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When engine is cold ,i get a hard start - 2005 Mazda 3

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This can be caused by many things like a bad fuel pump not holding preasure or a bad coolant temp sensor giving a false reading or bad module. the best thing would be to have a scan tool hooked up and look at all the input and output readings to see if something is off, and also a fuel preasure gauge to watch the preasure. this is going to need a shop otherwise youll be geussing and thats expensive, sorry i couldnt help too much.

Posted on Aug 06, 2010

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Posted on Jan 02, 2017

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