Kent's New 12-part 722.3 and 722.4 overhaul video series INTRODUCTORY SALE now! CLICK HERE to view.
Works on all models from 1977 to 1993 with the Bosch C.I.S Fuel Injection system - see models listed below: Now you can do it yourself on the bench with this inexpensive tester- Save big $$. Ever wonder how well your old CIS fuel injectors are working?
If you think CIS fuel injectors can just be ignored, think again. Sure, your gas engine will continue to start and run “ok”, but you may find that it is not producing the power it once did nor the fuel mileage it once delivered.
NOTE: Basic Tester is available without extras below.. NOTE: Special fitting is recommended for the M110 engine. SEE RELATED PRODUCTS below to order either one. Now, with upgraded fittings.hose connections, and control valves to prevent leaks.
In this 20-minute instruction video, Kent will show you how to take his short kit and combine it with a tester that you can purchase online to make a leak-free, reliable, and accurate fuel pressure tester for Bosch CIS fuel injection.
This tester is a "must have" if you want to work on and troubleshoot the fuel injection system on your 30-year older gas fuel injected Mercedes engine. Let's face it. Thirty years is old, but 55 years is ancient. You can not fix the system if you don't know what it is doing!
This video is specific to K- jetronic fuel-injected engines from 1976 to 1985. This includes the 350, 450, and 280 engines in the R107, W116, W123, and early W126 gas Mercedes. In this 29-minute video. Kent will show you how to hook up the gauge, run the fuel pumps, and complete the test.
There are a few factory recommend procedures and tests you should do before you do an actual pressure test on a CIS fuel-injected engine. In this 20-minute training video, Kent will walk you through these procedures step-by-step.
In this video, you will see how the gauges are hooked up to a 560SL and how the pressures are read. The length of this 30-minute shows the detail Kent has put into filming all the critical components of doing a KE-Jetronic fuel system pressure test.
After completing the pressure test on your CIS engine, you discover a problem. But how can you find out how to isolate and fix it? This is going to require some research on your part. Start by learning how the system works and how each component plays a part.
We know that many of you own multiple Mercedes, including both gas and diesel models. If you own one of Kent’s fuel injector pressure testers you no doubt will want to test all your applicable mechanical fuel injectors in both types of older engines.
To do proper system testing on CIS fuel injection, you must find a way to get the fuel pump or fuel pumps to run continuously without the engine running. This can not be done by just using the ignition key. In this 15-minute training video, Kent will show the options available to do this.
In this short video, Kent will give you an overview on setting up and using Version 3 of his bench mount CIS gasoline injector pressure tester.
If you acquire an older Mercedes diesel and want to test those large Bosch injectors with your V3 gasoline bench tester, you will need 4 things to complete the conversion: 3000 PSI gauge, our new capture bottle to hold the larger injectors, injector sealing kit, and Kent’s written manual and vid
Most 1988 to 1993 6 cylinder CIS fuel injection delivery (FID) systems are old and tired and have not been properly maintained. These include the W201 190E 2.6, the W124 260E 300E, 300CE, 300TE, the W126 300SE, and 300SEL, and the R129 300SL.
For all MBZ diesel engines 1950 to 1999. Designed by Kent Bergsma. These are built at Mercedessource to control quality and production demands. Each one is tested here in our shop before shipping.
With these old gas fuel injectors, sometimes you just have to "back flush" the insides to restore them to peak performance. There is no guarantee that back flush cleaning will restore every old gasoline mechanical fuel injector. Some are just plain worn out.
In the 14-minute video, Kent will show and explain his new version 3 fuel system pressure tester released in January 2025, and will demonstrate briefly how it is hooked up to the D-Jetronic, K-Jetronic, and KE-Jetronic fuel injection systems.
This 24 minute on demand training video comes with our injector back flush cleaning kit. You can purchase this video separately, but please keep in mind you will not have any of the tools or supplies to complete this procedure yourself.
This video only applies to our injector pressure tester. Kent will show you how to attach the capture bottle and fittings to your older Version 1 or Version 2 pressure tester. Video is free with purchase of the conversion kit.
We know that many of you own multiple Mercedes, including both gas and diesel models. If you own one of Kent’s fuel injector pressure testers you no doubt will want to test all your applicable mechanical fuel injectors in both types of older engines.
In this 13-minute CIS training video, Kent will walk you through the steps recommended by Mercedes Benz to fully test the operation of the EHA valve on 1984 to 1993 4, 6, and 8-cylinder engines with KE-jetronic fuel injection.
In this 26 minute instructional video Kent will show you how to hook up a CIS fuel pressure tester to your older K-jectronic gas engine.
This high-quality meter can test all types of automotive electrical circuits, but Kent has discovered it is particularly well suited for testing Bosch KE jetronic fuel injection components on those CIS models from 1984 to 1993.
In this 11-minute instructional video, Kent will take all the parts included in his fuel system pressure tester builder's kit and show you how to put it all together using the tool and fittings supplied in the kit. This easy DIY job can be done in approximately 15 to 20 minutes.
PLEASE NOTE: Wire color may be all red or all black (depending on stock on hand) .
This WUR is very simple in design and has no internal diaphrams. It is also quite short compared to the other types. No instructions are included, but they are readily available on the internet by doing some google searches.
IF YOU ORDER THIS IN ERROR, IT IS NOT RETURNABLE. Watch the video below to determine which WUR you have BEFORE ordering. This ONLY works on single vacuum units!!! You will find the quality of this kit is impressive and it has things in it that other kits do not have.
PLEASE LOOK AT YOUR SYSTEM BEFORE ORDERING to confirm the type of accumulator you have. ( Watch the last video below for examples )For systems with ONE HOLE ACCUMULATOR only. Some 450SL, 450SLC, 450SE, 450SEL with 4.5 and W116 280SE .
This deluxe kit includes three products related to the rear-end fuel delivery system for the models mentioned. That is the fuel pump, the fuel filter, and the fuel accumulator.
DOES NOT INCLUDE ANY METAL FACTORY HARD LINES!!! What you SEE in the picture is exactly what you will receive. Many of these particular big V8 models are now becoming true collector cars and going up in value at a steady rate.
This is our most complete FID kit yet. Kent wanted to make sure you would have all the parts you need including hardware.
Doing a compression test is one of the best ways to determine the internal health of your gas engine. This is a primary test for doing a physical examination. You want to do this on any old Benz before spending a lot of money to get the engine running right or before restoring your car.
The leads are black and red and three feet in length. The alligator clips can be removed to give you other options on how you use them.
This video will walk you step-by-step through the proper procedures for doing a full compression test on your older V8 Mercedes Engine.