

 

I'll check it out thanks I didnt think about that.


Blvd

 

help nope didnt work? next please please please please

 

Help I'm still down, really suffering here..... SOOO BAD I have to drive a miniVAN to work ....help... So ok I have checked the vvacum hoses ordered a new gasket from mazda for the ACV.....my 7 will start then and run but wont hold an idle and dies, unless I'm on the gas pedal. Also when she dies I ccan only push start it her nothing else will work. So please help me out here this MiniVAN thing is killing me.


thanks


Blvd

 

alright, relax. Count to ******* ten and breathe

So, you can test to see if your ACV is the causing the idle problem by first finding the larger vac hose that connects to the intake. On the S4 NA model, the hose connects to the front bottom of the plenum on the drivers side of the engine bay. Its directly below the ACV valve, and it should run to the other side, wich is the acv. If you have a stuck solenoid, then crimping this hose will let you know. Try and kink the hose and tie it off on both ends or something, then see if she'll hold an idle.

 

It's a brand new ACV the first one burnt the port cylinoid valve wire thats what I initially thought caused the problem but then after replacing it I was having the idle problem. But I will try it tommorrow though any solution is worht a try.


thanks

Blvd

 

The Port Air Solenoid is disfunctional after the first twenty thousand miles of a RX's life. It does nothing after that 20,000 miles.

Air Control Valves do not put air into the intake. They put it into the exaust ports. With one exception. During deceleration the anti afterburn portion of the valve puts air into the intake. This is not done using an electrical signal in any way shape or form. If the acv is truly new, then the problem is not the acv. Unless it is the acv gasket not sealing b/t passages in the acv.

If you still think its the acv, then remove the hose b/t the air filter assy and the airpump. Spray some starter fluid into the airpump feed line while the engine is running. The engine should show NO effect of the starting fluid. If the engine does rev up or down while doing this, then yes, there is an internal leak in the acv from the acv into the intake passage. That is easily overcome by removing the acv and plugging the two holes on the acv that are related to the antiafterburn valve.

A burnt up Port Air Solenoid should have popped the EGI COMP fuse. That fuse feeds all the black/white wires on the solenoid rack plus the two solenoids on the acv.

 

I have been haveing similar problems and recently took my RX to a mech. He knew what he was doing etc... yadda yadda, and it comes down to needing a new ACV but nitherr him nor I seem to be able to find one...
If I may, where did you get your 'new' one? Anybody here got one to spare? or any thing, I have a 1987 TurboII
and suposidle just need a new ACV

thanks