If it is back firing through the exhaust, it is not running good because you are putting unburned fuel into the exhaust, bad spark plug or leaking exhaust valve, you need a compression test to start, you may as well change the spark plugs while they are out
Testimonial: "Thank you for your help, I think you are on the money, wanted to make sure it was not a sensor out of wack."
SOURCE: 1992 mitsubishi pajero 3.0 V6 PETROL.how many litres of engine oi
Engine what????
Oil = 4.5 Litres or 1 Imperial gallon
SOURCE: ford focus 1.6 zitec petrol, engine warning light
try the air filter first and the intake.the spark plugs then and after all go to a garage for checking compression timing and the head gasket.
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