boost gauge install now car wont start

[1b72nv]

Hey guys run into a little issue yesterday arvo, decided it was time for the gauge install and i felt everything went smoothly got the gauge to light up etc everything ready to start the car and check the full operation of the gauge and the car wouldn't start........ it cranks no issue at all and there is plenty of juice not struggling to crank at all but she just wont fire up.


i backtracked and went over my steps several times and made a few improvements to connections etc but still the same.
uninstalled the gauge completely disconnecting it from the car, car still won't start. i took it upon myself to replace all the fuses as im not sure which one would have gone as they all looked healthy.
one thing i noticed was when you turn the ignition to on before you crank it that distinctive sound of the fuel pump priming wasn't there i couldn't hear it at all so i replaced the fuel pump fuse and still no luck.

i'm lost here, any insight would be greatly appreciated thanks in advance!!

car is a 2005 b7 a4 2.0tfsi bgb sline quattro 6spd running stage 2

[oVeRdOsE]

hopefully you have the same issue that I had, which was put the fuse back in the wrong hole.

fuel pump fuse and the empty space are near each other.

[nick1980]

Unplugged something during install I bet
Sensor or a major vacuum leak .
Double check everything you touched

[EvolutionArmory]

You should have bought a test light and just probed your fuses and found any that were not working instead of just replacing them all. There’s also a couple important engine fuses in the ECU compartment.

I agree that you should check your engine bay for sensors that might not be plugged in.

[EvolutionArmory]

Where did you tap into for a boost source? A pic of your install would help.