Quote Originally Posted by Sahail View Post
hi,

I have an audi A4 2,0 auto. I have scanned the car, and got the above code 17887. car is jerking alot and idle is okay

car just had a full service and I changed the breather hose from the valve cover, however its still hesitating on acceleration. Feels like some one holding you back and then letting go. car seems fine when started from cold and gets rough once warmed up.

There is a slight hissing sound near the vacume hoses by the firewall, but cant see a leak and not sure if this is just normal. Is there any vacume pipes under the intake?

also noticed that there is more hesitation on uphill roads.

any help will be much appreciated.
Did you perform the output test for your brake booster vacuum pump ? It turned out that my pump was shot, giving the 17887 code.

Here's the test just in case :

008,0,General (Brake System)
008,1,Brake Condition,,Range: Operated/Not Oper.
008,2,Vacuum Pump,Status,Range: Pump ON/Pump OFF
008,3,Brake Booster,Pressure
008,4,Result,,Range: Test ON/Test OFF/Sys. OK/Sys. not OK\nSpecification: Test OFF
;
B008,0,Vacuum Pump Test (Short Trip)
; Engine OFF, Ignition ON, Shift Lever: P/N
; "Activate" Basic Setting
; Firmly press Brake Pedal twice > Field 4 = Test ON
; Wait until Field 4 shows "Sys. OK"
B008,1,Brake Condition,,Range: Operated/Not Oper.
B008,2,Vacuum Pump,Status,Range: Pump ON/Pump OFF
B008,3,Brake Booster,Pressure,
B008,4,Result,,Range: Test ON/Test OFF/Sys. OK/Sys. not OK\nSpecification: Sys. OK