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 > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 05-29-2007, 02:46 PM
mespe's Avatar
benzbonz
 
Join Date: Feb 2005
Location: Cleveland, Ohio
Posts: 1,792
1988 2.3 190e failed emissions HC and NO twice the limit CO 1/4 limit

Hi all,

Well I still have a problem with my 190e,,,

Here are emission results

Failed tests

HC reading = 302.1 PPM Limit = 181.0 PPM
NO reading = 2736.3 PPM Limit=1313.0 PPM

Passed Tests

CO reading = 0.39 % limit = 1.16 %
CO2 reading = 14.14 % limit = N/A

Gas cap pressure passed

Here's the thread that started it all,,,

1988 190e 2.3 rough idle/stall
__________________
With thousands of Pre-Owned Mercedes parts ready to ship, we are now "mobile friendly" check out
Benzbonz.biz
on your smart phone or tablet.
Reply With Quote
  #2  
Old 05-29-2007, 09:49 PM
mespe's Avatar
benzbonz
 
Join Date: Feb 2005
Location: Cleveland, Ohio
Posts: 1,792
Well my TPS was mal-aligned as some P.O. idiot messed with the factory setting on the throttle valve. New readers,,, take note,,, IF your TPS sensor fails at the conenctor i.e. open circuit at idle, check the butterfly adjustment on the throttel valve,,, DO NOT CHANGE IT, it's factory set,,, just check to see if someone else changed it before you go and pull the throttle body off the valve to be able to remove the TPS
__________________
With thousands of Pre-Owned Mercedes parts ready to ship, we are now "mobile friendly" check out
Benzbonz.biz
on your smart phone or tablet.
Reply With Quote
  #3  
Old 05-30-2007, 11:09 AM
Registered User
 
Join Date: Jun 1999
Location: Surrey, Beautiful British Columbia, Canada
Posts: 750
bite the bullet ... change your cat!
__________________
joel

Prayers bring forth enlightenment.
Reply With Quote
  #4  
Old 05-30-2007, 11:34 AM
david s poole
 
Join Date: Mar 2005
Location: dallas
Posts: 1,822
i think you might be better off replacing the fuel distributor.available for 350-400 rebuilt and calibrated.guar is 18mths.it seems as though one or two cylinders have to run rich in order to carry the lean ones.you didn't give the oxygen readings which might confirm this.
__________________
David S Poole
European Performance
Dallas, TX
4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
http://www.w108.org/gallery/albums/A...1159.thumb.jpg
Reply With Quote
  #5  
Old 05-30-2007, 12:18 PM
Registered User
 
Join Date: Dec 2000
Location: AL
Posts: 1,219
Just bring it to Alabama.

We don't inspect anything here and if you can push it into the street, you can drive it.

__________________
2012 E350
2006 Callaway SC560
Reply With Quote
  #6  
Old 05-31-2007, 12:05 AM
mespe's Avatar
benzbonz
 
Join Date: Feb 2005
Location: Cleveland, Ohio
Posts: 1,792
Quote:
Originally Posted by david s poole View Post
i think you might be better off replacing the fuel distributor.available for 350-400 rebuilt and calibrated.guar is 18mths.it seems as though one or two cylinders have to run rich in order to carry the lean ones.you didn't give the oxygen readings which might confirm this.
You own stock in a fuel distributor remanufacturer? This is the second time you've told me to replace the fuel distributor and you haven't even heard/seen the car running, I PM you asking you for help and I get no response, so,,,

Car runs much better after aligning the TPS, idle RPM dropped from 1200 to 750 like it should be, need to check lambda again as now it seems the car is running properly. Who knows maybe I fixed a vacuum leak when i pulled the throttle body of the throttle valve assembly to check out the TPS.

For anyone that is interested,,, the TPS is a very simple contact switch. If you have problems with the TPS, first check the adjustment screw on the rear most side of the throttle valve. There is a screw that is factory sealed with yellow stuff. If that's been tampered with, well then your butterfly to TPS sensor is out of adjustment,,, no need to pull at that crap when you can readjust the sensor with an Ohm meter.

1 pin goes to WOT contact
middle pin is the common contact
other outside pin goes to idle contact

Looking from the top,,, WOT is about 10 O clock, while idle is at 6 O clock. The center pin travels between 6 and 10 depending upon the throttle position. The center pin does NOTHING in bwteen idle and WOT,,, simple contacts. at idle, 2 is shorted to 3,,, and WOT 2 is shorted to 1,,,
__________________
With thousands of Pre-Owned Mercedes parts ready to ship, we are now "mobile friendly" check out
Benzbonz.biz
on your smart phone or tablet.
Reply With Quote
  #7  
Old 05-31-2007, 12:41 AM
Registered User
 
Join Date: Dec 2000
Location: AL
Posts: 1,219
Quote:
Originally Posted by mespe View Post
You own stock in a fuel distributor remanufacturer? This is the second time you've told me to replace the fuel distributor and you haven't even heard/seen the car running, I PM you asking you for help and I get no response, so,,,
Mr. Poole is one of the better diagnosticians here.

You should be grateful that professionals like him are responding to you, and for free at that!

You might want to ask your questions in the forums. To be expecting detailed help via PM might be asking a bit much.

You could always take your car to the dealership and get out your check book.
__________________
2012 E350
2006 Callaway SC560
Reply With Quote
  #8  
Old 05-31-2007, 09:03 AM
mespe's Avatar
benzbonz
 
Join Date: Feb 2005
Location: Cleveland, Ohio
Posts: 1,792
Brewtoo you may be right,,, but let's looks at some history,,, the following quotes were all made this month (5/2007) by David to various other forum members regarding their performance problems ,,,


i think that you need another fuel distributor.there is too much o2 in the exhaust and that is probably from one or two cylinders not getting the same amount of fuel as the others.if correct you should see o2 levels down to .2 or .3%.try running engine at idle in gear with emergency brake on and open the fuel lines at the distributor one at a time and see if one or two don't make much diff.
__________________

think you might be better off replacing the fuel distributor.available for 350-400 rebuilt and calibrated.guar is 18mths.it seems as though one or two cylinders have to run rich in order to carry the lean ones.you didn't give the oxygen readings which might confirm this.
__________________

sounds like you need a rebuilt fuel distributor/and or a rebuilt warm up regulator.
__________________

have you any idea how many miles are on your fuel distributor?
__________________

plan on replacing the fuel distributor it will save a lot of headaches.
__________________

you probably need fuel distributor.
__________________

go get a fuel distributor,specialtauto.com then you will be at peace with your benz.
__________________


David Poole may be a valuable contributor to this forum, by providing excellent advise, but I see a repeated attack on the fuel distributors,,, Now I don't know if mine is good or bad, but I was told (by David) to replace the fuel distributor before I found out that one plug was cross threaded and had a gap of about 80/1000's. Before I discovered that some PO adjusted the "idle" screw (Actually TPS sensor to butterfly valve calibration). Before even asking if I had checked for a vacuum leak, O2 sensor etc. When I read his post, it's like,,, this mf's crazy to think I'm gonna throw a $400 part at the car if I don't even know that the part is bad,,,

Now there may be some merit to replacing the fuel distributor,,, but what the hey, why not just replace the friggin engine,,, it'll surely run better then,,,

my 2
__________________
With thousands of Pre-Owned Mercedes parts ready to ship, we are now "mobile friendly" check out
Benzbonz.biz
on your smart phone or tablet.
Reply With Quote
  #9  
Old 05-31-2007, 11:27 AM
david s poole
 
Join Date: Mar 2005
Location: dallas
Posts: 1,822
i have recently found out by doing some research on an emmissions dyno that the fuel distributors on all these cars have out of calibration issues.when they reach 120-150kmls there is enough dirt in them to mess up the calibration.just because it runs ok does'nt mean it's good.no i don't own shares or have any connection with specialtauto.com.if i had to recommend a 2000 dlr repair to a client to fix a prob they would call me nuts but now a better product is available for less than 500.my own car would never start easily when warm and i did everything possible except replace the distributor.after replacement it starts easily every time cold or hot,increased mileage from 13 to 18,has a lot more torque and will now easily pass texas emmissions without my having to play with fuel mixture.incidently it still has original cats.
__________________
David S Poole
European Performance
Dallas, TX
4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
http://www.w108.org/gallery/albums/A...1159.thumb.jpg
Reply With Quote
  #10  
Old 05-31-2007, 12:33 PM
Registered User
 
Join Date: Jun 1999
Location: Surrey, Beautiful British Columbia, Canada
Posts: 750
Quote:
Originally Posted by david s poole View Post
i have recently found out by doing some research on an emmissions dyno that the fuel distributors on all these cars have out of calibration issues.when they reach 120-150kmls there is enough dirt in them to mess up the calibration.just because it runs ok does'nt mean it's good.no i don't own shares or have any connection with specialtauto.com.if i had to recommend a 2000 dlr repair to a client to fix a prob they would call me nuts but now a better product is available for less than 500.my own car would never start easily when warm and i did everything possible except replace the distributor.after replacement it starts easily every time cold or hot,increased mileage from 13 to 18,has a lot more torque and will now easily pass texas emmissions without my having to play with fuel mixture.incidently it still has original cats.
well, in my case it is the reverse. changed most everything to no avail.
replaced cat, passed emission test.
__________________
joel

Prayers bring forth enlightenment.
Reply With Quote
Reply

Bookmarks

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 12:30 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