Why wont your 89 Mustang start you have to pump the gas and black-ish smoke comes out once you get it to start you just put in new spark plugs is it going to cost you an arm and leg to fix?

Answer 1

When there is a problem starting a car and you have to pump the accelerator pedal to push gas into the carburetor, you have nearly flooded the carburetor and the excess gas come out the tail pipe as blackish smoke. If the car stays running and there still is black smoke coming out, the carburetor is flowing too much gas than air to combust properly. Normally this type of car has electric fuel ignition to adjust the air/fuel mixture with the timed firing of the spark plugs to ignite the gas in the cylinders. Might want to get a computer diagnostic check to see if the EFI computer chip is not misprogramed due to the length of time it ran with excessive gas and/or check to see if you need to adjust the carburetor.