MAP Sensor Leak - Miata Turbo Forum - Turbo Kitten is watching you test compression.

PhantomRoadster · **MAP Sensor Leak**

Finally had a chance to calibrate my sensor and retune my map this week so I went out and bought a vacuum pump.

Is it normal for air to escape this fast? MVI_1818 on Flickr - Photo Sharing!
I tested the gun and tube on my thumb and air didn't escape. I am pretty sure the leak was coming from the sensor it self.

I was barely able to calibrate it. I had to pump it while pressing learn.

The values I got for it were:

Low 16 343
High 300 3500

If the map sensor is leaking, could this explain my higher idle when hot?

dgmorr · 03-28-2010, 06:31 PM

Mine never leaked. How much vacuum can that pump generate? If the sensor or line is leaking, then it would create a bit of a higher idle.

PhantomRoadster · 03-28-2010, 06:55 PM

85 kpa

**y8s** · 03-29-2010, 10:08 AM

that's funny, I was just noticing a similar thing over the weekend.

I hooked my mityvac up to the map sensor to recalibrate and it was damned hard to hold in one spot. it was maybe 1/3 as fast as yours at leaking. I noticed pinching the line made the leak stop.

PhantomRoadster · 03-29-2010, 12:01 PM

I pinched the line and used a zip tie. It didn't make a difference.

Prospero · 04-03-2010, 08:34 PM

Hmm, I will go out and buy a gauge tomorrow and see what happens...

I stil have little issues here and there but figured out heat is really a problem right now