The Top DSM Community on the Web

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. Log in to remove most ads.

Please Support JNZ Tuning
Please Support STM Tuned

Sd map sensor help

This site may earn a commission from merchant
affiliate links, including eBay, Amazon, and others.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Solace Lost

10+ Year Contributor
78
0
Jul 28, 2011
Lagrange, Georgia
So a friend of mine (to be left anonymous) obtained a map sensor for me which came from a military vehicle with a turbo diesel engine. I hooked it up to run SD and its not working out too well. I tried setting it with all the ecmlink presets. It idled ok when set on omni 4 bar, but ran ridiculously lean (like off the wideband lean) and surged like crazy on gm 3.3. With all of the others, it wouldn't run at all. I have no idea what brand it is and I've tried searching the numbers that are molded into the plastic housing and have had no luck. I even tried messing with the user defined voltage offsets but I cant get it to do what I want. Is there a formula or something I could use to try to get this thing to act right? I'm planning on getting an omni 4bar monday. I just wanted to see if this map might be usable. The numbers on the front are 9576-E 5
and on the back it reads 466 and C B A on the back of the connector. Thanks for checking out this post!


You must be logged in to view this image or video.


You must be logged in to view this image or video.
 
Looks like a GM sensor to me too. If this was my car I would just wait till I got the other MAP sensor.
 
Have a Log? Hard to say what is going on... Could very well be some other issue like the tune not the Sensor it's self... . Hard to say with a vague description of what is going on... .

But it could be a few map sensors based of the 466 number

Under the paint it should read right below and before the C B A markings for the Pin output 749 and then to the right a Manufacture date
 
The trick would be getting that paint off without wiping the decal. :)
True might be hard to get off an not take out the markings... .

But it's engraved on most real OEM ones I've seen like this :)
You must be logged in to view this image or video.

OP - Are you sure you wired it correctly?

As well OP,
What is the Map sensor Readings in a log when it is set as a 3 bar map sensor in ECMlink with the car off but keyed on?

In reality there are so many of these "GM Style" housings with who knows what Map really inside of it. In the End if it's not Really a OEM one you may not get the reading you expect with one of the drop down sensors.
 
What is the Map sensor Readings in a log when it is set as a 3 bar map sensor in ECMlink with the car off but keyed on?
I'll second this question. That's really all you care about. What voltage does it put out at a known pressure (i.e., engine off = atmospheric pressure = "about" 14.7 psia)...that'll tell you more about what you've got than all of our combined head scratching might.

To view the voltage, add the "raw" sensor value to your display by clicking on the "raw values" button in the "display values" dialog in ECMLink while viewing a datalog.

Thomas Dorris
 
So a friend of mine (to be left anonymous) obtained a map sensor for me which came from a military vehicle with a turbo diesel engine. I hooked it up to run SD and its not working out too well. I tried setting it with all the ecmlink presets. It idled ok when set on omni 4 bar, but ran ridiculously lean (like off the wideband lean) and surged like crazy on gm 3.3. With all of the others, it wouldn't run at all. I have no idea what brand it is and I've tried searching the numbers that are molded into the plastic housing and have had no luck. I even tried messing with the user defined voltage offsets but I cant get it to do what I want. Is there a formula or something I could use to try to get this thing to act right?

It inst the most scientific way, but... You could just leave it wired to the car, hook a multimeter to pin "B", and hook a compressor to the port and slowly crank up the compressor until you get 5V on the multimeter. That should tell you 2 things...

1. What MAP sensor you have,
and/or
2. If it is even any good.
 
I tried removing the paint, it took the decal off along with it :) I've got it figured out though. It's a 3 bar. It wouldn't crank on it at first, it would just burble and die, but after a few tries she's running beautifully. Thanks for the input d00ds!
 
Support Vendors who Support the DSM Community
Boosted Fabrication ECM Tuning ExtremePSI Fuel Injector Clinic Innovation Products Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications MyMitsubishiStore.com RixRacing RockAuto RTM Racing STM Tuned

Latest posts

Build Thread Updates

Vendor Updates

Latest Classifieds

Back
Top