Jeep Wrangler: STARTING THE ENGINE — GASOLINE ENGINE (IF EQUIPPED) / After Starting

If Engine Fails To Start

If the engine fails to start after you have followed the “Normal Starting” or “Extreme Cold Weather” procedure, it may be flooded. Push the accelerator pedal all the way to the floor and hold it there...

STARTING THE ENGINE — DIESEL ENGINE (IF EQUIPPED)

Before starting your vehicle, adjust your seat, both inside and outside mirrors, and fasten your seat belts. The starter is allowed to crank for up to 30-second intervals...

Other information:

Jeep Wrangler 2018-2026 Owners Manual: Biodiesel Fuel Requirements

A maximum blend of 5% biodiesel meeting ASTM specification D975 is recommended for use with your diesel engine. If frequent operation with Biodiesel blends that are between 6% and 20% (B6–B20) is desired, the maintenance schedule is subject to shorter intervals...

Jeep Wrangler 2018-2026 Owners Manual: Coolant Checks

Check the engine, battery (if equipped), intercooler (if equipped), and Motor Generator Unit (MGU) (if equipped) coolant (antifreeze) protection every 12 months (before the onset of freezing weather, where applicable). If the engine, battery (if equipped), intercooler (if equipped), and MGU (if equipped) coolant is dirty or rusty in appearance, the system should be drained, flushed and refilled with fresh OAT coolant (conforming to MS...