Injection Pump Timing

Click Here To Visit California Gold Products

Click here for a listing of all HUMMER Network sponsors

The Hummer Knowledge Base

Injection Pump Timing:

There is a mark on your injection pump and a mark on the block. Where the two meet at the very top near the center bolt, these marks should line up. You may have to wipe off the crud to see the marks. To retard it, turn the injection pump towards the passenger's side. To advance, turn towards the driver's side. You will need to loosen the 3 bolts first, I belive they are 15MM. Do NOT adjust this with the engine running, I have heard this can damage the injection pump. It needs to be tight when running, and can only be loose when the engine is off.

Tony

Back to main page

The Hummer Knowledge Base is a collection of informative posts from the Hummer Network forums and mailing lists, contributed material and links to outside web sites.
The Hummer Network is not responsible for the accuracy of the information contained herein or on outside web sites, nor for any situation arising from the use thereof.
© 2006-2011 by The Hummer Network. No material from the Hummer Knowledge Base may be reprinted or republished in any form without permission.