tach

As you can see from the following video, there is a very small amount of fluctuation on my rev tachometer when idling. https://www.dropbox.com/s/unwpqkoj9ebcagh/Video%2004-12-2014%2020%2047%2033.mov?dl=0 Any ideas on this? Only other notable problem is slight rattle/vibration as revs...

The rev counter is not working in my w123 230e. Everything else is working fine in the instrument cluster. I have been reading on several forums that the problem can be the tach amp. I am assuming that what I have taken a picture of is the tach amp...? The black 'thing'? The posts also say that...

Where I can find tach signal on e 220cdi w211, I need it for taximeter

Twin turbo conversion is almost there. It only failed the MOT on emisions at fast idle speed. I'm hoping that the additional injector controller will sort this out? To wire it up I have to connect to the tachometer feed. Anyone know where I'd find a suitable wire to tap into?

Hi, First foray into diagnostics for me on a Benz. Two problems: 1. Abs light illuminates on reverse, yet 90 % of the time self tests fine and goes off when going forward; 2. Tach' non function all of the time. I read that the OVP relay is problematic on these vintage Mercs, would this be...

I have a problem with my rev counter,on my w201 190 2.5 diesel. I took out the cluster already to see if there's something wrong with the rev counter but I didn't notice anything,I bought a used one from internet to see if there is a fault in the tacho it self but it still don't work. I...