Hi guys,i am new here,i just joined ,i am looking for some help diagnosing the misfire in my 2008 XC 70,i always fix my own volvos,this time strugllng with the misfire in regular scanner ,it shows only PO301,and P0302,but in bloothscanner it shows PO301,P0302,P0303,P0304,P0306,P0300,the car car turns on,drives but shaking,hesitating,i took this image if it can help

i hope someone can point out for me where is the the issue,i m assuming bad fuel injectors

 

I wouldn't expect all the injectors (or coils) to go bad at once. Aside from an anonomoly like bad gas, I'd be more suspicious of fuel trim - ie intake air leak, exhaust leak etc.

 

No mention of mileage which is always nice to know.

Have the spark plugs been checked? When checking the plugs visually check the coils. Check the intake system down stream (engine side) of the MAF sensor for damage or leaks. Check the air filter. Vacuum system leaks? Wiring to the injectors.

 

spark wiring were swapped wrongly


P

 

we've all done that at least once :-)