Changed spark plugs, boots now multiple codes and misfire - any ideas?
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Joined: Sep 2018
Posts: 17
From: NY
Changed spark plugs, boots now multiple codes and misfire - any ideas?
My 2008 Maxima SL is fully stock.
It has 125k miles and I noticed a rough idle, so I decided to change the spark plugs.
Once changing the spark plugs, I decided to change the coil not boot (and spring) as well. I didn't have any dielectric grease, so I didn't apply any to the boot.
I also changed the lower plenum gasket.
I bought the parts in rockauto, they recommended the NGK LFR5AIX-11 as the OEM replacement, so I got that.
The spark plugs that I took out were actually the DILFR5A11, which is what I later saw that the SM calls for. (Incidentally, Amazon incorrectly claims that the DILFR5A11 does not fit my car.)
when I started my car again, I immediately got a few codes, which I cleared. Two of the codes were p0223 and p1217, I'm not sure what the 3rd was.
I drove the car for a mile (prob made it up to 30 - 40 mph) and all was fine. The next day, I drove it for around 10 miles, to work. After 9 miles or so, I gave gas and it took a second to register, but then it did, and I was shoving at ~50mph, maybe a bit less. A mile later, at a red light, the car started idling very roughly. After I turned, it started jumping very roughly (I'm gonna take an uneducated guess that everything was misfiring) and was just getting worse. The tachometer started swinging way up and down. I barely rolled into a parking spot at work. After work, I cleared whatever codes had come up and tried driving again. The car was real rough and then I started hearing little popping noises from up front, so I pulled over and had the car towed to a shop. The code now was p1217.
When the mechanic got around to work on the car two days later, he couldn't start the car.
They took off the plenum and the attached hoses took out the 6 plugs, put everything back and the car started fine.
He ran it for a bit with no codes, told me he doesn't know why it wasn't working, but it's working now, charged me $265 and sent me on my way.
Before taking it for a 70 mile drive, I figured I'll see if there are any pending codes.
Unfortunately, I got p0113 and p0300.
I brought the car right back into the shop and went and rented a car.
I'm trying to figure out where I went wrong. Any clues?
It has 125k miles and I noticed a rough idle, so I decided to change the spark plugs.
Once changing the spark plugs, I decided to change the coil not boot (and spring) as well. I didn't have any dielectric grease, so I didn't apply any to the boot.
I also changed the lower plenum gasket.
I bought the parts in rockauto, they recommended the NGK LFR5AIX-11 as the OEM replacement, so I got that.
The spark plugs that I took out were actually the DILFR5A11, which is what I later saw that the SM calls for. (Incidentally, Amazon incorrectly claims that the DILFR5A11 does not fit my car.)
when I started my car again, I immediately got a few codes, which I cleared. Two of the codes were p0223 and p1217, I'm not sure what the 3rd was.
I drove the car for a mile (prob made it up to 30 - 40 mph) and all was fine. The next day, I drove it for around 10 miles, to work. After 9 miles or so, I gave gas and it took a second to register, but then it did, and I was shoving at ~50mph, maybe a bit less. A mile later, at a red light, the car started idling very roughly. After I turned, it started jumping very roughly (I'm gonna take an uneducated guess that everything was misfiring) and was just getting worse. The tachometer started swinging way up and down. I barely rolled into a parking spot at work. After work, I cleared whatever codes had come up and tried driving again. The car was real rough and then I started hearing little popping noises from up front, so I pulled over and had the car towed to a shop. The code now was p1217.
When the mechanic got around to work on the car two days later, he couldn't start the car.
They took off the plenum and the attached hoses took out the 6 plugs, put everything back and the car started fine.
He ran it for a bit with no codes, told me he doesn't know why it wasn't working, but it's working now, charged me $265 and sent me on my way.
Before taking it for a 70 mile drive, I figured I'll see if there are any pending codes.
Unfortunately, I got p0113 and p0300.
I brought the car right back into the shop and went and rented a car.
I'm trying to figure out where I went wrong. Any clues?
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