[raene]

I had the pleasure of driving my girlfriend's 1998 200SX SE-R the past weekend to try and diagnose some of the problems. While I was able to help, the problems are not solved entirely, and in the course of my diagnosis, I noticed something strange.

On the firewall near the brake booster was a little black plastic sensor labelled "Boost" and attached to the intake manifold with a vacuum tube. Obviously being a Honda guy I know a MAP sensor when I see one, and this sucker is definitely a MAP sensor.

So why does the B14 chassis have both a MAF sensor and a MAP sensor? I tried unplugging it and got no codes, so I doubt the ECU is even looking at it. I know for a fact the ECU code that interprets MAP signals are very different from the code to interpret a MAF... so why is it there?

 

[SHAWNATGERBROCK]

Just for fine tuning, also used as part of the OBD2 functions to know what vacuum the engine is at , uses that to monitor EGR, Evap. as wel as other functions ....

 

[MauiBlueGride]

Like he said - only the '98 SE-R has it (guessing the 99+ SE-L's did as well) but I'm pretty sure it was emmissions only.

Chris

 

[raene]

Cool, thanks guys!

 

[totaled200ser]

it was required to be obd2 compliant, the computer doesn't use it for anything but a reference, still a tps/maf based fuel map

 

[FastNX]

It thinks it's a late 80s GM

 

[hondaking96]

Just converted my 98' 200sx and I am running a Greddy E- manage. Is it possible for me to use the boost/map sensor that comes with the car or do I have to use a Greddy boost sensor.