Starting to really get cold out there. How well is the system supposed to work in very cold weather. Mine seems to really sputter and not hold at 3000rpms for that little bit of time. Summer time it would work fine. fluid level looks normal & not low.

 

I do not care for the accelerated warm up deal. So when its cold I just put it in gear and hold the clutch in to stop it from working until I get some oil pressure, then I let it do its thing.

 

unplug ACV.

Also shim the oil pellet on the front bolt.

 

Climate has nothing to do with this. The AWS is not there to warm up the engine, it's purely there to warm up the pre-cat. It's bad for the engine and should be removed.

 

^ yup
Start it in gear. But I found that once the weather gets below 50ish, it doesn't kick in anymore.

 

All of you do not care for the AWS? So it does not really have a high degree of importance? Just for precat warm up...

 

The ACV has nothing to do with it.

On a series four, the water temperature switch at the bottom of the radiator is the reason it does not work at very cold temperatures.

It's just for pre cat warm up.

Mine works. By God I paid for it so it's going to work.

 

yeah, the MAZDA engineers knew what they were doing (sarcastic).

They were sensible enough to disable the warm-up when it's too friggin' cold. How thoughtful.

hugues-

 

You're dead right; they knew exactly what they were doing. The AWS was obviously required for the car to meet emissions standards, or it wouldn't be there (JDM FC's don't have it). It was the best solution available with the technology and budget they had at the time. Mazda's engineers would have been well aware that this system would increase engine wear, but if they couldn't meet emissions standards there would have been no RX-7 to sell, so engine wear would be a moot point.

This doesn't mean you should keep the AWS on the car. We're not under the same constraints Mazda were, so engine wear is far more of a priority. Unless you specifically need it on to pass an emissions test (i.e. visual), it should be removed or at least disabled by unplugging the solenoid.

 

If memory serves......the bac also plays its part in the accelerated warmup. Correct me if I'm wrong.

 

i want to dump my AWS... anyone got any info for me? a search pulls up nothing

 

You are not wrong. But removing the ASW solenoid lowers the cold-start rpm and thus reduces the damage caused.

It's been discussed many times, so you need to sharpen your search skills. All you have do do is remove it and cap the connections. Pretty easy.