How can you tell if you have a bad mass air flow sensor?
Symptoms of a Faulty Mass Air Flow Sensor The engine is very hard to start or turn over. The engine stalls shortly after starting. The engine hesitates or drags while under load or idle. Hesitation and jerking during acceleration.
Why is the spark plug on my Lexus misfiring?
If there are only misfire codes stored in the vehicle’s computer, the issue is probably related to something the computer doesn’t have sensors to check. A leaky valve cover gasket, for example, can flood the spark plug cylinders with oil intermittently, causing misfires.
Why is my Lexus IS 350 not working?
The IS 350 uses both port and direct injection, so it doesn’t suffer from carbon buildup as much. A rough idle may indicate a carbon buildup problem. To test this, you’ll need a bit of space to get up to speed: Drive the car up to at least 3rd gear. Without slamming on the brakes, depress the pedal hard enough to come to a quick stop.
Why does my Lexus have a compression problem?
If the cylinder reads 5% or lower than the others, there’s a compression problem. Common causes of compression problems include damaged valve seats, cracks or gouges in the cylinder wall, and damaged piston rings. Figure 4. A damaged cylinder.
What does a check engine light on a Lexus mean?
If the Lexus has been misfiring for long enough, it will have probably thrown a check engine light. The light means the Lexus has a diagnostic trouble code stored on its ECU. An easy way to retrieve those codes is by using an OBD-II scanner.
If there are only misfire codes stored in the vehicle’s computer, the issue is probably related to something the computer doesn’t have sensors to check. A leaky valve cover gasket, for example, can flood the spark plug cylinders with oil intermittently, causing misfires.
The IS 350 uses both port and direct injection, so it doesn’t suffer from carbon buildup as much. A rough idle may indicate a carbon buildup problem. To test this, you’ll need a bit of space to get up to speed: Drive the car up to at least 3rd gear. Without slamming on the brakes, depress the pedal hard enough to come to a quick stop.
If the cylinder reads 5% or lower than the others, there’s a compression problem. Common causes of compression problems include damaged valve seats, cracks or gouges in the cylinder wall, and damaged piston rings. Figure 4. A damaged cylinder.
Why is the intake valve on my Lexus not working?
Misfires on the Lexus are most commonly caused by carbon build up on the intake valves that has flaked off and becomes stuck between the valve and the seat, causing a loss of compression.