map sensor

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Apr 12, 2012 | 02:19 PM

#16

kweiss

Freshman User

Joined: Jan 2008

Posts: 44

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Quote:

Originally Posted by woodnthings

MAP is what was asked for.

Here are EBP Sensor pins.

DO you also have any test procedures or test values for this sensor. I have the ability to bench test this device but not sure what my values should be.

Thanks, Kevin

Apr 12, 2012 | 03:30 PM

#17

Tugly

Hotshot

Joined: Jan 2011

Posts: 18,849

Likes: 179

From: Puget Sound

Quote:

Originally Posted by kweiss

DO you also have any test procedures or test values for this sensor. I have the ability to bench test this device but not sure what my values should be.

Thanks, Kevin

I think it's supposed to be close to 5 volts in place, engine off (like about 4.5) but I am unsure - I looked through all my data and I never measured the volts. I think this is a capacitive sensor, which would rule out reading ohms.

Apr 12, 2012 | 04:03 PM

#18

timmyboy76

Lead Driver

Joined: Sep 2010

Posts: 7,793

Likes: 50

Tugly, back to the MAP, if plugs' reading the 5v, how will that tell me/anyone, the sensor is good?

Apr 12, 2012 | 04:04 PM

#19

Tugly

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Joined: Jan 2011

Posts: 18,849

Likes: 179

From: Puget Sound

Quote:

Originally Posted by Tugly

Now I'm going to publicly argue with myself - just to show I'm not choosy who I pick on. I have the official document for the voltage readings on the EBP sensor output (middle wire).

0 = 0 PSI (or perfect vacuum) if you see this, it's a bad sensor or you are standing in the wrong place at the wrong time. 1.25 volts for every atmosphere/Bar/100 kPa (about 15 PSI) up to 5 volts, or 60 PSI max. 1.25 Volts is what you should see engine off.

1.25 Volts = 15 PSI
2.50 Volts = 30 PSI, etc...

Apr 12, 2012 | 05:00 PM

#20

PaysonPSD

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Joined: Nov 2007

Posts: 9,549

Likes: 14

From: Payson, AZ

Quote:

Originally Posted by Tugly

0 = 0 PSI (or perfect vacuum) if you see this, it's a bad sensor or you are standing in the wrong place at the wrong time. 1.25 volts for every atmosphere/Bar/100 kPa (about 15 PSI) up to 5 volts, or 60 PSI max. 1.25 Volts is what you should see engine off.

1.25 Volts = 15 PSI
2.50 Volts = 30 PSI, etc...

That's some good info. Thanks.

Now dig around and find that info for the MAP.

Reps sent.

Apr 12, 2012 | 05:20 PM

#21

woodnthings

Cargo Master

Joined: May 2010

Posts: 3,047

Likes: 10

From: Snohomish, WA

Quote:

Originally Posted by kweiss

DO you also have any test procedures or test values for this sensor. I have the ability to bench test this device but not sure what my values should be.

Thanks, Kevin

Here is the manual for troubleshooting the EBPS.

Attached Images

Exhaust Back Pressure Sensor.pdf (36.9 KB, 2179 views)

Apr 12, 2012 | 07:44 PM

#22

Tugly

Hotshot

Joined: Jan 2011

Posts: 18,849

Likes: 179

From: Puget Sound

Quote:

Originally Posted by PaysonPSD

That's some good info. Thanks.

Now dig around and find that info for the MAP.

Reps sent.

My... aren't we the bossy one.

The MAP sensor is not linear like the EBP, so this image is from the book.

Attached Images

Apr 12, 2012 | 08:32 PM

#23

PaysonPSD

Post Fiend

Joined: Nov 2007

Posts: 9,549

Likes: 14

From: Payson, AZ

Quote:

Originally Posted by Tugly

My... aren't we the bossy one.

The MAP sensor is not linear like the EBP, so this image is from the book.

Thanks Tug.

I have AE but it is nice to have a way to check some things with a VOM.

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Apr 13, 2012 | 06:19 AM

#24

kweiss

Freshman User

Joined: Jan 2008

Posts: 44

Likes: 0

Wow, again this site did not let me down! I will trouble shoot my sensor and report what was found......
Thanks to all who weigh in....

Kevin

Apr 16, 2012 | 05:20 AM

#25

kweiss

Freshman User

Joined: Jan 2008

Posts: 44

Likes: 0

Quote:

Originally Posted by kweiss

Wow, again this site did not let me down! I will trouble shoot my sensor and report what was found......
Thanks to all who weigh in....

Kevin

SO far it looks as though the tube from the manifold up to the sensor was more than half way up the tube plugged with soot and it appears that that sensor is stuck on one value. Looks like a new sensor is in the near future....

This site Rocks!

Kevin