Finding the Correct Fuel Injector Connector Type for Your Ride
Maintain the high efficiency rating of your engine by keeping an eye on its fuel delivery system. When power loss and roughness are noticed, check the fuel injector connectors for warping, loose fit, and cracks. These problems are indications that the electronic pulses from your engine computer may no longer be getting through correctly to the injector, hence the poor performance of the engine. Replace your connectors with the correct type immediately to restore your vehicle's efficiency.
Fuel injector connector types:
D-jetronic. Choose this type of connector if you have hose-end injectors from Bosch and Bendix. The D-jetronic features seamless fit to these injectors, thereby ensuring strong contact with the engine computer.
EV-1 minitimer square. All Bosch injectors produced on or before the 90's are compatible with an EV-1 minitimer square connector. It is also used with some of Denso and JECS injectors. Unlike the D-jetronic connector, this type has tabs centered inside and outside its perimeter.
Square type/offset tab. This fuel injector connector is compatible with JECS and Denso injectors that don't require center tab inside the connector perimeter. Get this connector to ensure your injector seats perfectly for better electrical contact.
EV-6 USCAR. If you have a newer Bosch injector, 90's and up, the EV-6 USCAR should be your choice. This injector connector offers distinct soft-edge square design with equally distinct 2-prong construction.
Delphi multec2. This is an OE connector for slim-bodied Delphi injectors. You should only get this type of connector if you are equipped with this brand of injector.
Keihin. This is the type of fuel injector connector that has not been seen on any brand of fuel injector, but can be used as replacement if it perfectly fits your factory injector. This one is rectangular with tabs on both sides and bottom.
Japanese oval (yellow). Get this injector connector if you have newer models of Denso and JECS injectors. Also, make sure that your injector requires connector side tabs nearer the bottom.
Japanese oval (red). This is your pick if you have newer models of JECS and Denso injectors that require side tabs nearer the top.
Japanese oval (metallic). This fuel injector connector is distinct from the other two Japanese ovals not only in shade but also in construction. This one has rounded corners, tabs at both sides but in different heights, and two tabs at the bottom. This is your perfect choice if you have a JECS side-feed injector.
Step-by-Step Installation of a Fuel Injector Connector
Erratic idling and rough running of your engine are typical symptoms of weak electronic pulses in your fuel injector, which is commonly caused by worn connectors. These are male plugs that link your injector to the electrical harness of your engine computer. Cracks on their surfaces and loose fitting will confirm that you need to replace these connectors immediately. Installation of new fuel injector connectors will be a serious task, but you can do it on your own with the help of this step-by-step instruction:
Difficulty level: Difficult:
Things you'll need:
- Cutter or crimping tool
- Screw driver
- Blower or heat shrink
- Allow your engine to cool before fiddling with your fuel injector/connector.
- Turn your engine off, and disconnect your negative battery cable from its terminal to avoid electrocution.
For replacement of the connector only:
Step 1: Pry the wire clip that secures the connector to the pigtail. It won't come right off, but will simply loosen up. Discard the connector.
Step 2: Insert the water seal of the new connector to the factory wire, and then the connector. Once the connector is properly crimped to the wire, push the seal towards the connector flush.
Step 3: Plug the newly installed connector into the injector.For replacement of the connector-wire (pigtail) assembly:
Step 1: Unplug the connector from the fuel injector.
Step 2: Clean the area where the old connector was to keep your new connector from getting exposed to unwanted elements.
Step 3: Measure the length of the pigtail that comes with your new fuel injector connector, and cut your old wire near where the pigtail ends.
Step 4: Connect your pigtail to your old wire and heat shrink all connections.
Step 5: Install your new connector-wire assembly to the fuel injector. Make sure it is properly connected for best result. Heat shrink all ends of the wires .