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 04-26-2003, 04:01 AM
Registered User
 
Join Date: Nov 2002
Location: Austin, Texas
Posts: 179
97 E320 Running Very Rough

Need help
The car was in an accident, has approx 13,000.00 miles
After I start the car it runs almost smooth but when pressing on the gas pedal it starts to backfire and stalls. There was no damage to the engine.
While trying to start the car I disconnected different sensors and plugged them back, disconnected and connected the battery.
What could be the problem?
Thank you
Reply With Quote
  #2  
Old 04-26-2003, 02:03 PM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Look to the air piping between the Air Mass Meter and the throttle assy. Sounds like you have a big air leak.
__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
Reply With Quote
  #3  
Old 04-26-2003, 02:25 PM
Registered User
 
Join Date: Nov 2002
Location: Austin, Texas
Posts: 179
Thank you
I will look at it this afternoon
Reply With Quote
  #4  
Old 04-26-2003, 05:02 PM
Registered User
 
Join Date: Nov 2002
Location: Austin, Texas
Posts: 179
Thanks Steve

How can I tell if the Air Mass Meter is working properly?
Reply With Quote
  #5  
Old 04-26-2003, 05:23 PM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Its pretty hard to do without some equipment. The prefered way is to look at the adaptation values and test to be sure they are not something else.

If an AMM is the cause of your problem it is pretty bad. The adaptive values should be near the max. Lower partial around 1.25 or above.

The actual output voltage can be read but a 10% skewed AMM would be about impossibly to condemn from the results and it could cause such problems.
__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
Reply With Quote
  #6  
Old 05-10-2003, 02:53 AM
Registered User
 
Join Date: Nov 2002
Location: Austin, Texas
Posts: 179
I looked at the engine compartment, it looks like no demage anywhere to the engine but when the car is running I hear a hissing noise (like some air leak) on the right side of the engine (i can not see anything there the car does not want to run
( BEFORE IT HAD AN ACCIDENT AND I WAS TRYING WITHOUT RAD JUST COOLING PIPES CONNECTED TOGETHER)
the car has about 12000milesdoes not want to run smooth and when pressing the accelerator it back fires

please help
Reply With Quote
  #7  
Old 05-13-2003, 01:24 PM
Registered User
 
Join Date: Nov 2002
Location: Austin, Texas
Posts: 179
When I start the car it is running but rpms are going up and down from 500-700rpm.
When I press on the gas it starts to backfire and or just shuts down, I checked for air leaks but do not see any broken parts anywhere.
What are the possible couses for this one.

Thank you
Reply With Quote
  #8  
Old 05-14-2003, 09:30 AM
inspector1
Guest
 
Posts: n/a
Why not have the OBD scanned?
Reply With Quote
  #9  
Old 05-14-2003, 11:26 AM
Registered User
 
Join Date: Nov 2002
Location: Austin, Texas
Posts: 179
Not sure what is obd but the car is out of town and I need to tow it to the shop ,but I was hoping that I could fix it myself
Reply With Quote
  #10  
Old 05-14-2003, 11:47 AM
Registered User
 
Join Date: Feb 2002
Location: South Eastern, MA
Posts: 1,743
This sounds silly but check to make sure your exhaust isn't plugged or bent. A flow restriction like this will allow the car to start but as soon as you increase flow the car will cut out. Worth checking if the cars been in an accident.
__________________
Afshin

Current:
02 C32 AMG

Previous:
92 500E
84 190E 2.3 5 Spd
Reply With Quote
  #11  
Old 05-14-2003, 11:53 AM
Registered User
 
Join Date: Nov 2002
Location: Austin, Texas
Posts: 179
all exhaust looks untouchedind in perfect shape but maybe the catalityc converter is plugged from overflooding, someone told me but I did not check it yet , is it possible?
Reply With Quote
  #12  
Old 05-14-2003, 12:26 PM
Provo Spain?
 
Join Date: Nov 2001
Posts: 656
Vacuum hose is off?
__________________
1994 C 280 117.5k, White (Good as new)
1997 Toyota Camry 149k Miles (Not so pretty anymore)

1990 190e 2.6 95k (Sold-Should not have)
1981 240d Stick ??? Miles...sold
Reply With Quote
  #13  
Old 05-14-2003, 12:43 PM
Registered User
 
Join Date: Nov 2002
Location: Austin, Texas
Posts: 179
I am going to put the car on the hoist today and look very closely at all vacuum connections.
Any other ideas greatly appreciated
Reply With Quote
  #14  
Old 05-14-2003, 03:57 PM
Registered User
 
Join Date: Nov 2002
Location: Austin, Texas
Posts: 179
Is it possible to check for air leaks with vacuum preasure tester and how would I do it?
Reply With Quote
  #15  
Old 05-14-2003, 04:13 PM
Provo Spain?
 
Join Date: Nov 2001
Posts: 656
I would just check the vacuum connections first and see if something came undone. That's what I thought of when you said "hissing noises". I know many on here recommend the miti-vac or something like that. I haven't used one yet, so maybe somebody will chime in.
__________________
1994 C 280 117.5k, White (Good as new)
1997 Toyota Camry 149k Miles (Not so pretty anymore)

1990 190e 2.6 95k (Sold-Should not have)
1981 240d Stick ??? Miles...sold
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 03:38 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, 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