W124 Hot Start/Running Issues
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Joined: Sep 2020
Posts: 5
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300E 2.6L
W124 Hot Start/Running Issues
Good evening, on my drive to work today my '91 300E 2.6L began flashing the ABS light, the SRS light was steadily on and the blower fan was cycling from the fastest speed to off and back repetitively for a few seconds while driving, then shut off and would not crank after dying. This occurred about 20 minutes into my drive, after the engine reached operating temps for a while. The car restarted after it had cooled for about 4 hours, and drove most of the way home before exhibiting the same symptoms and dying again when coming to a stop. Prior to the engine dying, it cycled from about 400 rpms while slowing down to 2000 rpms then the engine died while the tach still showed 1000 rpms until I let off the brake. UPDATE: After letting the car cool again, it no longer will start. It does crank while cold, but does not run. The battery acts like it is out of power when cranking cold, but the battery charge is still good.
Since this seems to be electrical (assuming), but I have no CLE or codes showing in the vehicle, what parts should I be troubleshooting that could cause this issue?
Currently I have verified all fuses are good (checked with ohmmeter), battery has sufficient charge (13.1 V), and the fuse has been checked on the OVP.
The vehicle has 212k on it, received a new transmission at 206k and a new water pump and oil change at 210k.
Since this seems to be electrical (assuming), but I have no CLE or codes showing in the vehicle, what parts should I be troubleshooting that could cause this issue?
Currently I have verified all fuses are good (checked with ohmmeter), battery has sufficient charge (13.1 V), and the fuse has been checked on the OVP.
The vehicle has 212k on it, received a new transmission at 206k and a new water pump and oil change at 210k.
Last edited by rpwilson; Sep 9, 2020 at 09:50 PM. Reason: Adding information to the issue
Member
Joined: May 2017
Posts: 148
Likes: 18
mercedes w123 260e
First this would be the alternator regulater is faulty , replacment is easy in the car. Then fully charge your barttery till it shows 13 volts .
Last edited by Trevor Hadley; Oct 9, 2020 at 08:01 AM.
Thread Starter
Newbie
Joined: Sep 2020
Posts: 5
Likes: 1
300E 2.6L
Thanks for the reply Trevor. I tore into the engine 2 weekends ago and found the problem. The alterator pulley looked like it had been hit by a rock, which bent the "fan" mounted on the alternator shaft (picture attached).
This appeared to have caused a power surge that caused the OVP to become damaged. A new alterator, belt and OVP and it is running like new again. Thanks for the help!
