Hi everyone, i recently posted on this forum because i was having misfires on the whole bank a. I ended up changed my spark plug wires with kingsbourne 8mm wires and i also changed my spark plugs with some cheap ngk replacements.

Before changing both of these parts i was pulling codes
p1300
p0300
p0301
p0303
p0305
p0307
p0174
p0130
p0150

Now im getting
p0305. I also have p0307, p0130, and p0150 pending.

My truck is a 2000 discovery ii with 130000 miles under the hood. also i recently had a head gasket job done because i had coolent in my oil. I already plan on changing all four o2 sensors i just cant wrap my head around this misfires... Any suggestions?

 

Re-check plug wire route and connections - sometimes plugs wires get swapped...

 

Will do tomorrow but is there any other suggestions you might have? This has been going on for 6+ months and im really trying to solve this

 

Is it like a dead misfire, where it misses all of the time? Or do you not really notice it, except that you get the check engine light?

 

It misses every once in a while but not dead. Runs much smoother after changing plugs and wires but I still get that misfire. Before tune up my motor was shaking horribly but now seems to be running much better. Im planning on cleaning my maf sensor tomorrow, will post results

 

P0130 and P0150 are codes for front O2 sensor short circuit, wiring or connector issue.