Major bucking/jerking

[A4 Lemon]

Hey guys, it was recommended I post here and ask if anyone local has a VAGCOM to figure out what's wrong with my car. I live in Riverside. When applying throttle the car starts bucking bad. I ruled out coils and plugs. Unplugged the MAF hoping it would go into limp and improve but it didn't. I unplugged the MAP sensor (im assuming thats what it is) on the IC and it improved like 80%, but still misfires at highway speed when applying throttle in drive. I have to reduce load by dropping into sport and getting the rpms up. I'm wondering if unplugging the MAP richened it up to reduce a lean misfire issue. Seems like it's failing at fuel enrichment the moment boost starts even a little...feels like having no accelerator pump on an old carbureted car. I'm broke so I can't afford to blindly buy new sensors until I figure it out. It's an 07 A-4 (b-7), bone stock with 114k. Thanks!

[A4 Lemon]

Ever seen a bad o2 do this? I never kept any of my cars long enough to ever experience an o2 go bad.

[skitso1080]

what area are you from, ton of guys with the vagcom can help. are you throwing any codes?

[A4 Lemon]

I think I may have someone who can help. I live in Riverside off van Buren/91. But I just noticed your Sig...32psi? Wow! Any times with that thing? 91 octane? I'm assuming u have alky/methanol injection? That's how my Buick GN was set up, but at 23psi

[skitso1080]

If not there are some Inland Empire meets you can follow ACIE (audi club of the inland empire) on facebook, there are a few people that have the vagcom. usually the sensors are what go bad and a simple replacement can resolve things real quick.

As far as my setup, i dont have alky/methanol yet i use corn syrup in a 15% blend to reduce my detonation, the 32 psi is at 33 degrees Fahrenheit, it is more like 35 psi at 72 degrees. but the spool in the air in my tires is unmatched. i use a short throw valve stem for better traction and 60 foot times. :)

[A4 Lemon]

If not there are some Inland Empire meets you can follow ACIE (audi club of the inland empire) on facebook, there are a few people that have the vagcom. usually the sensors are what go bad and a simple replacement can resolve things real quick.

As far as my setup, i dont have alky/methanol yet i use corn syrup in a 15% blend to reduce my detonation, the 32 psi is at 33 degrees Fahrenheit, it is more like 35 psi at 72 degrees. but the spool in the air in my tires is unmatched. i use a short throw valve stem for better traction and 60 foot times. :)

Well I hope you have 120 octane blinker fluid to keep you from crossing the center line. Helps to have 20 degrees positive camber on your right front and left rear wheels too.