ACV help
ACV help
Hey i recently got my rx7 and it was missing all of its emissons equipment and one of the components that was missing was the air control valve. I got a new airpump and ACVand connected them.
The only problem i have is that there is wires coming out of the ACV and i have nothing to connect them to so there is nothing making the valve open so that air can get into the engine.
So my question is that is there a way to take the ACV apart and maybe jam the valve open alittle so that some air goes into the engine? or am i screwed? my dad said he maybe read something about this and i thought this would be the right place to go and ask. thanks
The only problem i have is that there is wires coming out of the ACV and i have nothing to connect them to so there is nothing making the valve open so that air can get into the engine.
So my question is that is there a way to take the ACV apart and maybe jam the valve open alittle so that some air goes into the engine? or am i screwed? my dad said he maybe read something about this and i thought this would be the right place to go and ask. thanks
Hey i recently got my rx7 and it was missing all of its emissons equipment and one of the components that was missing was the air control valve. I got a new airpump and ACVand connected them.
The only problem i have is that there is wires coming out of the ACV and i have nothing to connect them to so there is nothing making the valve open so that air can get into the engine.
So my question is that is there a way to take the ACV apart and maybe jam the valve open alittle so that some air goes into the engine? or am i screwed? my dad said he maybe read something about this and i thought this would be the right place to go and ask. thanks
The only problem i have is that there is wires coming out of the ACV and i have nothing to connect them to so there is nothing making the valve open so that air can get into the engine.
So my question is that is there a way to take the ACV apart and maybe jam the valve open alittle so that some air goes into the engine? or am i screwed? my dad said he maybe read something about this and i thought this would be the right place to go and ask. thanks
Rotary Freak
Joined: Jul 2008
Posts: 1,660
Likes: 2
From: FORT WORTH TEXAS
The two solenoids and the two elect plugs on the ACV..........have little to nothing to do with passing emissions.
PORT AIR solenoid.........diabled after the first 20,000 miles on the car.
SPLIT AIR solenoid.........only opens when you select fifth gear.
The ACV is CONTROLLED by two vacuum signals. One from the Relief solenoid and the other from the Switching solenoid. See FSM for how to check out a ACV. FUEL AND EMISSIONS seciton.
PORT AIR solenoid.........diabled after the first 20,000 miles on the car.
SPLIT AIR solenoid.........only opens when you select fifth gear.
The ACV is CONTROLLED by two vacuum signals. One from the Relief solenoid and the other from the Switching solenoid. See FSM for how to check out a ACV. FUEL AND EMISSIONS seciton.
Yea ive tried passing twice with no luck so right now im just giving it a tune up and trying to find as much emmisions equipment i can find and put it on the car before i go and try again and i was wondering if the ACV is a big part of passing?
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Rotary Freak
Joined: Jul 2008
Posts: 1,660
Likes: 2
From: FORT WORTH TEXAS
The ACV sends fresh air to the EXHAUST PORTS where it mixes with the exhaust gas prior to going into the converter..
After you get into the 15-25 mph tests the air is sent to the exhaust ports thru the split air pipe partly. But since your in closed loop above ??? 15-17 mph, the 02 sensor now leans the mixture out a bit. So if one is not passing both 15 and 25mph tests BUT does better on the 25mph test..........most likely the car is going into closed loop. IF there is no noticable improvement in the 25mph test over the 15mph test....I'd suggest the 02 sensor is not sending a signal to the ECU or at leas the signal isn't getting into the ECU so it can go into closed loop.
A lot of times just replacing the main cat will let a car pass or come real close to doing so. An aftermarket catalytic converter will work just fine. Factory converters cost tooooo much for so little improvement.
There's all sorts of tests for the ACV right there in the FSM that's free and online.
Again, the ACV is controlled by the blue relief solenoid and grey switching solenoids and they in turn are controlled by the right setting of the TPS.
After you get into the 15-25 mph tests the air is sent to the exhaust ports thru the split air pipe partly. But since your in closed loop above ??? 15-17 mph, the 02 sensor now leans the mixture out a bit. So if one is not passing both 15 and 25mph tests BUT does better on the 25mph test..........most likely the car is going into closed loop. IF there is no noticable improvement in the 25mph test over the 15mph test....I'd suggest the 02 sensor is not sending a signal to the ECU or at leas the signal isn't getting into the ECU so it can go into closed loop.
A lot of times just replacing the main cat will let a car pass or come real close to doing so. An aftermarket catalytic converter will work just fine. Factory converters cost tooooo much for so little improvement.
There's all sorts of tests for the ACV right there in the FSM that's free and online.
Again, the ACV is controlled by the blue relief solenoid and grey switching solenoids and they in turn are controlled by the right setting of the TPS.
Joined: Mar 2001
Posts: 31,833
Likes: 3,232
From: https://www2.mazda.com/en/100th/
The ACV sends fresh air to the EXHAUST PORTS where it mixes with the exhaust gas prior to going into the converter..
After you get into the 15-25 mph tests the air is sent to the exhaust ports thru the split air pipe partly. But since your in closed loop above ??? 15-17 mph, the 02 sensor now leans the mixture out a bit. So if one is not passing both 15 and 25mph tests BUT does better on the 25mph test..........most likely the car is going into closed loop. IF there is no noticable improvement in the 25mph test over the 15mph test....I'd suggest the 02 sensor is not sending a signal to the ECU or at leas the signal isn't getting into the ECU so it can go into closed loop.
A lot of times just replacing the main cat will let a car pass or come real close to doing so. An aftermarket catalytic converter will work just fine. Factory converters cost tooooo much for so little improvement.
There's all sorts of tests for the ACV right there in the FSM that's free and online.
Again, the ACV is controlled by the blue relief solenoid and grey switching solenoids and they in turn are controlled by the right setting of the TPS.
After you get into the 15-25 mph tests the air is sent to the exhaust ports thru the split air pipe partly. But since your in closed loop above ??? 15-17 mph, the 02 sensor now leans the mixture out a bit. So if one is not passing both 15 and 25mph tests BUT does better on the 25mph test..........most likely the car is going into closed loop. IF there is no noticable improvement in the 25mph test over the 15mph test....I'd suggest the 02 sensor is not sending a signal to the ECU or at leas the signal isn't getting into the ECU so it can go into closed loop.
A lot of times just replacing the main cat will let a car pass or come real close to doing so. An aftermarket catalytic converter will work just fine. Factory converters cost tooooo much for so little improvement.
There's all sorts of tests for the ACV right there in the FSM that's free and online.
Again, the ACV is controlled by the blue relief solenoid and grey switching solenoids and they in turn are controlled by the right setting of the TPS.
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