Sources and Hints:

Thankfully, this contribution was first created by Uli “Rennelch” Schmitt and further supplemented and edited by VOLVO-GRUK. You can find detailed and further descriptions and information on settings, preventive maintenance and repairs on these websites:

In der Werkstatt – D-Jetronic

Das D-Jetronic Kompendium von Dr-DJet

Instandsetzung Einspritzventile:

Zusatzluftschieber (ZLS) Hermann Ebner:


Customer feedbacks / References

  • Mike Compston
    “PCB installed with no trouble, just had to relieve the inner radius a bit. I misunderstood how the switch works! Using your instructions, I found it works perfectly- thank you.” 
  • Joop Berends
    “I received the parts yesterday, today had to buy a cutter for M2 thread, but the exchange of the print was quite easy to do. I just returne from a testdrive and the engine is running much smoother now. The pickup from idle speed is much better now. Thanks for your work on making this alternative print available !!!! My dad will be happy with this modification.” 

  • Matthew Hall
    “I Really appreciate all the help and it’s great to know there are experts still ot there working on these cars. I’d love to do business with you and thank you for helping to spread the knowledge of these cars.”