Fuel And Ignition In Automobiles Question Plz Need Answer Quick
Posted in Crank, Oil and Piston | Asked on Sep 11, 2010
Below is the question about Fuel And Ignition In Automobiles Question Plz Need Answer Quick, If an Automotive technician diagnoses a car coming in, And there is nothing wrong with the car but it throws 2 knock sensor codes, he replaces the knock sensors and the customer came back the next day and it threw 2 knock sensor codes again, signs of being sluggish.. the question is “What did the technition do wrong?”
No but the question says it was diagnosed correctly.. I already asked my instructor if it was misdiagnosed
any guesses would be nice its not for real not for real its just for homework
There are 4 Answers for "Fuel And Ignition In Automobiles Question Plz Need Answer Quick"
Misdiagnosed.
You can get knock sensor codes and have something else wrong throwing the codes.
This is like having AutoZone scan a car and tell you what to buy.
Misdiagnosed!
Sounds like there,s something else making the knock sensor code keep coming up. something that,s not throwing a code but still can be bad. ask him about that because there are things that can go bad and not throw a code.
He went with the most common cause. unfortunately, the ‘weakest link’ in the modern engine is the sensors that regulate it.
the easiest ‘quick fix’ nowadays is to replace the offending sensor
its a gamble. Spend $30 on a new sensor and an hour to install it, or spend hundreds to actually locate the problem and repair. Replacing the sensors could be the first step in the diagnosis process, and probably the cheapest step (and often the correct step in repair)
I could be the car is knocking just you cant hear it check for excess carbon excess carbon will raise the combustion ratio causing pinging. then you need either a computer flash or a top engine clean. could also be bad gas
also timing chain or belt could be wore out causing the timing to vary
a bad engine mount could set the cde
misfires,worn engine parts even a bad ground or pcm
the technician doesn’t realize that a knock code seldom is a bad knock sensor.the code says either there is a knock or there is no signal so he misdiagnosed
he just threw a part at it and called it a day
i have delt with hundreds of knock codes and only twice was it a knock sensor