FC_mania

I am using microtech and has eliminated the afm and the boost sensor.

Now i have a PLX M500 unit and would like to datalog the manifold pressure as well. I dont know where to tap the signal which can reads manifold pressure. pls advise

thanks

Infini IV

You tap into a signal which will read manifold pressure... lol.

NZConvertible

If you're using a MicroTech you must have a MAP sensor hooked up to it. Tee into that line.

FC_mania

there is a map sensor but it is inside the microtech case itself.

i've heard of people tapping it on the pressure sensor of the AVCR but i dont have an aftermarket electronic boost controller.

any help ?

SureShot

We don't mean the internal atmospheric pressure sensor.
You're looking for the sensor connected by a hose to the lower intake.

FC_mania

do u have a diagram to illustrate this? because there isnt any hoses connected to my lower intake.

i removed everything. ratnest , afm , emissions etc.....

and by signal what i meant is an electrical signal so i can datalog the manifold pressure not the physical pressure line.

thanks all

Infini IV

You should just let a shop do the work for you. You seem to either misunderstand a lot of people or just really not know what you are doing.

But one last try:
There is a vacuum line running off your ECU unit (as you mentioned, the MAP sensor is within the unit itself). Place a T-fitting into this line to use as your source. You shouldn't have anymore questions regarding this post now

FC_mania

infini: i think u misunderstood me. I mean i need an electrical signal. how can a t-fitting be used for an electrical wire? i know where to get a source for my microtech unit.

right now i need an electrical signal wire to my PLX M500 so i can datalog the manifold pressure.

Evil Aviator

Given that...

1) PLX says it works with any EMS.
2) PLX has your money.

Guess who owes you an explanation? (No, it's not RX-7 Club.com).

http://www.forum.plxdevices.com/

NZConvertible

Exactly, and it must have a vac line connecting it to the manifold. Tee into that line.

FC_mania

thanks all but i think i cant communicate clear enough.... the plx m500 unit doesnt have a port for me to plug in a vacuum line but some electrical wire.....i guess i will ask microtech... see what i can get from them...

thanks again

White_FC

Don't bother talking to microtech...

Unless you want to start taking your unit appart and tracing some points out on the PCB, which I dont think microtech will want to help you with anyway.

You will need to use an external MAP sensor, like the one used for the stock ECU.

FC_mania

white FC: yea now someone understand what im talking about =) , well since i dont have an electronic boost controller or else i can tap it off that pressure sensor of the e.boost controller. so once u go standalone there is no where u can tap to eh... shucks....

Evil Aviator

The unit in question is basically a wideband O2 sensor/logger with analog aux inputs, and that's about it. If you can figure out some way to datalog an electrical aux input with just an air tube, then I would really like to hear it, lol.

NZConvertible

Oh, I see. I though he already had something that could measure pressure.

If you need an electrical manifold pressure signal, you could reinstall the stock MAP sensor. All it needs is 12V (S4 only), 5V (from the MicroTech) and ground, plus a vac line to the manifold, and the signal wire will output a manifold pressure reading.

FC_mania

yea in tech terms , sorry not that good in my language. where can i tap an analog output to feed into the analug aux inputs.

that would sound better.