What would cause a loud popping or puffing noise when trying to start a car?

What would cause a loud popping or puffing noise when trying to start a car? 2 Answers

2005 Ford Focus - When I start my car it makes a loud vibrating noise, when I put it in reverse it seems to quiet down some. When I press the gas pedal it vibrates the car and is very loud. Does anyone know what this could be? I have been looking online and some people have been saying to replace the motor mounts. I took it to a couple different places and I keep getting different things so I am not sure what is right. 8 Answers

2005 Ford Focus - When I start my car it makes a loud vibrating noise, when I put it in reverse it seems to quiet down some. When I press the gas pedal it vibrates the car and is very loud. Does any...

what would cause brass or gold metallic power on driver side body panels of a 2007 ford focus there is a scraping sound coming from front of car 2 Answers

what would cause brass or gold metallic power on driver side body panels of a 2007 ford focus there is a scraping sound coming from front of car. some one said the trany but it is sealed and never los...

my 55 plate 1.6 focus is lacking power and making a loud popping noise at low revs. any ideas what could be causing it? 1 Answer

i have replaced plugs and leads, checked each plug to ensure it is firing, its reving ok, but has lack of power and misfires under load especially at low revs

Ford Focus 2012 loud popping noise without it being on?? 4 Answers

I went to open the trunk of my 2012 Ford Focus and this very loud popping almost bubbling noise just started out of no where. The car wasn't on and haven't been turned on prior. I turned in on afte...