2010MaximaSV

I have a 2003 Maxima SE 6 speed that I picked up recently. The codes that I got are P0300 P1448 and P0455. I did check the fuel cap and it looks to be new so it couldnt be that. The car has 128,000 miles and the owner said the spark plugs have never been changed. I checked all the hoses and did not see any leaks or anything. Today I was driving the car and anything under 2000rpm's the car would start shaking no matter what gear it was in. Should I start with the spark plugs? Then after that?

joeltender

Change your plugs asap! avoid driving or you'll eff up your cats, injectors, etc.
Unfortunately, you'll need to replace your valve covers with 04 ones (gaskets too) test your coils-goodbye po300.

The others are evap/gas cap codes. Tons of us have these codes and just live with them-unless your super picky or live in cali. I've had those 2 codes for over 30000k and get great mileage and breeze through emissions. after your done, seafoaming is probably a good call.

2010MaximaSV

Yes I wont be using the car so I will be replacing the spark plugs tomorrow. My coils would be gone now??? Is there a part number for the valve covers?

2010MaximaSV

I just changed all my spark plugs and tested the front 3 coils. It still does the same thing feel like it even got even worse now.

CMax03

iTrader: (3)

Put a timimg light on those (6)coils to see if they're missing!

2010MaximaSV

How do I do that, would like a autozone or pepboys have that?

CMax03

iTrader: (3)

Sears, autozone, Advance, etc.....connect the inductive pick up around the coil harness and it will pickup the ignition signal and flash the strobe

00Lightsout

the VQ30DEK had all faulty coilpacks from NISSAN...did the VQ35 have the same problem?