midnightride42

i have 3 problems and i hope to fix all of them with your help.

i have a 87 NA


1) had the car sitting for about a week now cause of the weather here in ohio and i went to start it and it started but i noticed the heater was not working. i can swith to feet and defog etc. but to adjust the speed of it coming out or even just hearing it coming out is not possible. you can feel it slightly but no change in it when i move the swith over to high. and yes it workd previously till now. any help ?

2) when i start the car sometimes it pulsates goes rum rum rum rum . i noticed that it started doing it ones i got two new mufflers put on just the mufflers though not new piping. and sometimes when i go really slow like idleling it does the same. any help?

3) the blower that we have that revs up the engine when we start it all of a sudden before i chaged the mufflers doesnt work anymore either . any help?

please let me know cause it dam cold here in ohio !!

nashman69g

iTrader: (3)

1. Sounds like your logicon(thats what the control box is called) has some bad solder joints...One fix is to fix the joints(there is a write up here somewhere--search for it)...Also the switch could be bad in the logicon...ICEMARK sell them in his online store!http://www.mazdamark.com
2. This sounds like a vacuum leak!
3. I think you are talking about the airpump--it doesn't rev the engine up--it supplies air to help with emissions...If you don't have to worriy about emissions just take it off and block off the inlet to the ACV.If you have emission checks then pull another airpump off of another car in the junkyard or someone on the forumcould sell one to you(ie me)!

J-Rat

iTrader: (2)

2 = TPS

Jahoo88

I have the same heater problem. Car sat a week, now the blower is not working. The relay clicks when i slide the fan speed over.
I unplugged the blower motor and tested with a multimeter. I got from 0.0V with the slider on OFF to 12V with the slider to full so voltage is getting there.

I plugged another blower motor in and voltage only goes to 0.2V on FULL... If i unplug the blower voltage jumps back to 12V.

I tested both blower motors on a battery and they work fine.

So far im stumped!

Icemark

Title edited to better reflect questions

HAILERS

What in the whole wide world of RX is number three talking about?

Rotory

iTrader: (1)

he means the 3000 RPM start up quit working. He was mistaken that some sort of blower caused it

Icemark

I took it to mean the AWS... not sure why he thinks its a blower though... maybe he is hearing the fan kick in?

J-Rat

iTrader: (2)

Thats why I stayed away from it...

Jahoo88

I fixed my heater problem. The blower motor was good. It was the thermal fuse located at the top of the blower fan assembly. You need to take the whole thing out and on top theres a metal heatsink. Take that apart and test the fuse inside.

this is a good link for FC heater problems

https://www.rx7club.com/showthread.p...t=thermal+fuse

Jahoo88

I fixed my heater problem. The blower motor was good. It was the thermal fuse located at the top of the blower fan assembly. You need to take the whole thing out and on top theres a metal heatsink. Take that apart and test the fuse inside.

this is a good link for FC heater problems

https://www.rx7club.com/showthread.p...t=thermal+fuse

Jahoo88

I fixed my heater problem. The blower motor was good. It was the thermal fuse located at the top of the blower fan assembly. You need to take the whole thing out and on top theres a metal heatsink. Take that apart and test the fuse inside.

this is a good link for FC heater problems

https://www.rx7club.com/showthread.p...t=thermal+fuse