Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Vintage Mercedes

LinkBack Thread Tools Display Modes
Old 03-02-2018, 06:47 AM
Registered User
Join Date: Dec 2017
Posts: 5
R107 pressure sensor 0280100012

Hi. Can anyone tell how it work and what depends on this mechanism?
The car has 3.5 m116 engine. At first the fuel mixture was very rich. I found that air and collant sensors were damaged. So i changed them. Now, after 10-20 min of running engine the spark plugs make side sparking. And they are black.
I don't know what to do except turn a bit that plastic screw on computer.
Then i disassembeled this pressure sensor 0280100012 and found more rust than parts in it.
Does it regulate mixture? Can i expect better air fuel ratio?
Reply With Quote
Old 03-02-2018, 09:03 AM
Registered User
Join Date: Feb 2011
Location: Modesto CA
Posts: 2,318
That manifold pressure sensor is the main sensor of engine load, and is the principal source of information used to control A/F ratio. The screw on the ECU affects mixture only when the throttle is closed, and the engine idling.
Reply With Quote
Old 03-02-2018, 09:44 AM
Registered User
Join Date: Dec 2017
Posts: 5
Thank you.
There appeard another problem. I got another sensor and now the engine started pulsating very much. To 1500 rpm and more.
That air thermostat doest shut completely and the engine reached 80c. Main air valve is closed when idle, but when I put my arm on the hole, it sucks pritty strong.
What can be wrong? Or just too much air from there or there?

Last edited by Edgaras; 03-02-2018 at 09:46 AM. Reason: Mistake
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 05:03 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page