1985 BMW 524tdFACTORY OEM SERVICE PROCEDURE

Pressure Transmitter Test

  1. When conducting this test make sure of the following: Engine idle and maximum speed are correct, temperature dependent idle speed boost is canceled, and that injection pump control lever is resting on idle stop.
  2. Connect vacuum pump on top connection of pressure transmitter and vacuum tester on bottom connection. Vacuum should be at more than 14.2 in. Hg.
  3. Hold injection pump control lever in defined angle position with help of Special Tool (13 2 000). In this position the control vacuum should be 9.7 in. Hg with an inlet vacuum of at least 14.8 in. Hg.
  4. If vacuum is not within specified tolerances, it must be corrected by changing length of connecting rod. Shorten rod to increase control boost pressure and lengthen to bring down control boost pressure.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.