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2 off R129 SL 500's (SL1 & SL2); W219 CLS 500; W220 S 500; W126 300 SE; SOLD - W203 C200 Kompressor
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164 Posts
Discussion Starter #1 (Edited)
1992 type 129.066 engine M119 shakes severely with Air condition engaged.

Changed the following: coolant sensor; 4 pin blue temp sensor; head overhaul with new gaskets; water jackets; new belt; caps; rotors; plug wires; ASR motor; radiator; plugs; thermostat; fuel pumps; fuel filter; cleaned fuel distributor head micro filter; air temp sensor; water hoses; crank position sensor; oil pressure sender unit; oil level sender unit; Idle COntrol Valve; complete intake manifold hoses; Fuel injectors - after all these new parts when i engage the AC and even worse with the hedlights on full load the engine shakes and RPM drops as if to shut down. Can anyone please help or make any suggestions, much appreciated. thanks. Almost forgot also replace the O2 sensor...
 

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Greek God of the R129
SL500-500SEL-190E
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8,391 Posts
I think that you alternator is not providing the necessary voltage.
Put a volt miter on.
You should have engine running loaded, more then 12.8 but no more then 14.5

Maybe you should replace the volt regulator/ cheap, and maybe the battery?

Before wasting, $$$$ CK the belt. ;)

Regards,
aam.
 

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Premium Member
1986 560SL with M120 V12 Engine, 1988 560SL Stock
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10,209 Posts
1992 type 129.066 engine M119 shakes severely with Air condition engaged.

Changed the following: head overhaul with new gaskets; water jackets;
Which head? how do you replace water jackets. how did it run before you did all this work.
 

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Registered
2 off R129 SL 500's (SL1 & SL2); W219 CLS 500; W220 S 500; W126 300 SE; SOLD - W203 C200 Kompressor
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164 Posts
Discussion Starter #4
it ran worst before all this - it is now better - replaced jackets on both heads... alternator voltage is fine as I have a pioneer stereo which give the voltage reading ... handy to have
 

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92 500SL- Front/Rear ALPs LAZER :: Front/Rear/Arrows RADENSO RC-M REMOTE
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315 Posts
A little known adjustment is available to turn the idle up--- I watched my vietnamese techs adjust it once

After you remove the aircleaner assmbly
Shine a VERY bright light into and down between the middle of the manifold- on the passenger side
Midway down the engine

There is a single screw that adjusts idle```:thumbsup:

WARNING *** I do not know exactly where it is or if the ECU will just readjust idle back down *** :crybaby2:

Do a google search or look at an engine diagram

GOOd Luck !!

Never more than 1/16 turns and keep track how to put exactly where it was if ECU adjusts back down ****** :(

benzman
 

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92 500SL- Front/Rear ALPs LAZER :: Front/Rear/Arrows RADENSO RC-M REMOTE
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315 Posts
Hey kalorb what fuel injectors did you buy and where ??

Ready to change mine now :crybaby2:
 

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Greek God of the R129
SL500-500SEL-190E
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8,391 Posts
Hey kalorb what fuel injectors did you buy and where ??

Ready to change mine now :crybaby2:
Get Botch. ;)

About 8 months a go I replace them on my 500SEL
I Google it, found a place that was $20 less then anywhere.

So I called them, they of course wanted more.
So I insisted that it is false advertisement....

After going to his site, to verify, speak with the manager....
I got them. :)

$160 bucks less, is $160 bucks less.
So look around. ;) Lol.

Regards,
aam.
 
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