Brake Boosters swap ruff idle WTH???

[DeeMan]

just did a brake master cylinder and brake booster swap. brakes are fine but care idle rly ruff. its still a an auto tragic car, but in Park idles at 1000rpm and in Drive its idles at 650. Before i did the swap it idle just fine at 850. WTH is the problem??? im confused...

[Beems240sx]

check your vacuum lines around the booster to make sure everything is hooked up right

[DeeMan]

i checked the vac line that connects to the booster. both clamps are on the vac line.

[843posxe]

check the booster

[Vegascorbin]

Why did you change the booster? Was it leaking by chance? If so now that the leak is fixed the car is not getting the air it was before.

Just re-adjust the idle air controler and it should settle out fine.