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If your fuel level gauge is not reading accurately or the needle jumps around and or your car’s low fuel warning light does not comes on, it is usually a problem with the tubular sending unit in the fuel tank.
This is a common occurrence as these gas engines with Bosch C.I.S. fuel injection age. Most of them are now at least 20 + years old. The problem goes something like this. You start the engine cold and it will hardly run. It runs rough and idles very low and will even quit a few times.
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.
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?
FITS all 116 123 Diesel and Gasoline, and 126 chassis from 1977 to 1985. Finally a socket to remove your fuel tank screen that really works. Most correct size sockets tend to be SO BIG that they require 3/4 inch drive ratchets and extensions to use them. Who has those in their tool box??
Kent shares with you 3 key steps that you should consider doing to get your old fuel injected 6 and 8 cylinder engines running properly. These include:
Excellent quality zinc plated hose clamps as shown. These can be tighten with a straight blade screw driver or a 7mm socket or nut driver.
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.
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.
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.
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.
This video will help you decide if you want to try to do a fuel pressure test yourself. It is a fairly simple DIY job but will all the confusion and misinformation on the internet; one would believe it is a complicated process that is hard to understand.
Let's face it. These fuel tanks and now 50 years old and most are not squeaky clean inside. There is a fuel tank screen that will catch most particles if the screen is in good shape. But I have found that it will not catch the very fine rust particulates that are so common in these old cars.
PLEASE NOTE: Wire color may be all red or all black (depending on stock on hand) Performing some fuel pressure tests on your K-jet or KE-jet engine
If you own or are restoring a CIS fuel-injected Mercedes, a pressure tester is a must-have! This complete kit is not available, but now you can build your own. SEE related products below to purchase.
People call these two units pressure regulators, but really only one of them is. In this xx minute video, Kent will explain how these are different, what each one does, how to adjust them, and how to test them with a hand pump vacuum tester.
In this 8-minute video, Kent will show you how to quickly depressurize your D-Jetronic fuel system before doing any injector service, replacing any hoses, or hooking up our fuel pressure tester.
In this xx minute instructional video Kent will walk you through the process of hooking up the gauge, taking the proper readings at idle and at rpm, adjusting the regulator, checking for internal leaks, and depressurizing before removal.
6/6/23 Update: Now with a liquid filled pressure gauge installed to increase accuracy and reliability. We customize, test and recalibrate this fuel pressure tester before we ship it.
This kit will put a smile on your face, especially if you have done it before the "old way." Watch the video below for full instructions on how to use this kit to do the fastest fuel system depressurization in the world!
WARNING: MAKE CERTAIN your current injectors are blue/green at the top. A restocking fee will apply if you place an order in error. These are for the 4.5 engine only. See related products below for the 3.5. A video is worth a few thousand words.
We have been able to determine that most of the 500 series R107 and W126 of the early to mid 1980s have the same FID setup as the 380 engines.
This can do amazing things for your new fuel hose installaton on your old Benz engine. Watch the video to learn more. Sold individually in approximately 6 inch lengths.
Set of 8 correct size bolts and washers to spruce up the engine compartment of your D-jetronic V8 engine. Watch the videos to see how these actually look installed.
These engine supply fuel hoses are critical to the well-being of your engine. I have seen too many rotten and deteriorating hoses on these D-Jet engines that could easily lead to an engine fire, and they just do not get replaced when they should.
In this 36-minute instructional video, Kent will walk you through the process of doing a complete fuel hose replacement and fuel injector service on a 1970 to 1975 Mercedes V8 engine with Bosch EFI electronic fuel injection.
If you are removing and replacing your M110 fuel injectors these are the seals you should have on hand. Always replace the rubber seals. I know it is possible to reuse the plastic sleeves but many times they are brittle and will be damaged upon removal.
In this 9 minute instructional video, Kent will explain how to test your fuel accumulator to determine whether or not it has failed internally. A failed accumulator will make your engine hard to start when hot.
This is the most complete 1970 to 1975 V8 injector repair kit you can find anywhere.
In this 24 minute instructional video Kent will explain the process of how to bench clean and test your D-jetronic fuel injectors in your own garage or workshop once they are removed from the engine.
This will give you everything you will need ( except 12-volt power and cleaning fluid ) to bench clean and test your D-jetronic fuel injectors in your own garage or workshop once they are removed from the engine.
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 xx minute video will take you step by step through the process of modifying your warm up regulator so you will be able to easily make adjustments to your cold start control pressure.
With the required pressure tank you will be able to individually test and clean our D-jet fuel injectors. Along with a 12-volt power source, you will need I gallon of cleaning fluid as described in the instructions.
Before you make this modification you should be very familiar with the function of the WUR and how its pressure adjustements affect the performance of the K-Jetronic fuel injection systems. The tools and supplies offered in this kit will allow you to modify your warm up regulator at home and it y
New Mercedes o-ring as shown. Always replace this seal when removeing and cleaning your fuel tank strainer ( screen ).
PLEASE NOTE: Possible shipping delay. This is a special order item and may take up to 7 days before we can ship it!
This 25 minute video will instruct you on how to replace the fuel injectors in your 1976 to 1980 8-cylinder M117 engine safely and efficiently. This is a fairly straightforward job, but there are some pitfalls you will want to avoid.
PLEASE READ BEFORE ORDERING: The plastic injector holders are no longer availabe. The video instructions will show we include them in the kit so PLEASE disregard. You will have to use your old holders and install the new green seals we include.
This 33 minute video will instruct you on how to replace the fuel injectors in your 8-cylinder M116 engine safely and efficiently. This is a fairly straightforward job, but there are some pitfalls you will want to avoid.
This 16-minute video will instruct you on how to replace the fuel injectors in your 6 cylinder M110 safely and efficiently. Since this is a fairly straight forward remove and replace this is not a step-by-step video.
This is every thing you need along with free video instructions by Kent Bergsma. Why change the K-jet fuel injectors in your M110 engine. One thing is they are very old. Second this is right now they are readily available and resonably inexpensive.
Why change K-jet injectors when "they are working?" Why change shocks when they feel ike "they are working." The deteration is very slow over time and you may not notice the difference in how the engine starts, runs, accelerates, and delivers mileage until you do this service!
You would be amazed at how much fuel can leak out of a fuel hose when you disconnect it from your tank or engine. This is an easy way to prevent messy spills.
Fuel hose as shown. Connects to bottom of fuel tank and drops down to fuel damper. Make sure you do not have a 1975 or early 1976 with electronic fuel injection.
This hose assembly was used on the fuel delivery systems in the late 1970s and early 1980s. Installed on some R107 450SL and 450SLC, W116 450SE / L and 280SE, and the W123 280E and 280CE. Be sure to check your car before ordering to make certain this hose is installed.
In this 13-minute video instruction Kent will show you how to make your own accumulator tee hose connection either using parts from. our kit ( see below) or parts you purchase yourself. This video is included free with the purchase of our kit.
This kit will give you everything you need to fix the leaking or aged Tee hose between the fuel damper and the fuel accumulator on most 1977 to 1980 fuel delivery systems. Watch the video below to learn why this is needed.