bern_supra

iTrader: (1)

I've started my S5 T2 set up yesterday . It started up really well , idled at 1800 rpm with 12-12.5 A/F ratio . But after around 10 sec , engine cut and falls to 1000rpm and seems from the tests I've made that the Ecu stops trigering the front primary injector , so it runs only on the rear rotor .If I put switch to off and restart , same thing , 10sec then boom . If anyone has an idea of what that could be ...

I think it's possibly falling into limp mode but I don't know what's the symtoms when it falls into this mode .

Thanks Everyone !

SirCygnus

iTrader: (1)

what effing switch are you talking about?

dont you know how to diagnose a problem?

bern_supra

iTrader: (1)

The ignition switch ,thanks for the help .....

barkz

iTrader: (1)

1800 is a HIGH idle... 1000 is still slightly higher than normal. have you driven it? or you just think that because your idle dropped its broken?

bern_supra

iTrader: (1)

it revs at 1800 when it starts cold then for some reason , ecu stops trigering the primary injector on the front rotor .... I have a code 3 (crank angle sensor G signal) but all resistance are good and wiring between ecu and CAS is OK . I've tried a diferrent CAS and ECU but still no difference .

barkz

iTrader: (1)

and you know its cutting fuel to the front rotor how? cuz fuel cut goes to the rear rotor...

bern_supra

iTrader: (1)

because I've put a led test light on the primary injectors pin out on ECU and the light green , wich is the front primary injector . I've managed to get the idle running today by adjusting the TB but I still get that missfire when hold throtle steady at like 10-15 % and rpm bouces up and down at the same time .

SirCygnus

iTrader: (1)

you are testing it wrong. you measure the resistance between the pins of the injector.