Airbus - Can you elaborate more on this? What got destroyed? Would you like to try this new one?

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Bob
'82 300D Petrol B-G Metallic

Well, I bought the 300D with tach not working. Of course, these little things bother me, so I read about the cigarette butt fix and it worked for a week or so. Then one cigarette butt wasn't enough anymore and I stuffed another one in: worked for a day, etc., etc. At some point it didn't work anymore at all, so I bought a new amplifier. Now guess what: It doesn't work. I checked all wires, and I get the signal to the dash, 12V and ground are good, too, but no reading. I guess, I can't offer you my help, because the tach itself is shot...

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'99 S420, 155k
'91 VW Vanagon GL, 150k
'85 VW Vanagon GL, 120k
'82 VW Westy, aircooled, 165k

Good progress to report on the tach amp replacement front. The unit is working well, and thanks to everyone that has helped with the testing.

The PC board has been released to the board house. To keep the cost down, I've used 4-week (!) turn-around, which puts boards in my hands around March 1.

All the test vehicles have been W123s. I'd really like to get a W126 or even a W116 represented. All you need is the OM617A engine, and the 2 inch tall 'trash can' on the inner left fender. Please note the 1 inch tall 'trash can' on some of the later model W126 and W123 indicates your car doesn't use a tach amp.

Any W126 or W116 takers?

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Bob
'82 300D Petrol B-G Metallic

are you still planning the diag tool? The tach doesnt work on the cd and I would rather not start swapping parts.

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1982 300CD Turbo (Otis, "ups & downs") parts for sale
2003 TJ with Hemi (to go anywhere, quickly) sold
2001 Excursion Powerstroke (to go dependably)
1970 Mustang 428SCJ (to go fast)
1962 Corvette LS1 (to go in style)
2001 Schwinn Grape Krate 10spd (if all else fails)

2nd priority. It suddenly got complicated when I realized that to do this right I need 6 I/O pins on the micro and I chose one that only has 5. My bad. There is a work-around but I'm not ready to tackle it right now.

I'd be happy to send you one of the protos for you to try. It has the self test that was to be part of the diag tool. If it works, you know exactly where you stand. If not, you've still learned something.

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Bob
'82 300D Petrol B-G Metallic

ok that sounds good, send me a PM with the details.

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1982 300CD Turbo (Otis, "ups & downs") parts for sale
2003 TJ with Hemi (to go anywhere, quickly) sold
2001 Excursion Powerstroke (to go dependably)
1970 Mustang 428SCJ (to go fast)
1962 Corvette LS1 (to go in style)
2001 Schwinn Grape Krate 10spd (if all else fails)

No activity in over a year on this thread... is he still planning to make these?

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

I've got a 126 with a non-working tach and just stumbled on this. I'd be interested in either making one of these myself or just about any option besides a new tach amp. I may try and rebuild it to secure all the contacts if I can get all the gunk out of the cap. Anyone talk to him, know if he is still working on this and/or looking for prototype testers? Mentioned above he wanted a 126 to test on.

-TC

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth

I did follow through with this. As of today, there are about 36 units out in the field and working.....

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Bob
'82 300D Petrol B-G Metallic

I have one... Works great. Thanks techguy512!

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Mike
1983 Mercedes-Benz 300SD 270K
1960 Ford F250 62K
1990 Mazda Miata 156k

The thing is Bob, it's not that I'm lazy, it's that I just don't care.

Are there still more available? When my dad pulls his summer car out of storage in a month or so....he will possibly need one. (Tach is the only thing that doesn't work...)

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

I also have one. Worth every penny.

I assume you've had success in the 126 then? I don't forsee any problems/differences from a distance. Congrats on the success and great thinking!

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth

There was a stupid minimum order quantity for PC boards. I probably have half of them left. I build up the units as-needed.

Someone asked if these work in the W126. Success has been achieved in the W116, W123, and W126.

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Bob
'82 300D Petrol B-G Metallic

My W123 tach does not work. Is there an easy check for this? Should I purchase one of your new gizmos?

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83 300TD, 260,000 miles, aka "Dusty"
6 vehicles, 2 cup holders (both in the dump truck)