Md Amir

You can check a bad alternator by measuring voltage at the battery terminals while the engine runs; a reading below 13.5 volts confirms a charging failure.

Connect a fuel pressure gauge to the test port, turn the key on to prime the pump, and compare the PSI reading against your vehicle’s factory specifications.

To check fuel pressure, attach a mechanical gauge to the fuel rail test port, prime the pump by turning the ignition key, and compare the PSI reading to the

You can check fuel injectors by listening for rhythmic clicking with a stethoscope, measuring resistance with a multimeter, or using a noid light kit.

You can check car Freon levels by connecting an AC pressure gauge to the low-pressure service port while the engine runs and the air conditioner is set to

To check engine oil, pull the dipstick from a warm engine, wipe it clean, reinsert it fully, and remove it again to read the level between markers.

To check engine coolant, park on level ground, let the engine cool fully, then verify the fluid level sits between the “MIN” and “MAX” lines on the translucent

Locate the translucent plastic reservoir under the hood and verify the fluid sits between the “Min” and “Max” lines while the engine is cold.

To check compression on an engine, remove all spark plugs, disable the fuel and ignition systems, insert the gauge, and crank the engine for five pulses.

To check compression, warm the engine, disable the fuel system, remove all spark plugs, screw in the tester, and crank the engine to read PSI.