Question about 1993 Mercedes-Benz Mercedes Benz Sl Class

1 Answer

Mercedes 300sl intermittently runs rough

Have changed ht leads plugs and airfilter. Car starts well, runs initially well, then on low rvs stalls and will not accelerate. Seems to be once car is warm and at low revs. No power on acceleration, but then clears and runs again well for a short time. I am thinking lambda sensor may be in need of change. Anyone any ideas please ?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 580 Answers

Change your MAS Mass Air Sensor this will exhibit the problem you have if it is dirty. You can try cleaning it, yet it is normally easier just to replace it

Posted on Jul 20, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

3 Answers

Mercedes Benz c230 w202 is have misfire so how to fix It when I run the car after 50 to 100 meters or sometimes during the starting get to misfire and I was change the fuel pump but its still misfire, any...


This car has coil packs which connect to each spark plug.the spark plugs sit deep under the top cover and need a special plug spanner to remove as the access is narrow and deep.

first check the condition of each plug....replace which the correct type ....make sure they are the correct gap...do not over tighten just a quarter turn after they bite.....run car engine .....if it still misfires then you need to replace the ht leads ....swop them with a new set.....if still misfires then it's the coil packs which are the most expensive part of replacement.i sourced mine on eBay.hope this is of help.as this is electronic ignition the misfire is most likely due to 1. Dirty plugs with incorrect gaps....2.faulty ht leads.... 3. Faulty coil packs....4. Incorrect timing.

Mar 03, 2015 | Mercedes-Benz C-Class Cars & Trucks

1 Answer

We have a 1999 Mitsubishi gallant , we have a miss fire when ever its raining out ? what could be causing this to happen


misfiring is from plugs , HT leads ,moisture in the circuits and injector problems including low fuel pressure. use HT lead bridges to stop leads touching each other, clean out the interior of the distributor cap. ensure that the HT leads are pushed fully home in the cap and on the plugs . clean the distributor outside so the that spark cannot track through the dirt/oil.

Dec 27, 2014 | 1999 Mitsubishi Galant

1 Answer

Daewoo tacuma Just changed my spark plugs and HT leads now enging runs rough and stalls on idle


CHECK YOU FIRING ORDER, YOU MIXED THE IGNITION WIRES, IF IT IS A 4 CYL, FIRST CYLINDER #1 IS NEAR THE BELTS, CHECK COIL WIRES FOR NUMBERS, OR DISTRIBUTOR CAP FOR CYLINDER NUMBER OR COIL PACK FOR CYL #, AND FOLLOW THE WIRES TO THE SPARK PLUGS. MAKE SURE THEY ARE RIGHT, NEXT TIME DO ONE PLUG AND ONE WIRE AT THE TIME.

May 22, 2014 | Cars & Trucks

1 Answer

Car was running a little sluggish, changed plugs and car ran great for 45 minutes then started running rough. checked ignition module, coil packs. all ok. replaced wires, ran better then started running...


Make sure the HT leads are secure. They might be popping off, causing it to not fire on one cylinder. I always change the plugs and leads at the same time to keep them the same age. HT leads break down rapidly and need regular replacement.

Jun 23, 2010 | 1990 Oldsmobile Cutlass Ciera

1 Answer

My car runs rough stalls in first gear and in revearse


think you have damaged the spark plug leads when you pulled them off ,they are only carbon fibre ,not like good old copper ones ,try a new set of leads ,also plugs should be 25th but some of the newer engines use a wider plug gap

Apr 03, 2010 | 2000 Honda Odyssey

1 Answer

2000 Daewoo Lanos intermittently idles rough


check throttle body and pcv hoses and ports for blockage possible carbon build up and sticky iac valve

Jul 19, 2009 | 2000 Daewoo Lanos

1 Answer

Car stalls while driving at high speeds


i would start by checking the spark plugs and leads. if that ok i would think there is a problem with the dispack that the spark plug leads fit to, if its cracked or any rust i would replace.

May 23, 2017 | 1994 Mazda 626

2 Answers

Mercedes clk200 only fireing on two cylinders


There are several things it could be and not necessarily to do with the plugs.

1. did you reconnect the ht leads in the correct order? They must be in the correct firing order.

2. have you tested the HT leads for electrical continuity? The carbon powder type can breakdown easily.

3. Are the HT lead connectors ok? Make sure you have continuity.

Aug 22, 2008 | 1996 Mercedes-Benz C-Class

3 Answers

1993 mercedes sl300 convertable


Hi,
The early 300 SL suffered from dodgy HT leads and spark plugs if not regularly maintained, the problem with Mercedes Benz though is that the cars have so many features that it is almost impossible to diagnose without seeing the car. Some things to try (in this order) are : - Spark plugs, Ht leads, remove and clean Distributer Cap, replacement of HFM sensor (common fault), if none of these help then faults have been known in throttle valves and fuel pumps/filters

Happy fault finding

May 25, 2008 | 1993 Mercedes-Benz Mercedes Benz Sl Class

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

359 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

yadayada
yadayada

Level 3 Expert

75077 Answers

Michael Contreras
Michael Contreras

Level 2 Expert

166 Answers

Are you a Mercedes-Benz Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...