on my 87 i have got wht looks like two map sensors on the passenger shock tower the normal n327 and then wht looks like a mitsubishi unit. im wondering wht the second map goes two and wht its for... and yes i did search extensively

 

I've seen something about an atmospheric pressure sensor and "boost sensor", but I've never seen one with both sensors side by side. Must be an earlier model thing?

The boost sensor is the manifold pressure sensor, and the atmospheric pressure sensor is what the ECU uses to adjust the fuel map for changes in altitude.

 

Take a picture. The ATP is normally located inside the car.

 

can't be the atmospheric unless the harness was modified. take a picture, this second box is probably a fuel cut defenser.

 

It's an N/A pressure sensor or "boost sensor". If this were a turbo model for this particular year (1987), the boost sensor would be an N318.

As mentioned above... Post a picture for us.

 

I can't seen to figure out how to upload pics... But I did find another car with the same sensor on here... You can clearly see the sensor in this car but where he mounted his hks sensor I have the n327. The second sensor I'm wondering about is the mitsubishi unit pictured and why I have tht and the normal n/a n327 tht should be on the car as it is an 87 n/a

Here is the link
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/hks-evc-s-install-pictures-basic-walk-through-897378/

 

Are you questioning the round sensor w/the vacuum hose. If so, that is for an automatic transmission.

 

i was going to say, um the exact same thing

 

my car isn't and automatic but tht would explain why i have never seen one... thanks guys

 

Your car was converted at one time as that is the only plausible explanation.

 

yeah i just bought the car and was doing a tune up and noticed it... im changing the trans and diff fluid this weekend so i will be able to check out under the car then.... thanks for the replies

 

Your Double Throttle Diaphragm would have two vacuum hoses if your car was an auto (5 Speeds have but one). Your thermovalve would have three nipples also instead of two found on 5 speed's.