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mazda___mx3 wrote:check the gas cap as well, if its leaking the gas tank wont have any pressure, You should here a some air escaping when you remove your gas cap

I just filled up and there was pressure in system I think as I've hear hissing every time I fill up.
Can I check fuel pump with voltmeter to see if it's broken?

yes it looks like you can check the fuel pump: http://www.mx-3.com/manuals/showimg.php ... F2-115.gif" onclick="window.open(this.href);return false;

also maybe read through the troubleshooting in section F2: http://www.mx-3.com/manuals/showimg.php ... F2-001.gif" onclick="window.open(this.href);return false;

check your vris solenoids. just rev the engine and make shure they both open and close 4000 and 6000 roughly rev her up. also it could be your fpr or fpr solenoid switch. you might be getting fuel cut or bogged with to much. Check your vris then check a couple plugs. What colour are they? black, white, off white, (Rich, Lean or perfect)