fc3sfreek

iTrader: (6)

Every time i start my car up in the morning i have to sit and warm it up for like 5 mins. because it backfires very loudly and accelerates bad. then after those 5 mins my car will idle up and down from 1500 to about 1200 rpm until my engine is warm then it drops to 800 rpm. anybody know why this is happening?

emac

check your tps or acv

fc3sfreek

iTrader: (6)

I dont think it can be the tps because it stops after a while im thinking it might be the BAC. and do you think that removing the air pump had anything to do with it?

emac

unhook the bac and see if anything changes.

s4 or s5?

zero83

iTrader: (7)

I'm having the same problem, but I was leaning towards the tps because it didn't start doing this until I changed the TB.

fc3sfreek

iTrader: (6)

my car is an 86 S4. ill try disconnecting the bac and see what happens

fc3sfreek

iTrader: (6)

well i tried disconnecting the bac and it does the same thing basically so im assuming the BAC is bad

fc3sfreek

iTrader: (6)

i disconnected the bac and the car did the same thing so im assuming the its the BAC that is bad