This is the digital EFIE for 4 cylinder engines, or any engine that has one oxygen sensor upstream of the catalytic converter and one downstream sensor. Usually, 6 and 8 cylinder engines have 2 of each, but if we recommended this model to you for your larger engine, it's because yours is one that has this configuration.
We recommend a Digital EFIE for any car with narrow band oxygen sensors, which is about 90% of all vehicles. Virtually all American cars, all foreign cars older than 1997, and most foreign cars after 1997. Japanese cars after about 2000, should be suspected of having wide band sensors. If you are not sure what type of EFIE your car needs, then see this article: Which EFIE Do I Need?
The Dual Digital EFIE Basic is the newest member of our Digital family of EFIEs. Digital EFIEs allow much leaner settings on vehicles than other types of EFIE. However, digital EFIEs should only be used on sensors that are upstream from the catalytic converter. This model has one digital EFIE and one analog EFIE. The analog EFIE should be used for your downstream sensor.
For more information, see the article The New Digital EFIE: How It Works. Also see the Digital EFIE Installation Instructions.
Digital EFIEs have the following benefits:
- Can make the air/fuel mix much leaner than earlier designs. With many cars you can lug down your engine, and even kill it if you set it too lean. Note: Some cars have preset fuel minimums that will not allow this to occur
- Absolutely rock steady adjustment no matter what temperature the environment. Will vary less than 1/2 of 1% over it's rated temperature range of -40 to 125 Centigrade.
- Will work with older, "tired" oxygen sensors that should have been replaced. Other EFIE styles require these to be replaced. Mind you, if they are old, they should still be replaced because you will not get optimum fuel mileage with old sensors. But if they are working prior to your EFIE install, they will still work with this EFIE.
- One adjustment pot modifies the upstream (Digital) EFIE, and one pot adjusts the downstream (Analog) EFIE.
Note: Some Dodge/Chrysler vehicles have been known to put 2.5 volts on the sensor's "sig low" wire. This raises the signal high wire by 2.5 volts. Our device works with these sensors too.
This product was added to our catalog on Tuesday 31 August, 2010.