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Old 02-13-2010, 09:33 PM
johnscars johnscars is offline
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Join Date: Apr 2007
Location: San Diego
Posts: 170
124 '87 300TD ABS pulse or power steering problem?

This could be a Tom and Ray "puzzler" for all 124 experts. So here's what's happening. Morning/cold engine start, and turn the steering to the right to back out - the car shudder/pulses like the ABS brakes are grabbing - but I don't really feel the car stopping. Straighten out the wheel and it goes away. Drive straight and it's OK (accelerating) but take a right turn and I feel the pulse again (throught the steering wheel), my foot is off the acceleator, but not on the brake. It is a rythmic pulse, 2-3 per second until I straighten out. Happens if foot is not on the accelerator. Accelerator is the cure!

Pulse is less after car warms up. But sometimes it pulses when going straight. Again, accelerator is the cure.

Per advice on this forum and from MB dealer mechanics, I've changed out the problematic ABS sensors (from the caliper/throug the firewall to the connector on each side) to both front wheels TWICE. Granted they were from junkers, but nothing has changed (more or less pulse) with 3 pairs of good looking ABS sensor cables (for $ale if you need a pair). I've checked the sensor in the rear dif. It also looks good and I can't imagine how it has anything to do with turning the wheel to the right. This has been going on for too long and needs to get fixed. It is starting to sound like a power steering pump problem! Fluids level looks good. 290K on engine (new head gasket, and rebuilt turbo, and spruced up #22 head has it screaming (thanks so much to Sixto), as much as a 6 cyl screams).. but this pulse ... It's got to go! Any ideas, recommendations, suggestions, words-o-wizdom?
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