OBDII code Question

[ZZROCOOL]

codes
p1300
p0300
p0301
p0306

started on Thursday morning and it ran ROUGH check engine light blinking then smoothed out after 10 min. I reset the light and it stayed off (although has a slight stumble at speed) then came back on after 24 hours or so about 75 miles. Still runs pretty smooth (or close to normal) but has the slight stumble at speed.

Recently replaced Plugs, air filter, O2 sensors, exhaust manifold gaskets

Thanks in advance!

 

[joey]

What plugs did you put in?

 

[ZZROCOOL]

Joey,

Plugs were placed 2 months ago

Double Platinum - BOSCH from atlantic british

 

[joey]

D1 or D2? If D1... I wouldn't even consider the Bosch Platinums, D2... should be fine.

 

[ZZROCOOL]

Joey,

D2

 

[joey]

Well the codes you have are Cat getting bad gas, and random misfires. If all you have done is change the plugs... I would consider checking or changing them again. I would also make sure the air box is sealed properly as this will cause issues (they tend to not seal) Might also check your wires to ensure they are still good (dark at night open hood with engine running and look for spark...

 

[Disco Mike]

I bet you didn't replace the grey factory plug wires, if not, that is the problem, need to install some 8 mm STI or Magnacor wires to correct that misfire.

 

[ZZROCOOL]

Mike or Joey,

Where in the rave manuel does it describe the procedure for changing the wires?

 

[ZZROCOOL]

found it never mind

 

[Disco Mike]

There is a better way to change the wires. Send me your number and I'll call you to walk you thru what wires to use and how to install them.