Wish I could get my hands on a "known good actuator and control module (EA/CC/ISC0) to confirm test. Inde's computer diagnosis indicated control module is ok.

Preious owner must have replaced OVP because it has newer part number.

Going out now to get new digital meter. And will disconnect alternator when testing.

Thanks
Bob

Tested with new Speery digital meter $20 @ Home Depot
Lots of people shopping for lots of stuff, but I controlled myself - made a list for Santa

New meter readings
Benz
Ignition off = 12.40v
Ignition run = 14.50v

Scorpio [to verify meter]
Ignition off = 12.60v
Ignition run = 14.15v

Time to retire the analog tester.

The reason that I asked about the voltage IS that that system is sensitive to excessive voltage...suggest disconnecting the alternator & see if the problem continues.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

Hi Doc

Battery voltage with Alternator disconnected
Ignition Run = 11.79v

I've NEVER seen a bad EA/CC/ISC module! Have seen that it's been called out on the scanner as one of the options but in the final analysis, never seen one bad.

Swap: since you are working with an 'inde', maybe he will notify you when a similiar MB comes for service. That's the best way. If that verifies a good EA, then I'd bet it's the ETA.

If you used one of the providers on my page (Menu#24), I believe they would be happy to exchange it for you.

__________________
Regards . . . . JimF
-------------------
'94 S500 Cpe

Visit my Mercedes Web Page

On closer inspection of the Actuator on your web site (Menu#24) the butterfly appears to be at a 90 deg angle to the barrel.
Before installing mine is definitely not at 90 deg (flat). Is it supposed to be?
It appears to be about 88 deg.
There is no change in the angle with and without the linkage and spring attached.

Also

Using gas pedal, engine will increase RPM until about 4100 rpm then it will feel as if missing severely and will not rev higher.

Any thoughts are appreciated.

Bob

That pic in MENU#24 is the 'dead' one after it was removed. As I recall, a new or remanufactured ETA butterfly (b/f) sits at "88degs" or something close to it. Also you can push on the b/f and it's spring loaded as shown pics.

From your description, I don't believe anything is out-of-order.

__________________
Regards . . . . JimF
-------------------
'94 S500 Cpe

Visit my Mercedes Web Page