b5 s4 stg 3 won't start

[Zackaprs4]

hi my sty 3 s4 won't start just happened yesterday after sitting for a week now it doesn't run, the car has a half tank of gas brand new plugs, 2 new coils, deka 60lb injectors. the car turns over and will sputter then die, then i started it again and it was sputtering idling at 200rpm then soon as you touch the gas it stalls out like its starving for gas, previous codes that the car had was for the map sensor and maf sensor the car had a miss and was planning on getting it professionally tuned now this. if you guys know what it is thanks

[S4gasm aka LOTR]

So it drove perfectly fine before sitting? Are you forgetting to tell us anything?
Sounds like a boost leak or bad maf. Try unplugging the maf and see if it starts.

[Zba]

Fuel pressure at the rail? Sounds like a bad fuel pump.

[Zackaprs4]

no it didn't drive fine at all, i have berttos (nefmoto) tune and the car would misfire all the time and would hit boost and fall flat on its face, the codes are 16621. 16490, 16684, 16689, 17536. i had the mad unplugged and it still had the exact same issue

[Zackaprs4]

just went outside now it doesn't start at all just turns over but i can hear fuel pump, could it be clogged injectors?

[Zba]

Highly unlikely the injectors are plugged up. Did you verify fuel pressure by pressing the schrader valve in (don't get fuel in your eye!). With a crappy tune you could have fouled the plugs. Pull one out and see if its soaked in fuel. Do you have a stock edu to plug in?

[S4gasm aka LOTR]

no it didn't drive fine at all, i have berttos (nefmoto) tune and the car would misfire all the time and would hit boost and fall flat on its face, the codes are 16621. 16490, 16684, 16689, 17536. i had the mad unplugged and it still had the exact same issue

Google these codes and let us know what they come up as. Just google "vag code 16490"....etc etc.

[zillarob]

Here Codes



Where is this valve you speak of

Did you verify fuel pressure by pressing the schrader valve in (don't get fuel in your eye!).

[Drehmoment]

no it didn't drive fine at all, i have berttos (nefmoto) tune and the car would misfire all the time and would hit boost and fall flat on its face, the codes are 16621. 16490, 16684, 16689, 17536. i had the mad unplugged and it still had the exact same issue

You have mechanical not tune issues.

[Zba]

Here Codes



Where is this valve you speak of

haha, maybe we don't have one? Crack open the fuel line at the rail

[Zackaprs4]

the car ran mint before i put the injectors in i was running a stg 3- tune and it would run great other then miss a little because of my shitty stock plugs that were in the car, now that i put the dekas in and ngk bkr7e the car runs like a bag of crap, the codes are for map sensor, manifold pressure sensor, and random misfire cyl 2 and 5, you can hear my fuel pump in the trunk, last time i tried unplugging an injector, (the wire) there was no change in idle or anything even when i disconnected the map sensor ii still noticed no difference. should i swap stock injectors back in with my other ecu?