Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Ignition, BioPower
Different ignition timings are required with ethanol mixture due to the different properties of ethanol as fuel. For this reason, a further matrix has been added for ignition timing with E85 operation.
With an adapted ethanol content of 0-5% the table for petrol operation is used, while at 80-85% the new table for E85 is used. With an ethanol content between 5-80% the torque varies steplessly between the two tables.
The high octane rating in ethanol enables the additional use of slightly advanced ignition in many operational cases. This results in an improved combustion efficiency and lower exhaust temperature. The increased combustion efficiency means that the increase in fuel consumption is not so high with high ethanol content. The lower exhaust temperature means that fuel enrichment is not required at high engine speeds.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.