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-Benz Forum > Mercedes-Benz Tech Information and Support > Mercedes-Benz SL Discussion Forum

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 08-25-2010, 06:50 PM
PANZER's Avatar
Registered User
 
Join Date: Mar 2010
Location: North Central Florida
Posts: 41
Sluggish throttle at start up

New symptom..upon starting the car, it is reluctant to start, runs rough and the accelerator pedal seem unresponsive until warmed up slightly. This is new. It used to fire right up(except when it is warm, still workin on that one) in the morning. I DID however get my O2 sensor issue resolved and my foot is healing nicely thanks to David S Poole!!! I now must 'dial in' my fuel mixture, but does not smell like its running rich, well too rich anyway. The gas pedal seems to bog the motor and will stall if I get too agressive/impatient with it.
I just LOVE my Peaches peeps!

Reply With Quote
  #2  
Old 08-26-2010, 11:43 AM
Registered User
 
Join Date: Aug 2010
Posts: 46
Same problem wih 1990 se 212000 miles

Can it be the cold start valve?
Reply With Quote
  #3  
Old 08-26-2010, 03:43 PM
meltedpanda's Avatar
Certified Benzaholic
 
Join Date: Mar 2003
Location: Central Ky
Posts: 6,268
my guess is timing
__________________
Ron
2015 Porsche Cayman - Elizabeth
2011 Porsche Cayman - Bond,James Bond
Sadly MERCEDESLESS - ALways LOOKING !
99 E320 THE Queen Mary - SOLD
62 220b - Dolly - Finally my Finny! Sadly SOLD
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
19 BMW X5 - Heaven on Wheels
14 38HP John Deere 3038E Tractor -Mean Green
84 300SD, Benjamin -SOLD
71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace
Reply With Quote
  #4  
Old 08-30-2010, 11:22 AM
PANZER's Avatar
Registered User
 
Join Date: Mar 2010
Location: North Central Florida
Posts: 41
Where should the timing be on this thing?

I have just adjusted my timing to SB&RS Degrees. (Starts Better & Runs Smoother) Just cleaned all my plugs as they were dry yet sooted up from running rich. (so much for that manicure) I found my Rotor Button charred on one side...again..Second one in 800 miles..white powder inside cap and inside plug wire boots..contact points seem intact. It is a newer cap and rotor when I got the car. I just changed the rotor button like I said when I changed the oil...and it is burned up again..Should I replace my coil? Is there one? Where is it?
What degrees should this timing be set? I heard it likes it on the advanced side..and which side would that be?
I wouldn't be pestering you with this stuff if Haynes would just publish a book on these things! Chilton is a joke..
Jan
the ever grateful
Reply With Quote
  #5  
Old 08-30-2010, 01:58 PM
meltedpanda's Avatar
Certified Benzaholic
 
Join Date: Mar 2003
Location: Central Ky
Posts: 6,268
year and model again? these cars are coil specific , can you find a part number on it?
__________________
Ron
2015 Porsche Cayman - Elizabeth
2011 Porsche Cayman - Bond,James Bond
Sadly MERCEDESLESS - ALways LOOKING !
99 E320 THE Queen Mary - SOLD
62 220b - Dolly - Finally my Finny! Sadly SOLD
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
19 BMW X5 - Heaven on Wheels
14 38HP John Deere 3038E Tractor -Mean Green
84 300SD, Benjamin -SOLD
71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace
Reply With Quote
  #6  
Old 08-30-2010, 02:19 PM
TylerH860's Avatar
KHAAAAAAN-gress
 
Join Date: Aug 2007
Location: Wichita, Ks
Posts: 5,187
This sounds like a classic fuel delivery problem to me. Most likely the fuel distributor or injectors have crap in them.

Fill the tank, run some BG 44k in it and I imagine it will get better. I've solved a few fuel issues this way.
__________________
1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!
Reply With Quote
  #7  
Old 08-30-2010, 06:36 PM
PANZER's Avatar
Registered User
 
Join Date: Mar 2010
Location: North Central Florida
Posts: 41
1982 380SL salvage yard motor. new distributor and wires, (old ones are in the trunk with old fuel rail and injectors..when I bought it) the dist. cap is dark orange plasitic, the original one was black and had a different number than this one. Inside cap is in goo shape just lots of white powder and plug wire boots were as well.
Would a fuel distrubution issue cause charring of rotor button???
Lucas injector cleaner in the tank now, we shall see...
Oh and Chilton says 5B or 5 degrees BEFORE TDC so it is a little advanced as you all have told me..
I do not know where coil is..so I don't know where to look for part number. duhhhh...
A little knowlege is dangerous and expensive!
Jan
Reply With Quote
  #8  
Old 08-30-2010, 08:08 PM
meltedpanda's Avatar
Certified Benzaholic
 
Join Date: Mar 2003
Location: Central Ky
Posts: 6,268
no fuel distribution would not cause rotor or cap issues, my experiance is this is usually caused by excessive secondary ignition resistance, your ignition wire(s) are wrong/worn or spark plugs that are worn or have excessively large gaps. What happens is when you have too much secondary resistance this causes a high voltage requirement and in turn causes the coil to have maximum output ALL the time, the coil should only see a high requirement during very heavy acceleration and then return to normal levels. or a coil putting out too much , too little
The coil is on the fender , drivers side,central large wire off distributor goes to it
__________________
Ron
2015 Porsche Cayman - Elizabeth
2011 Porsche Cayman - Bond,James Bond
Sadly MERCEDESLESS - ALways LOOKING !
99 E320 THE Queen Mary - SOLD
62 220b - Dolly - Finally my Finny! Sadly SOLD
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
19 BMW X5 - Heaven on Wheels
14 38HP John Deere 3038E Tractor -Mean Green
84 300SD, Benjamin -SOLD
71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace
Reply With Quote
  #9  
Old 08-30-2010, 11:33 PM
PANZER's Avatar
Registered User
 
Join Date: Mar 2010
Location: North Central Florida
Posts: 41
Will get new spark plugs to start, the w9rdc platinum gaps were set at .25 and they are supposed to be set at .32! I opened them up to .30 upon reading some posts on the subject. When I went to parts supplier, the plugs that I have were listed on the screen, it also listed the gap size as .32. After I reset gaps to .30, set timing to B5, dumped injector cleaner in the tank. Runs much better, I also coated the spark plug wire ends with dialectric grease and discovered #5 spark plug was loose from the previous days cleaning. Tightened that puppy up and so far so good.
I looked inside the distrubutor cap and found no R1 or R5 anywhere to indicate voltage rating. Fired her up and heard an ominus low BRUMMMBLE-CHUNK before she started...I have only heard it once before....I was thinking timing chain...
Hubby turned motor ever so slightly to get to TDC with a BF screwdriver to check the position of rotor...maybe he loosened the tension of the chain when he did...ARRG. no damage done.............yet.
Hey, thanks you good people for being so patient with me. I want to know everything
RIGHT NOW! Peach Daiquiris to all!
Reply With Quote
  #10  
Old 08-31-2010, 02:11 AM
jplinville's Avatar
Conservative
 
Join Date: Sep 2008
Location: Dayton, Ohio region
Posts: 302
I wouldn't run with those plugs...The car wasn't designed to run them. Go back to original stock plugs, or you'll be replacing those often.
__________________
1987 560SL
85,000 miles




Meet on the level, leave on the square. Great words to live by

Were we directed from Washington when to sow and when to reap, we should soon want bread. - Thomas Jefferson: Autobiography, 1821.
Reply With Quote
  #11  
Old 08-31-2010, 11:32 AM
Registered User
 
Join Date: Oct 2007
Location: Greater Metropolitan Beaverdam VA
Posts: 2,877
What the Panda said

If you are/were running resistor plugs (WR9DC) and stock wires you are doubling your secondary resistance. Original wires have resistance built into the connectors and are intended for non-resistor plugs.

Reply With Quote
Reply

Bookmarks


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 12:07 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page