Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to do a compression test [title] Bring the engine to its normal running temperature. [step] This can be done in the following ways. [substeps] If you haven't driven your car recently then the engine is most likely cold.

Ending1: If you have the engine running at full speed now use the car gauge gauge for your current race. The gauge on the dashboard, as well as the gauge from the gear shifter, displays the temperature. Ending2: Start your vehicle as usual and keep the engine running for a few minutes. This should warm up the engine to its normal operating temperature; however you should be careful not to overheat the engine by keeping it started for too long. Ending3: That means there may be a dead engine, as it has probably been running since the previous day. If you haven't driven it in a while the engine is probably warm and not in tune. Ending4: If you have been using your car for a long time then a moderate warm temperature will suffice as an alternative. If you have a car that is not used for extended periods of time you should not overheat it.

Answer format: ending1/ending2/ending3/ending4