inverted56

Hi my Audi a4 wont rev past around 2500 rpm the shop I took it to told me it needed a new throttle body so I got a new one and replaced it myself the car is idling low and when I hit the gas the rpm go to 2500 then quick go back down to idle and if I hold the gas down it will just go up and down and sometimes stall if I rev the car with my hand from the throttle body as so as I start to rev I hear a faint sucking noise idk I think its prob just the intake but do you think it is a possible vacuum leak i just dont know what it would be and its running a little rough and low idle but if I bring up the rpms just a tiny bit it runs smooth at about 1000 rpms

GTA_Driver

Did the shop scan the car for codes? What codes are showing up? Likely a vacuum leak. Scan the car for codes. Is the check engine light on? Does it actually work?

inverted56

[QUOTE=GTA_Driver;24371155]Did the shop scan the car for codes? What codes are showing up? Likely a vacuum leak. Scan the car for codes. Is the check engine light on? Does it actually work?[/QUOTE im not sure if they did they just told me that that's what it needed I sprayed all the vacuum lines with carb cleaner and didn't find any leaks no check engine light when I bought the car it ran fine I drove it home and parked it and the next time I tried driving it it acted up but I did turn the car on and off when I got it multiple times but the next time I started it was acting up

4Driver4

Did you do a throttle body adaptation after you installed the new throttle body? Your symptoms are typical of a car that needs a TBA.

Prospeeder

Ya you cant just throw the throttle body on and thats it. It must be adapted to work correctly or else exactly whats happening happens