W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

92 300D 2.5T - Carbon Sludge in Crossover and Intake

I purchased this vehicle about 18 months ago with 153K. It is not a daily driver. When driven it is on trips of several hundred miles at 75 - 80 mph. I recently had the vacuum shutoff valve go bad at approximately 160K. I decided if I was going to replace the shut off valve I would do a complete glow plug replacement, replace injector nozzles then balance injectors and of course replace the return fuel lines. I purchased evrything threw Mercedes Source and the job has been straight forward.

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1984 190D Cylinder 3 Misfires

My 1984 190D 2.2L sounds like it's missing on one cylinder, there is a chuffing sound coming from the tail pipe. There is also a knocking sound that is most easily heard when letting off the throttle.

I did a compression test and all four cylinders were between 420-440 psi which was encouraging. Then I ran two cans of diesel purge through but there was no change, even while the car was running on the diesel purge.

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83 300sd VACUUM?

symptoms include.... door locks dont work.... well sometimes i come out and some doors are locked and battery is dead.. (vacuum pump running?), air dont blow out rite vents, takes a long time for heat to blow hot even if engine is at oper temp.... minor delay in shutdown of engine.... i hooked up mityvac to ignition vacuum line and it slowly leakes down.... normal?

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