KISS Diagnostics Fuel Delivery & Fuel Trim Pack: 27 Diagnostic Cheat Sheets (HTML + Printer-Friendly PDF)

Lean, rich, low pressure, dead injector: fuel codes can come from the fuel side, the air side or the wiring. 27 cheat sheets covering fuel trim, rail pressure, injector circuits and the fuel pump, built to show you the next test instead of the next part. Written by a licensed technician with 20 plus years in the bay.

WHAT'S INSIDE (27 sheets)

• Fuel pressure too low, too high and regulator performance: P0087, P0088, P0089

• Fuel system large and small leak: P0093, P0094

• Fuel trim, lean and rich, Bank 1 and Bank 2: P0170, P0171, P0172, P0173, P0174, P0175

• Flex fuel composition sensor circuit: P0176

• Fuel rail pressure sensor A circuit and range / performance: P0190, P0191

• Injector circuits, cylinders 1 through 8: P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208

• Fuel pump primary circuit: P0230

• Cylinder 1 contribution / balance fault: P0263

• Fuel level sensor circuit high input: P0463

• O2 sensor signal stuck rich and stuck lean, downstream: P2271, P2272

ALSO COVERED IN DIESEL: a separate P0087 sheet for diesel high-pressure common rail. For the sensor circuit, response and heater codes behind P2271 and P2272, see the O2 Sensors pack.

ON EVERY SHEET: step-by-step diagnostic flowchart · most common causes ranked by estimated likelihood · professional tips · reference table of normal vs failed readings · related codes · safety warnings. 10 of the 27 sheets also include a waveform reference showing a normal and a faulty signal pattern.

HOW YOU GET IT: one zip, instant download after payment. Every sheet comes in two formats: HTML (any browser, phone, tablet or computer) and a printer-friendly PDF. Generic SAE codes that apply across makes. Prices in USD. Digital product, all sales final (see FAQ).