Details:
1993 Audi 80/90 Quattro
1997 Audi A8 4.2 liter V8 engine with sequential injection and coil-on-plug ignition.
Using a 60-2 trigger wheel on the crank with a VR sensor from the 1993 12v V6.
17 Oct 2005 -
IT RUNS!
Well it has been rough going, but I can say that most of the glitches and BS have been caused by bad ground connections and ghost values left over from the config file I used from Marcell's 4 cylinder turbo motor.
The problem with the USB/serial adaptor crashing when the engine starts was caused by a loose ground on one of the coil arrays. It was hidden behind another wire so I didn't notice it. Let that be a lesson to me.
The engine would start but not run at all until I zeroed out all of the values other than what I knew applied directly to my engine. The early advice was to use a working config regardless of the motor it came from but that proved to be more work that if I had started from scratch. The VE map that megatune created seems to have been ok and VE learning has re-written the spark map after just a few minutes of playing the throttle at operating temp.
- I'm still interested of what happened when engine did not run well, was your map value low as it should, like 20-40kPa or was it much higher? Or was it only config related so engine did not get enough fuel (or was it too rich) no matter what, but it was flooded when afterstart was enabled?
See the links below for the VE and spark maps. There has been some good info from the various VEMS brothers that I'll try to preserve along the way, although this page is going to get way too long and confusing so I'll be editing.
USE THIS INFO AT YOUR OWN RISK, I AM NOT SMART
Being that my own project was about to join yours in the Pacific, I loaded your config into my board so I could read it, here is what I think, KEEP IN MIND, MINE IS WORKING, JUST DIES FOR A SPLIT SECOND
BASIC SETTINGS
- fuel cut under (kpa)- make it appr. 8..14 kPa for now.
- overrun-fuelcut - fuelcut above this RPM if TPS < (idle-)tps_threshold. overrun_fuelcut at 5700 RPM and overrun_fuelresume at 5500 will get it out of the way for now.
- map sensor range -I assume you are using the 250kpa sensor? Looking at some other peoples configs, I think it should be set to 250 and then change the offset till you get the correct baro pressure for your area. Maybe its not a big deal, but every little bit helps.
CONSTANTS
- barometric correction roughly: adds 4% fuel if pressure at startup is -10% (eg. on a high hill) compared to normal. In fact it's a linear function, and insane values (too low baro) are eliminated. Inactive is OK, especially with WBO2
PRIMARY TRIGGER
- with a multitooth wheel, the filtering MUST be set to off
- crank min_period event-period (that is time for 90 crankdegrees for an 8 cyl) less than this is considered error (make it slightly less than period for max RPM)
FUEL PUMP
- pump on after power up dont really need 5 seconds, 2 is normal
Fill in these pages with all the required info and watch your config be pretty much built for you
MembersPage/BenNesbitt/IgnitionPage
MembersPage/BenNesbitt/WBsensor
MembersPage/BenNesbitt/FuelPage
MembersPage/BenNesbitt/InputTrigger
MembersPage/BenNesbitt/IdleControl