Fuel pressure relief valve adjustment - Page 36 - PeachParts Mercedes-Benz Forum

JHZR2 · #**526** 07-14-2019, 10:21 AM

Quote:

Originally Posted by Diseasel300

Hot idle shakes are more likely to be injector or delivery-valve related. If you had fuel pressure or flow issues they'd be far more obvious when under load than at idle.

I know injectors are balanced and clean. Thanks...

whunter · #**527** 07-14-2019, 07:21 PM

Quote:

Originally Posted by JHZR2

All done except lift pump, still have a hot idle side to side shake with new mounts and shocks. Only at idle, smooths beautifully with any throttle. No signs of air anywhere.

Was under the impression that a gauge inline per the FSM would give indication if the lift pump and overflow were working properly to ensure IP has the right flow and pressure.

Aged or bad lift pump valves are a common weak - low pressure cause.

What is your verified idle RPM?

.

JHZR2 · #**528** 07-14-2019, 08:02 PM

Quote:

Originally Posted by whunter

Aged or bad lift pump valves are a common weak - low pressure cause.

What is your verified idle RPM?

.

I’m right at 750, via optical tach on the balancer.

Linkages work/stops touch perfectly at idle and WOT.

FWIW, my 83 would shake similarly but only in the highest heat of summer, after long/hard runs. This one does it just from
Getting up to temp under benign conditions. But with any throttle, this car runs so beautifully and smooth.

Each one has its own (warts) character.

I haven’t taken all adjustment out of the rack dampener, fwiw.