ACV issues
07-24-15, 12:50 AM
#1
Full Member
Thread Starter
Join Date: Feb 2015
Location: Cen Californa
Posts: 70
Likes: 0
Received 0 Likes
on
0 Posts
ACV issues
So i just rebuilt my motor, cheers. its running great.
I need to pass the dreaded CA smog, so i can finish the registration and actually drive it. (so please dont bother posting to say just delete it.)
i found this guide
mikes guide to getting your car to pass smog - NoPistons -Mazda Rx7 & Rx8 Rotary Forum
well and great!
till i get to here
"3. in the event that the ACV is not working, it can be for a couple of reasons. the first being the valve is bad. the ACV uses two diaphragms to operate 2 plungers, and the diaphragms fail from the heat. you can either repair, replace, or find some hardware and physically shim the valve open the way you need it to get port air.(i did not shim it and the diaphragms are good)
(so that brings me to....)
the second reason the ACV isn't working is the control system. on an FC this is very common. ECU uses the TPS to turn on or off the two vacuum solenoids, that actuate the valves in the ACV. so the TPS needs to be good, and adjusted. also the vacuum lines NEED to be hooked up CORRECTLY. on the turbo the diagram is NOT good enough, and on the NA its easy to swap the 2 hoses in the front of the intake. if i am at this point, i will disconnect the hose @the ACV and at the solenoid and make sure it is the same hose. "
so i go and check the vac lines, they all appear to be correct, i did replace them all with new lines.
the smog pump just keeps dumping out the relief valve, the solenoid for the relief valve is getting voltage, the switching solenoid is not. unplugging the relief solenoid does nothing. unplugging the vac line to the acv does nothing. hopefully someone on here knows the acv system pretty well and can help me out.
thanks.
I need to pass the dreaded CA smog, so i can finish the registration and actually drive it. (so please dont bother posting to say just delete it.)
i found this guide
mikes guide to getting your car to pass smog - NoPistons -Mazda Rx7 & Rx8 Rotary Forum
well and great!
till i get to here
"3. in the event that the ACV is not working, it can be for a couple of reasons. the first being the valve is bad. the ACV uses two diaphragms to operate 2 plungers, and the diaphragms fail from the heat. you can either repair, replace, or find some hardware and physically shim the valve open the way you need it to get port air.(i did not shim it and the diaphragms are good)
(so that brings me to....)
the second reason the ACV isn't working is the control system. on an FC this is very common. ECU uses the TPS to turn on or off the two vacuum solenoids, that actuate the valves in the ACV. so the TPS needs to be good, and adjusted. also the vacuum lines NEED to be hooked up CORRECTLY. on the turbo the diagram is NOT good enough, and on the NA its easy to swap the 2 hoses in the front of the intake. if i am at this point, i will disconnect the hose @the ACV and at the solenoid and make sure it is the same hose. "
so i go and check the vac lines, they all appear to be correct, i did replace them all with new lines.
the smog pump just keeps dumping out the relief valve, the solenoid for the relief valve is getting voltage, the switching solenoid is not. unplugging the relief solenoid does nothing. unplugging the vac line to the acv does nothing. hopefully someone on here knows the acv system pretty well and can help me out.
thanks.
07-26-15, 02:46 PM
#3
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,770
Received 2,562 Likes
on
1,822 Posts
is the throttle body spacer the right way around?
07-26-15, 06:42 PM
#4
Full Member
Thread Starter
Join Date: Feb 2015
Location: Cen Californa
Posts: 70
Likes: 0
Received 0 Likes
on
0 Posts
Thread
Thread Starter
Forum
Replies
Last Post
rgordon1979
3rd Generation Specific (1993-2002)
40
03-15-22 12:04 PM
