I have a 2011 Mazda Cx-9 Grand Touring (3.7L V6) with 120000 miles on the odometer.
It had a misfire with a check engine light. I took it to the mechanic, he scanned it and told me that the fuel injector on the cylinder 5 was bad. He changed the spark plugs, along with the defective injector, and he cleaned the remaining injectors.
Now that he finished the repair, the misfire has gone, but I noticed that when I put it in reverse and only in reverse, it still misfires intermittently, with a strange grinding “grrrr” noise.
I would really appreciate your opinion on my issue.
Thanks.
Do you know where the nosie comes from? When do you hear the noise? At stop or when the car is moving?
The noise comes from the engine when reversing (if I press the gaz), and it misfired twice (the car jerks when I give it gas on reverse)
Clean the throttle body and MAF sensor. Do you also have access to live data?
Nope I don’t.
I just witnessed these symptoms and was confused because like why it would only misfire on reverse?
I am actually considering taking it to my local mechanic, but I wanted to see what’s your opinion on this topic.
Thanks for your advice, I really appreciate it!