hey guys so today i noticed that my heater does not blow very strongly. i also noticed that my friends rx7 doesnt blow very hard either. is it just that these cars dont have very strong blowers or is ther somting i can fix or modify to make em stronger? just wanted a lil insight

 

In my experience, the foam seals between the heater components (blower box, heater core, ac box,etc) tend to desintigrate and the air gets blown out down there instead of being routed to the ductwork. That would be the first thing to check. The crappy part is... the only good way to fix those seals is to remove the dash.

 

dang.. im not worried about it to the point to take the dash out.

 

on my 87 turbo I have a weak blower, same on my 91 vert. Now on my 91 turbo, she blows like a $100 hooker. I have pulled the dash, and said seals are wrecked, but she still blows great! It has to be electrical. You can hear the differerance when its on.

Im not quite sure how to test it.

 

humm weird. does anyone know whare the inlet to the duct work is outside the car? cuz i was thinking seeing as out cars dont have cabin air firters it might ce cloged up there

 

If its stronger on recirc than vent, then yes... you might have leaves or debris clogging the vent.. but I have never seen that happen. Its under the wiper blade area cover thingy. Comes off pretty easy.

I had two cars that had massively different flows coming out of the dash vents.. one barely had any flow, the other was super powerful (in comparison). The powerful ones had seals intact, the other one did not. I parted out the one with the strong blower and took both blowers out of the cars... put them side by side and tested them.. they both felt as if they were giving the same amount of thrust/cfm. We'll find out for sure when I re-install it into my rebuilt car with new seals.

 

I'm not too impressed with the blower on my car either. I was happ to see this thread because I was about to post about it :P .

 

When I first got my car I had issure with my blower system. After pulling the logicon and re-doing the cold mazda solders it worked great. It is a pain in the *** to pull the logicon!!!

 

my car has some idle issues, one of which is electrical drag. it seems everything gets less power at idle versus 250+RPM above idle speed. is it acting like that or is its output always slow?

 

If you mean it blows at only one speed and one speed only................possibly the transistor on the fan housings TOP FWD side. You need to remove the housing to see it. Probably burnt to a crisp. Remove and replace the fan housing with a servicable one.

 

In my experience with several 2nd gens I would susppect the logicon for your symtom. If possible find/buy(from a wreck) or borrow a logicon from some source and test this first before tearing into the heter etc.

When the logioon fails it can effect fan motor speed vent openings closing etc. etc.

 

My fan goes to all speeds well and is still weak at the vents. It's the seals.