300SL R129 lumpy tickover...

DSB SL AMG

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Hi all,

In the 300SL (R129) yesterday, it was a really hot day...got into a long traffic jam 20mins, gradually when in Drive with foot on brake the engine started to sound really 'lumpy' to the point as I was getting worried it would cut out, if I put it into neutral all was fine, engine oil pressure and temp gauge both normal....later on drove home, no issues, car runs fine...any ideas?

Cheers,
DSB.
 
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rayhennig

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Hi all,

In the 300SL (R129) yesterday, it was a really hot day...got into a long traffic jam 20mins, gradually when in Drive with foot on brake the engine started to sound really 'lumpy' to the point as I was getting worried it would cut out, if I put it into neutral all was fine, engine oil pressure and temp gauge both normal....later on drove home, no issues, car runs fine...any ideas?

Cheers,
DSB.

Which engine is that, the M104.980?

R
 
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DSB SL AMG

DSB SL AMG

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Its the old 3ltr straight 6...not sure of engine code...
 

television

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if not the 24v it is 103.984, I will try and find my list of things
 
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DSB SL AMG

DSB SL AMG

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Mines 12v... any ideas on possible causes?
 

television

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I will find the list after dinner:D
 
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DSB SL AMG

DSB SL AMG

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Thanks Malc...I am thinking that due to the hot weather something is either starting to fail (CPS?) or is starting to break down (leads, plugs etc)...


I will find the list after dinner:D
 

rayhennig

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Thanks Malc...I am thinking that due to the hot weather something is either starting to fail (CPS?) or is starting to break down (leads, plugs etc)...

I think it goes for both the 6s, HT components should be best quality and in tip top condition.

R
 

robparker

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Yea, ignition parts are the 1st place to start, and even if they dont cure it, its not wasted money. But after that you are getting into more expensive parts.
 
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DSB SL AMG

DSB SL AMG

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Thanks Rob...just had interim service...will do major service next year, including plugs, leads, dizzy cap etc...


Yea, ignition parts are the 1st place to start, and even if they dont cure it, its not wasted money. But after that you are getting into more expensive parts.
 
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