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Why does my V40 dci knock when started from cold and goes when engine is warm?
Wiki User
∙ 15y ago
Diesel engines relies on heat generated by compression to ignite the fuel. When the engine is newly started the air the gets compressed also gets a little cooled by the still-cold engine block, so the ignition is a little delayed and the engine runs rougher. With a warm engine the the compressed air gets a bit warmer, so the engine fires easier and runs smoother.
Wiki User
∙ 15y ago
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What causes cold engine knock on a 1997 Chevrolet Lumina 3.1?
Cold engine knock that goes away after warmup is usually piston slap. Worn pistons worn cylinder bores, wrong oil (too light) on a high mileage engine.
What does a car do when the knock sensor is bad?
The knock sensor retards the engine timing when there is a knock or ping detected. This will make the car a little sluggish. It is rare that the knock sensor goes bad.
Where is the Knock Sensor located on a Chrysler Town and Country?
It is located on the side of the engine block. The purpose of the knock sensor is to retard engine timing When there is an engine noise. It is a rare case that one ever goes bad.
Can you show me a picture of the engine?
I am look for a engine for a infinti qx4 i need to see were a knock sensor goes am trying to fix it
Need info on where your knock sensor goes on your 2004 chevy motor?
We need to know what engine you have to answer that.
Truck engine temp goes from hot to cold?
it should start at cold
Sign of knock sensor going bad?
the only sign is if it goes bad it should trigger the check engine light, you wont notice loss in peformance in engine. all it does is when there is a knock in a cylinder, from bad fuel, it leans back on fuel to stop the knock.
Does a harmonic balancer knock on a 305 Chevy when it goes bad?
YES it can, but the engine would vibrate and shake if it did.
Oil sensor light comes on when first started cold but goes off when engine warms up on 2001 ford expedition?
make sure your oil is up to level.
What Causes 2002 Chevy Trailblazer Engine Knock?
Gm used a short piston skirt on this year. The knock is piston slap that normally goes away when engine warms up. Sounds bad, but should not cause any problems.
If your knock sensor goes out how would your car run?
You would probably hear a spark knock or pinging under acceleration or load. Check engine light may come on also.
What is knock sensor on Honda s2000?
A knock sensor detects engine knock in the motor(aka pinging, detonation, or uncontrolled explosions. it basically means the motor is about to blow up or potentially could.) the second part to a knock sensor is that it keeps the ignition timing as advanced as possible to make the most power without making engine knock. So if you have a bad knock sensor or have a check engine light form a knock sensor your car will be slower. this is when your car goes into LIMP mode which is basically a preset running condition which is safe for the motor.
