Why does a cold start sound loud?
When it is cold, more fuel is added to the air/fuel mixture to make up for the lack of natural vaporisation. So the AFR (air-fuel ratio) is seen by the ECU to be leaner than usual (below the Stoichiometric ratio of 14.7:1) so it compensates for this with extra fuel to make up for the unburned fuel due to the cold.
Why does my car sound so loud when I start it?
So, what is that grinding noise you hear when starting a car? Most likely, if it is true grinding that you hear, the problem is related to the starter. Causes include the starter not lining up correctly with the ring gear on the flywheel, missing or damaged gear teeth, or a faulty solenoid.
Why does my car make a loud sound when I start it?
Sometimes the loud engine sounds you hear aren’t due to the engine having a problem at all. Instead, it could be caused by a damaged or failing muffler. If it just seems like your car is running louder than it used to, but there aren’t other strange sounds, it might be due to a damaged muffler.
Why does my car make a ticking noise when I Turn Off the engine?
GM has issued a service bulletin #10-06-01-007D to address Engine Ticking Noise When Cold on the vehicles listed below. The ticking noise appears when the engine has been off for more than 2-hours. The tick noise may last from two seconds to ten minutes. GM has determined that the noise can be caused by any of the following:
When does the engine tick when the car is cold?
GM has issued a service bulletin #10-06-01-007D to address Engine Ticking Noise When Cold on the vehicles listed below. The ticking noise appears when the engine has been off for more than 2-hours. The tick noise may last from two seconds to ten minutes.
Why does my Honda Accord make a clicking noise when I start it up?
Currently, it has 95,500 miles. I’ve had it since it was brand new ( had 27 miles on the odometer) It’s been serviced at every scheduled interval by the local Honda dealer. Over the past two weeks, I’ve been hearing a clicking-like noise when I start it up in the morning. The noise goes away after the engine warms up.
Why does my car make a clicking noise when I turn the key?
Although a clicking sound can come from other sources such as the suspension, the most frequent and familiar clicking comes after turning the key or pressing the ignition button. There might be a sluggish single click or there might be a jarring spray of clicking, and both are symptoms of parts asking for assistance.