I have a 2012 Nissan Rouge Special with 151451 miles on it. It's throwing codes P0300 and P0303. I changed the ignition coils as a set along with the spark plugs. One oxygen sensor was bad, and I changed that also. However, I'm still getting the bad shuttering during acceleration. I'm thinking of changing the injectors, but I want to be sure.
I'm about to just junk the vehicle because I don't want to keep throwing parts at it only to get the same codes pop back up.
How old are your air and fuel filters? Is fuel pressure OK? Have you tried cleaning the MAF sensor and throttle body, and cleaning the injectors? Also, live data may shed some light on what's going on. Diagnosis is preferable to loading the parts cannon.
The air filter is still relatively clean on a visual inspection. The mass air flow sensor has been cleaned and tested, it gave the numbers it was supposed to. I took off the throttle body and cleaned it with the throttle body cleaning spray. I just noticed a slight improvement with the gas mileage but the problem isn't gone.
I forgot to update everyone on this issue. The vehicle did have tuning issues, but the shuttering was coming from the inner half shafts. They nearly fell apart when I pulled them out to replace them. The ride is smooth and quiet now. {black}:cool:
Do a dry and wet compression test on cylinder number 3. Then do the same test for the rest of the cylinders. Odds are- your motor is on its last legs.
Read the names of your cars, people.. It’s pasted on the rear of almost ALL vehicles!
I'm about to just junk the vehicle
Diagnose first. Don’t junk first. See here -
https://carkiller.com/scottykilmer/qa/misfire-4/
I changed the ignition coils as a set
Did you use the OEM ignition coils or Chinese junk?
I ordered them off of eBay 4x Ignition Coils for Nissan Altima Sentra Rogue Cube 2.5L Infiniti FX50 UF549. One of the old ones on the third cylinder was bad, it had gray ash on the boot and the spark plug was fouled that's the reason I ended up changing them all. They probably are "Chinacom" coils.
Using Chinese ignition coils are always a gamble. Was the P0300 code present before you changed all the coils?