Putting diesel into your petrol engine is a problem that’s more common than you’d think. What with modern diesel engines being quite silent and some older petrol engines sounding like diesels? Many cars these days don’t even have many external badges to distinguish them and the poor fuel pump attendants often make mistakes.
Symptoms of diesel in a petrol car - What can go wrong if you put diesel in a petrol car? Diesel is a heavier fuel than petrol and also more oily. The first part that gets affected is the fuel filter, which will tend to clog up quite quickly as diesel is relatively more oily. That itself should begin to make your car stutter and stall. The second part to get affected would be the spark plugs, which will foul up with soot build up because of the diesel mixed with petrol. Your car will emit lots of white smoke as well and lose power before it stalls completely.
What to do if you’ve put in the wrong fuel? - In a petrol car you will need to change the fuel filter and clean the spark plugs. With a diesel vehicle, open the drain plug at the bottom of the filter and drain out any fuel in the filter as well. Then prime the vehicle using the manual diesel pump and start it.