old Mercedes OVP relay repair . 560 SL shown

[@EndritVj]

Although I don’t own this model I want to thank you for taking the tine to film and upload. High five bro!

[@fupabox]

Happy to help!

[@santana6678]

Great work thank you for the details much appreciated keep them coming my friend 🤙

[@fupabox]

Thanks, will do!

[@SchwarzeTulpe]

If it isn't the OVP relay the high idle problem might be that cursed air fuel ratio potentiometer that has wear parts in it. It was the issue with both my '91 560SEC's and 420SEL high idle problem. If you go ahead and diagnose and even fix that please do post a video on it. It will be very helpful to owners who maybe stonewalled with parts replacement process of the idle speed valve ($$$) and idle speed control module that does not give the desired resolution. Although I do not own a K-Jetronic car anymore this video was helpful in the case I ever buy another again. OVPs were once relatively inexpensive but not anymore. 😢

[@fupabox]

working through the possible causes one by one ATM. 8-900 rpm hot idle, down to 600 in gear with foot on brake. Slight lumpy idle . prob a dirty/worn injector or possibly a vacuum leak i have yet to find .1/4 inch hose stethescope method lol. S moke test next .Doesn't seem severe enough for a fuel distributor issue, or idle module. I'll definately post everything I test .

[@gordonhblair]

how do you bench test this model of OVP relay with a multimeter? What pins do I check, which one is Hot? Ground? and what should my readings be on the other 2 pins?

[@brentkhack6404]

Does it pull straight out of the car?

[@fupabox]

Yes 👍

[@kchilz32]

I have a few from when I had my w202 which I miss

[@fupabox]

im always on the lookout for another w202. see mint ones once in a while , but waiting for a c360 to show up :)

[@kchilz32]

@@fupabox that would make for more great content

[@johnb3341]

Nice job!

[@Gr3eGo]

There is a relay inside this relay, and cooper contacts inside should be refubrished.

[@viperwizard491]

thats not rust. it is soldering flux. someone soldered long time ago (possibly factory repair to not scrap)