Hi Rolf..another useful video. Thanks. What can you do about the following? I have fast idle at startup and it continues as I drive. If I drive somewhere and park for shopping for a short time, when I start up , the idle is no longer fast but 600 rpm+-. Once I drive for a while it will "suddenly"return to high idle. If I am parked with motor running, after a while, it will "jump" to fast idle. It seems this has something to do with temperature causing sudden drop or sudden elevation of rpm..My 380se has 120k. I emphasize "sudden" as there is a click and then suddenly rpm goes up. What do the two wires on the Idle control valve connect to? Anything temperature related?? This seems to be heat related.Thanks. RNT
That is most likely the fuel pump relay. With a warm motor and false high idle measure the voltage on the cold start valve. If that is still shows voltage than either the relay is defective or the EZL may also be defective.
I have an 85 380SL and couldn't fix the high idle issue. When engine hot, it goes up to 12-1500 RPM. Took ICV out and cleaned, and it seems operateable with rattling when shake. But my ICV has no brass piece thread at the end to adjust the spring. How do I adjust it?
High idle issues can come from a faulty OVP (causes high idle above 1000rpm), vacuum leaks, unusual would be faulty start up cycle, or ECU. Sorry for not being able to narrow that down precisely.
@@straybenzes Thanks for your reply. I spoke too soon this did actually work, and I found a vacuum leak whilst looking around. I managed to get the idle down to 700 RPM which is good enough for me. Thanks again mate.
@@straybenzes I got it running again. Put in my old fuel pump relay and it started working again. Good thing I kept the old one. If I let the engine warm up I can see some smoke come up from the back of the engine, probably from some sort of oil leak. It doesn't smell like engine oil. What could it be? How do I check it?
@@ChopsticksDIYGarden Yeah, think twice before throwing out old relays. OEM ones are getting harder and harder to find. The smoke situation is best addressed by closely observing the running engine and tracing where it is coming from.; Most of the time leaks have been there a while and therefor there may be a lot of old crusty messes building up over time. Sometimes there is no way around thoroughly cleaning that area with degreaser to you can start tracing the leak's origin better. Six cylinder engines of that era do tend to leak oil towards the back where the engine compartment firewall is. Could be a valve cover gasket but very often it is the head gasket.
You've helped me out with all kinds of problems with my 91 190e thank you
i am glad you liked it. Thanks.
Very helpfull video, thank you!
Thx, glad it helped.
I didn’t know we could adjust them ! Thx for that
Yeah, I know. That i frustrating to learn that they is a way to reduce RPM and smoother running.
Hi Rolf..another useful video. Thanks.
What can you do about the following? I have fast idle at startup and it continues as I drive. If I drive somewhere and park for shopping for a short time, when I start up , the idle is no longer fast but 600 rpm+-. Once I drive for a while it will "suddenly"return to high idle.
If I am parked with motor running, after a while, it will "jump" to fast idle. It seems this has something to do with temperature causing sudden drop or sudden elevation of rpm..My 380se has 120k.
I emphasize "sudden" as there is a click and then suddenly rpm goes up.
What do the two wires on the Idle control valve connect to? Anything temperature related?? This seems to be heat related.Thanks. RNT
That is most likely the fuel pump relay. With a warm motor and false high idle measure the voltage on the cold start valve. If that is still shows voltage than either the relay is defective or the EZL may also be defective.
👍🏻👍🏻👍🏻
thx
I have an 85 380SL and couldn't fix the high idle issue. When engine hot, it goes up to 12-1500 RPM. Took ICV out and cleaned, and it seems operateable with rattling when shake. But my ICV has no brass piece thread at the end to adjust the spring. How do I adjust it?
Hmm. Were you able to get the seal plug out of the ICV?
Hi Ralph, I enjoy your videos, this didn't work for me any ideas what could be the issue? Regards.
High idle issues can come from a faulty OVP (causes high idle above 1000rpm), vacuum leaks, unusual would be faulty start up cycle, or ECU. Sorry for not being able to narrow that down precisely.
@@straybenzes Thanks for your reply. I spoke too soon this did actually work, and I found a vacuum leak whilst looking around. I managed to get the idle down to 700 RPM which is good enough for me. Thanks again mate.
@@ashleybrown9913 Wow, cool!
I need to get my 1989 300E running again. 😁
Good luck. That is a nice car!
@@straybenzes I got it running again. Put in my old fuel pump relay and it started working again. Good thing I kept the old one.
If I let the engine warm up I can see some smoke come up from the back of the engine, probably from some sort of oil leak. It doesn't smell like engine oil. What could it be? How do I check it?
@@ChopsticksDIYGarden Yeah, think twice before throwing out old relays. OEM ones are getting harder and harder to find.
The smoke situation is best addressed by closely observing the running engine and tracing where it is coming from.; Most of the time leaks have been there a while and therefor there may be a lot of old crusty messes building up over time. Sometimes there is no way around thoroughly cleaning that area with degreaser to you can start tracing the leak's origin better.
Six cylinder engines of that era do tend to leak oil towards the back where the engine compartment firewall is. Could be a valve cover gasket but very often it is the head gasket.
👍
Thank you!
NEED HELP S8ME KIND QLARM GOES OF NOT HORN SOMR WHERE UNDER BATTERY BEEPING NOISE WHEN OPED DOOR
With the lights on?