Fuel Injector Insights

Some key facts about Ski-Doo E-TEC injector O-rings and gasoline. Gasoline Freezing Point: While it begins to thicken or turn gel-like around -40°F, it requires severe, arctic-level cold (or lower) to freeze solid. Choosing between Nitrile, Viton, and Fluorosilicone O-rings typically depends on the operating temperature and the specific chemicals or fluids the seal will […]

While not a comprehensive guide, it highlights several common and relatively easy-to-verify items to help troubleshoot a Ski-Doo lean condition. It is compiled from customer feedback  as to things discovered over time or things they are suspicious of. Ski-Doo engines typically do not fail due to lubrication-related issues. On E-TEC engines, failures are almost always […]

To accurately read a new spark plug for engine condition, you need to run the engine long enough for the plug to show current operating behavior—not old residue from used plugs. While not a comprehensive guide, this article highlights the basics and provides a solid starting point. There are many spark plug readings that fall […]

When using n-Heptane as as example for a calibration fluid for fuel injector testing, temperature has a measurable and repeatable effect on flow; often more pronounced and predictable than pump gasoline because n-heptane is a single-component hydrocarbon with very stable properties. Viscor C-140 we use for GDI and Piezo injectors will be similar. Below is […]

Can You Clean Fuel Injectors in an Ultrasonic Cleaner?Yes—but with important caveats. Not all fuel injectors are the same, and not every ultrasonic cleaner is the same or appropriate for fuel injector service. The effectiveness of ultrasonic fuel injector cleaning depends not only on the process itself, but on using the proper equipment to execute […]

Ensure proper installation of E-TEC Injectors with our detailed torque guide. From initial low settings to final specification, learn the exact stage-by-stage sequence. When in doubt refer to your specific engines manual. Tighten injector screws in stages, starting with the lower screw. First torque is 4.5 ft. lbs. (6 N·m). Second torque is 9 ft. […]

Let’s drive into the world of vintage Bosch fuel injection systems and understand what are CIS Injectors. Let’s break it down: Overview Bosch developed several major types of early electronic and mechanical fuel injection systems from the 1960s–1980s. The three you mentioned — CIS, K-Jetronic, and L-Jetronic — are related but quite different in how […]

How to de-pin E-TEC injector coils E-TEC coils which are pinned into the E-TEC injector plugs can be de-pinned quite easily. The  plugs are TE Connectivity Super Seal plugs and are weather proof. Step 1: Remove the anti-backout plate. While there is a specialized tool for this, a regular hooked pick or an eyeglass screwdriver […]

The message “BE ADVISED OFFSHORE INJECTORS ARE BAD” serves as a warning against using inexpensive, unregulated fuel injectors from foreign manufacturers, known as “offshore injectors”. The warning is widely shared in mechanical communities, as these parts are prone to failure and can cause major engine damage, wasted time, and poor performance.  Offshore non-OEM injectors are […]

  It’s important to understand that the coefficient file required by the Evinrude EMM is unique to each injector. When replacing an E-TEC injector, you must update the EMM with that new or used injector’s specific coefficients. You can retrieve the coefficients by scanning the QR code on the injector tag; however, those values represent […]

Yes, ethanol can damage port fuel injectors, but the extent depends largely on the injector’s construction and materials. Older or non-ethanol-compatible injectors often use rubber seals, plastic components, or certain metals that can degrade when exposed to ethanol over time. Ethanol’s solvent properties can cause these seals to swell, crack, or shrink, potentially leading to […]

On gasoline engines, a Megohmmeter is only used on Piezoelectric injectors. If you use one on a regular coil based Direct injector or a port injector you will likely damage them. Can a megohmmeter check fail but still pass using a multimeter OHM check? – Yes! A megohmmeter (Megger) may indicate a failure while a […]