Yet another intermittent stallling problem 190E 2.6 - PeachParts Mercedes-Benz Forum

hornbrod · #1 04-06-2006, 07:37 PM

Wife is complaining about intermittent instant stalling on the 92 190E 2.6, usually when slowing down and making a left turn. Has only done it once for me, but I don't drive it too much. The car had been slow cranking, so I replaced the battery (it was due). Cranks fine now (three weeks later) and battery voltage w/o engine running reads 12.6V, w. engine running charging voltage w. full load applied (lights, A/C, high blower, etc.) is around 13.6V. So it appears the battery and charging is okay. Replaced the OVP with a known good one (not new) from my other 190E, no help. Cleaned all ground and hot terminals I could find w. contact cleaner, no help. Pretty sure this is electrical since the stall is instant. Stalling is worse in warmer weather. Always starts back up instantly. I'm thinking possibly cleaning the Idle Control valve and checking the operating voltage next, then checking for a vacuum leak (hope not). Am I on the right track or missing something obvious? Thanks for your help as always.

Mike Murrell · #2 04-07-2006, 01:53 AM

There's a good write-up in the "DIY Article" section that discusses locating vacuum leaks. Cars this age are likely to have old, hardened hoses that can easily cause this problem

The Idle Control Valve, also referred to here as IACV would also be worth exploring. The SEARCH facility has a lot of history on this device.

Hirnbeiss · #3 04-07-2006, 06:12 AM

your alternator brushes (part odf the voltage regulator) could be due. They last about 120,000 miles.

Tom

Hirnbeiss · #4 04-07-2006, 06:15 AM

what part of 'Bama are you in? I'm in Hoover now but moving away soon.
Tom

hornbrod · #5 04-07-2006, 07:43 AM

I'm from Arab, just south of Huntsville. Have had this 92 since new, and it only has 70K miles. This stalling problem just started about two weeks ago and seems to be getting worse. Has been running great all these years. I'll try the IDS cleaning and check for the ~4V while running, then dig into the vacuum system. Just wanted to make sure I was not missing a common electrical failure that could cause the stalling. I know the causes can be endless.

hornbrod · #6 04-07-2006, 07:54 AM

Typo, meant clean the IACV. Going to have the new battery tested also to be sure. It's the big 49-series Duralast battery from AutoZone. Doubt if it's an alternator regulator or brushes problem - not enought mileage (70K), but will check those also thie weekend.