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Hi Guys! I own a '93 Audi 100 S4 2.2 Turbo Quattro. (Engine : AAN) I got it installed cause I wanted to have the possibility to tune the engine management as I want, instead of factory installed stuff which is a "black box" for an average car fun. It will be fine but now I do have problems : '''starting''' * first of all, '''your warm cranking pulsewidth (cwh) is way too high'''. See MembersPage/MarcellGal/PowerAndTraction/FuelDelivery ... instead of 17 / 11 msec (warm/cold), try 17/6 msec. Yes, lowered already to 18/5 approx. Ok, I mean it takes "long" time from starting rotating the engine till I hear that "fuel starts to burn", from this point it gets alive fast. ** injector settings: fire all banks (batch mode) during cranking. This way appr 5/2 msec cranking cold/low pulsewidth should work, with more balanced fuel quantity in the cylinders. My 3B starts up in appr 3 crank rotations, that is reasonable * Engine stops 3 sec. after starting if I do not press the accelerator ** typically this means that afterstart enrichment is not good (and often warmup is not perfect either) ** take logs ! Upload to FileArea. OK, I will but there's no lambda feedback in the first minute which is the critical period. It takes 60 sec in my case for the WO2 to work. *** Man '''mde02 switches on the WBO2, even if engine is off''' (useful before starting, when tuning starting/warmup). See the terminal-section below for more details ---- '''ignition''' * how to know what to enter... ? I have to learn. ** see MegaTune help and tuning-guides ** read MembersPage/PhatBob/UserGuide We will get the factory ignition map, it is not a disadvantage to know. BOSCH KTS will help in the worst case to log the motronic. WVTool does not log MAP, so result is unuseable. Does somebody know tha factory map ? rpm vs load (MAP) * board computer : fuel consumption and boost display do not work yet ** we'll need some testing for this, to find out what voltage the trip computer needs. Hopefully the bad HALL sensor (now distributer half-disassembled, preventing operation at the moment) on MembersPage/MarcellGal/PowerAndTraction/InputTrigger is fixed soon. more question : How to know the actual "tps change speed" for acceleration enrichment. Megatune does not show it. Ok, log >> short leaning will be seen. How can I get to know the keyboard commands ? * see refcard on GenBoard/MenuSystem I have to switch on the fuel pump without running the engine. * disable the fuel pump output in MegaTune (otherwise it would automatically switch the pump off soon) * exit megatune (or use the communications/terminal inside megatune) * TerminalProgram 9600,8n1 ** type "Man" to go into manual mode, see mdv, mdV, mci, mll or mxc or mcd or something that outputs something fancy to see if your connection works * mdhd0 (switch on) * mdh50 (switch off) * type ''bye'' (or reboot) so MegaTune can connect again * after you are done, enable the fuel pump output in MegaTune (or best if you don't save it in the first place! That way a simple reboot works and restores operaiont) Fuel delivery system must be checked against leakage << too high fuel consumption despite of running well, smooth, with correct lambda values. Approx 15-16 l/100km ! Mainly on road, not in city, average speed 110 km/h. Too expensive... We smelled some gas and felt some liquid leak when we accidentally pushed some part of a fuel-hose. That might be it ? L: Yes, I remember, but that was obvious. If that would be the root cause, I should smell it during driving. If there is leakage it is somewhere back, near fuel pump ?! I must check ---- '''Raised idle rpm for air-conditioner switch on''' We have to investigate this a bit further. The VEMS PNP box on your AAN definitely has the extra inputs necessary for this, but the connections and configuration needs some investigation. The factory ECU * received a "AC demand" signal from the dash * switched on the AC from an output, right ? ** Does the AC operate well ? If so, that this is probably not the case. ** Maybe there was a wired AND connection, so the ECU can pull down the signal (otherwise pulled up by the dash) and disable the AC. This would be a smart solution, because the ECU would see when there is AC operation, and could disable it as well, by only using one line (ECU pin). Br, Laszlo mail : nospam_lacus007 at yahoo dot com nospam.laszlo.horvath at sanmina-sci dot com
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