bucking fix (richen)
bucking fix (richen) hello, need a sanity check.
my car bucks pretty good at 1700ish at ~70 kpa. when i command 13.5 or so, it smooths out a lot.
if i richen the VE table in those cells, wont it just fuel trim its way back to '14.7'? would love to get out of bucking, and not really wanting to do OL.
my car bucks pretty good at 1700ish at ~70 kpa. when i command 13.5 or so, it smooths out a lot.
if i richen the VE table in those cells, wont it just fuel trim its way back to '14.7'? would love to get out of bucking, and not really wanting to do OL.
Most of the time, you can tame some of the buck by knocking the timing out of it. But with that cam, you'll never get all of it out.
BTW, I'd probably be running that thing OLSD anyways.
Can you post, email a datalog and your tune? From start up, including about 30-60 seconds of idle, and then some cruising.
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At 70kPa you might well want to be in PE mode but
maybe the 1700RPM is holding you off (see PE enable
RPM).
I guess this must be a M6 car because no decent A4
converter would let you lug it like that. And that maybe
is your real answer, "powerband management" by the
stick.
maybe the 1700RPM is holding you off (see PE enable
RPM).
I guess this must be a M6 car because no decent A4
converter would let you lug it like that. And that maybe
is your real answer, "powerband management" by the
stick.
I had been trying to fix this same problem with my setup. just recently figured out what the car likes to minimize the 1600 RPM bucking. A LOT of timing and a LOT of fuel. I set up 43 degrees of timing and 13.0:1 AFR in those cells and the bucking has gotten much better. As soon as I lean it out in those cells, the bucking comes back and if I take out timing the bucking comes back violently. So, I say no, this isn't unusual. In fact it's the only thing that worked with my car. And yes, for me it's between 60-75 kpa (car idles at 70-75 kpa).
Derrick
Derrick
I'm running a maf tune, well I tuned in SD and then enabled the maf again, on my car and get some bad bucking around 1600rpm. I've got the timing up to 44 in that area, no knock, but still bucking. I've been wanting to richen it up in that area but I'm not sure how since I'm running a maf. Can someone help?
Last edited by jimmypop13; Oct 11, 2008 at 11:04 PM.
