Why do a fuel system flow and pressure test? Without one, you will not know if your fuel injection is working properly. This is even more pronounced on K-Jetronic engines that incorporate a warm-up regulator. And guess where that is located on the M110 engine? Watch the YouTube video below, and Kent will explain why he has a specific fuel system pressure tester just for the M110 engine.
Product Details
Included with the basic test unit. Special fittings are only available here and are modified by Kent in our shop.
FOUR EXTRAS will be included with this kit to increase the ease and accuracy of your tests.
- 12-volt power test lead for the warm-up regulator
- Hose and fitting to attach to the fuel distributor for the fuel flow test
- Short switched jumper lead to use on the W116, W123, and W126 with a relay near the firewall.
- Long 5-foot jumper lead for the fuel pump relay in the R107 ( relay is behind glove box ).
Do you have more than one Mercedes requiring different pressure testers? Are you not sure which one to order? Be sure to check out my ALL-IN-ONE kit that will test almost everything from the early 1970s to the late 1990s. See the related products below.
The stainless steel gauge is liquid-filled, which provides better accuracy, as well as protects the sensitive mechanism from abuse. Do not rest the gauge on the engine while testing; hang it off the engine somewhere in the engine compartment for viewing. Note that the gauge is not full of liquid, and that is normal. There must be some air in the gauge to allow the needle to move freely.
Kent has eliminated the quick-disconnect fitting at the tee on the lower hose. Quick-disconnect fittings have proven problematic over time. You will still be able to disconnect the gauge. When you screw it down onto the long hose, tighten it only finger-tight; do not use a wrench or pliers, or you'll damage the seal.
Regarding the bottle attached to the tester. This is to allow you to release pressure and fuel from the tester BEFORE you disconnect it from the engine. Please keep the bottle upright while doing this, as there is a very small hole under the cap that allows the bottle to vent pressure. If you lay the bottle on its side, it can leak fuel out very slowly.
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