Category Archives: Fuel System and Fuel System Electrical

Includes information about stock CIS, CIS-E and Digifant fuel systems including troubleshooting, wiring, and diagrams

CIS-E Wiring and Hall Sender, Fuel System and Fuel System Electrical

CIS-E Wiring and Hall Sender

April 21, 2008 Timbo

This quick technote details the CIS-E wiring harness, as found in a 1987 VW Scirocco. This should be similar for any 1.8L 16v.

This picture shows the whole harness with everything labeled.

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Setting Air/Fuel Ratios, Fuel System and Fuel System Electrical

Setting Air/Fuel ratios

October 2, 2007 Timbo

This is the proper way to adjust for a proper burn. Make more power, get better gas milage. Keep your engine alive!

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Fuel System and Fuel System Electrical, Megasquirt

Oxygen Sensor Tech

October 1, 2007 Timbo

Oxygen sensors help the computer make corrections in the car’s air/fuel ratio by measuring the oxygen content in the exhaust. Oxygen in the exhaust is a good measure of the efficiency of the combustion.

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Fuel System and Fuel System Electrical

Cleaning the CIS Airflow Sensor

September 22, 2007 Timbo

This tech procedure is about cleaning the CIS airflow sensor for better running, and fewer starting and idle gremlins…

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ATS Technotes + Timbo's Technotes. An archive of tech procedures for fixing early watercooled VWs from 1975-1992 with a focus on the VW Scirocco Mk1 and Mk2.