NOTE: Depending on how your sender is grounded, do one of the following: We offer a very commonly used Stewart Warner fuel level sender, which features an adjustable float to work with a variety of applications: part number 665385B. If you plan to replace your fuel gauge or sender, it is important to know the resistance of both your sender and gauge to determine they will work together. Our tanks are set up for the standard SAE 5-hole bolt pattern used by all of the aftermarket gauge manufacturers. Speedway Motors employee Tim M. Decided to take us along as he revives his 241 "Baby Hemi". Be the first to get new products, special deals & promotions! Problem is I don't know what this range is for a 1968 Coronet. One of the most important parts of your racing operation is the engine. If it swings to the left, it is a left-swing sender. In this installment, Tim helps his project breathe a bit better with and Edmunds 2x2 intake, topped with a pair of Speedway Motors' own "9 Super 7" carbs. For most, an electric fuel pump can be a choice of form over function, but for others, it may be the best option. Step 6. To get the right gauge and/or sender, measure the resistance of your existing sender. As the fuel arm moves from the empty to the full position a contact is moved across the board on the rheostat which varies the resistance seen by the fuel gauge. Ford models (prior to 1989) and most Chrysler models. You do not have to worry about polarity for this test. Two of the holes are farther apart than the other holes. The front of the rheostat shows which side the float should stick out from. Your fuel gauge is simply reading a resistance to ground. For instance the resistance of the stock gauge in a 55 Chevy has a value of zero ohms when empty and 30 ohms when full. Click here for a comprehensive article on what to expect! I did some research and found one site that says 10-80 and another says 10-100. Among the changes Jeff made was to install a K&N Performance Air Intake kit. What’s the difference between a fuel tank and a fuel cell? To measure the resistance, disconnect the plug at the sender and use the digital multi-meter set to Ohms. I've removed the wire from the sending unit and grounded it and the gauge went up to 1/2. Depending on how your sender is grounded, do one of the following: If the sender is grounded through the fuel tank - connect one lead of the multimeter to the sender wire and the other lead to the body of the sender. If you cannot make your gauge read anything but full then depending on your ohm range you may have one of the following problems: If you have a 0-30, 0-90 or 10-180 Ohm sender then the sender may not have a proper ground or there is a break in the sender lead wire. I'm still trying to diagnose the problem with my fuel gauge or sending unit. Check your service manual to obtain the resistance range on your particular unit. Once you tear it down you'll see it. There's a right and wrong way to run a two-barrel carburetor on your vintage engine. The process on how to effectively winterize your fuel system in open wheel racing. Learn the cost differences between a reusable and disposable air filter for your car with our guide. Those two numbers will tell you the ohm range is of your sender. This includes step by step instructions and recommended parts to use for your fuel system. Each Fuel Level Sending Unit is designed with a specific resistive input range. Yes. Hook the ohmmeter leads to the sending unit positive and negative wires. If you have a 240-33 or 73-10 Ohm sender then most likely your sender lead wire is grounding out somewhere. There should be full continuity between the metal strip between the rheostat and the bracket and the bracket and the flange. Take his 2015 Mazda6, for example. Would anyone know the correct aftermarket fuel gauge that would work in a 98 TJ, it has a 4cyl if it matters. Refer to the chart below to select the right gauge and sender. Because your gauge is simply reading the amount of resistance to ground this sender will work regardless of the voltage of your car. Two of these screws are farther apart than the other three. Can I use gauges and sending units from different manufacturers? Fuel senders have a rheostat that provides a resistance to ground. Works with many popular models. The first step would be to make sure that you have the proper ohm range fuel sender to match your gauges. Check out this video from our friends at Auto Meter to get up to speed on nearly everything there is know about fuel level gauges. The process of changing out a mechanical fuel pump in a 1957 Bel Air and some helpful tips while doing so. If the float arm is installed on the other side the gauge will read backwards. Or possibly the center terminal on the sending unit itself is grounding out against the body of the car. Or possibly the center terminal on the sending unit itself is grounding out against the body of the car. Learn how to clean a reusable car air filter as well. Jeff K. doesn't just limit his tendencies to the classics. Everything you need for anything you drive. Set your ohmmeter to the appropriate range to read the lowest and highest resistance on the sending unit. 192 Posts . A first-time installation can use either one, just drill the mounting holes accordingly. Lift the fuel-sending unit off the tank and out of the vehicle. A fuel sender can be bench tested with a multimeter. I put my meter on the the sending unit and the reading is jumping all around. If for some reason you have disassembled your sender and now can't get it to read check the following: FUEL LINES, FILTERS, REGULATORS & FITTINGS, FEEDING A CARBURETED ENGINE WITH AN EFI FUEL PUMP, UNIVERSAL FUEL SENDER QUESTIONS AND TROUBLESHOOTING, Dakota Digital - Programmable to work with most Ohm range senders. If the float swings to the right, it is a right-swing sender . Your browser either does not have JavaScript enabled or does not appear to support enough features of JavaScript to be used well on this site. If that post is grounding out you will only see zero ohms on a gauge or multimeter. If you are holding the sender with those two holes closest to your body, the hole directly across is known as the index hole. In this article, you will learn the advantages of using an electric fuel pump and how to install it in your car. If you have a 240-33 or 73-10 Ohm sender then the sender may not have a proper ground or there is a break in the sender lead wire. My fuel gauge only reads full. If the sender is not grounded through the fuel tank - connect one lead of the meter to the sender wire and the other lead to the ground wire of the sender. Record your readings with the fuel sender in the empty position and in the full position. 2.) Check out this guide about how to select the correct carburetor for your Flathead or vintage engine. The resistance of your fuel sender should match that of your gauge.
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