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Gtir Motorsport club » General Discusion » Gtir related Discussion » Fuel missfire

Fuel missfire

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1 Fuel missfire on 3rd August 2017, 1:28 pm

Zia


Got my gtir taxed and insured.but having a massive missfire at idle.running and sounding like a scooby.
No 4 cylindar is not running properly.sparking ok but no fuel going in.checked the injector works ok.even swapped with known good one.
On further investigation getting 12v too all injector both side of the harness plug no 1 2 3 on white coloured wires are being switched to ground and working fine.
But no 4 is not grounding properly.have done continuty test and from resistor pack to injector wire is fine. Any help would appreciated

Thanks zia

2 Re: Fuel missfire on 3rd August 2017, 6:18 pm

johnny gtir

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moderator
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Totally guess Ecu related then. What Ecu did you say you were running or changing mate ?

3 Re: Fuel missfire on 3rd August 2017, 6:22 pm

Gostek

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Events Organiser
Events Organiser
Yeah if I'm nit mistaken injector earth is controlled by ecu. Check you wiring from ecu to injector first before bining ecu...


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4 Re: Fuel missfire on 3rd August 2017, 8:02 pm

Zia


Totally guess Ecu related then. What Ecu did you say you were running or changing mate ? wrote:

Standard with motec m4 pro in piggyback mode.motec does all the fueling,ign and some additional sensors,all other sensor go to stock ecu.

Worse come to worse i do have stock ecu and i could swap over

Zia

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