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Message: <blockquote data-quote="pussy" data-source="post: 169104" data-attributes="member: 60">okay, this a step by step dianogsis procedure..cheapest method first. 1. check with a ohmmeter on the current supply for the fuel pump, starter wire from the ignition key, should be 8.3v above. 2. also check the ignition key switch current supply or the condition of the switch, newer ones clik once, engine starts.  3. buy a bottle of redline fuel injector cleaner, prior to that make sure your fuel filter is relatively new,max 3 months - reason is clog injectors with varnish & sulhpur built-up; 4. next is the condntion of your fuel regulator, old ones can't hold the pressure therefore once the pump loads up the fuel line, the petrol returns back hence the long cranking..or check the fuel pump relay or fuse, connection blades gets often dirty or 'burnt', more resistance. 5. purge valve on M50's only, is leaking, hence can't hold the fuel tank in-pressureif the purge valve is ok, then replace the fuel filler cap. or worse case, check the purge valve hoses, front and back in the boot. 6. Crank sensor, cam sensor and TPS (trottle position sensor) needs to be check for current resistance. 7. if any modifications done to the cooling system, will also cause long cranking.. espiecally the cold start sensor/ valve.  8. As for M20's can be solved easily by getting the CO2 mixture right, ignition timming, new ignition coil, contact point rotor, etc.. hopefully this items help you guys...</blockquote>

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