Technical 2011 Fiat 500 poor starting

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Technical 2011 Fiat 500 poor starting

mistuart

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Aug 20, 2005
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Hope someone can help as I’m pulling my hair out and I don’t have much left
My 2011 Fiat 500 1.2 8v has been steadily getting worse starting from cold, when I get it running it’s fine with no misfire or stalling
Car turns over but doesn’t fire.
Takes 3 attempts and around 20 seconds with the accelerator fully pressed.
I have looked for fault codes with an Autel reader but non are present.
I have changed the fuel pump, spark plugs, coil/ leads, battery, coolant temp sensor and cleaned all earths/ replaced braided earth lead.
I have noticed if I disconnect the throttle body plug and manually open the butterfly valve it will start first time every time!!!
Has anyone else had this or can suggest anything
 
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