Remove the relay and retest the circuit. From there the self learning ecu keeps the airfuel in trim.
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Fitech o2 sensor problems. Fitech fuel injection has been supplying automotive products specifically fuel injection products since 2012. We are leading providers of fuel systems and ultra ram sbc efi. Our folks have several options from basic to completely trick. Fitech idle afr fluctuation problem duration. When the mixture in your car oxygen and fuel is too lean or too rich the engine becomes less efficient. 5 symptoms of a bad oxygen sensor and o2 sensor is failing duration.
We reach almost all horsepower endeavors. End users can tweak the tune through this hand held controller in the pro tuning option. If the light comes on again locate the short to voltage in the wiring harness with the relay removed. This is a forum where users share their knowledge and information about maintaining and tuning the ready to run fitech fuel injection kits to squeeze the best performance and economy out of their engines. Fitech currently uses a bosch lsu 42 oxygen sensor also referred to as an o2 sensor. Top 5 auto repairs 25692 views.
O2 oxygen sensor. If you have noticed that your vehicle is running irregularly or that the engine sounds rough there might be a problem with your oxygen sensor. Usually the heater circuit in this case is controlled by a relay. Fitech efi tuning forum electronic fuel injection tuning for automotive applications. If the o 2 sensor heater circuits negative wire goes directly to ground look for a short to power problem. Upstream is located before the catalytic converter.
Fitech recommends using a replacement sensor from a 2001 2004 vw beetle upstream o2 sensor. Fitech offers these oxygen sensor bungs that allow the use of wide band o2 sensors but dont require welding.
Gallery of Fitech O2 Sensor Problems
