1998flamedCamaro

iTrader: (4)

I have a 1999 trans am A4 w/112k miles. Under deceleration there is a slight miss/hesitation from roughly 45-25mph. That is the ONLY time there is a miss/hesitation.

Before I installed the headers it had codes for 02 sensors. I figured this was probably the problem and knew I would soon be deleting them soon so I just didn't mess with it. Yesterday I installed the longtube headers along with an ORY.

Parts I changed along with the long tube headers:
New front 02 sensors (rears not being used)
New spark plugs
New spark plug wires
New fuel filter
New air filter
Deletion of AIR and EGR
MAF cleaning

This slight miss is still there under deceleration. No codes besides the normal codes from a header install. Anyone have any ideas?

1994Z28Lt1

iTrader: (1)

if your foot is completely off the gas pedal under deceleration how can you tell its missing? have you tried cleaning your maf? is your rpm dipping very low (lower than normal idle) have you checked or cleaned your idle air control?

1998flamedCamaro

iTrader: (4)

I did clean the maf also, no difference. My foot is completely off the pedal. You can feel the car VERY slightly "jerking". I always thought my idle was low, It is right around 450-500 at idle in drive once the car is warm. Not sure if that is "normal" or not. I will run a quick search and see.