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= Golf Cl 91- Engine AGG 2.0 8v write-up = == MORE TO COME == *ECU v3.6 2+6 Pre-built V3harness '''Engine setup''' * Ported polished head * Headers * Catcams 266 '''Soon Catcams adjustable Cam sprocet CCR3232''' * 1.8t injectors # 0280156061 * E85 * 16v fuelpump '''Sensors''' some stock sensors from 97 mk3 Gti *MAT (G72)# 028 906 081 - '''Changed to VEMS MAT sensor''' *Coolant (G62)# 357 919 501A - '''Changed to OEM Golf Blue 2 pin sensor''' *knocksensor Volvo 940 # 0 261 231 006 Not configurated * primtrig: '''HALL''' (G28) # 037906433A '''60-2 OEM wheel''' ** HALL +5V supply from EC36/pin28 *Stock throttle body (J338) PIN 4-5&7(see picture) (using Vems builtin idle) *Wideband LSU4.2 *fuelpump Trigger OEM Fusebox relay G1/03 '''Ignition''' Wasted spark Coil- Bosch motorsport # 221 503 407 '''ECU wiring''' http://www.vems.hu/files/PatrikGolf/GolfAGG4.08v.png '''PIN Outs 2 + 6''' http://www.vems.hu/files/PatrikGolf/ECConnectors.png '''Hallsensor G28''' http://www.vems.hu/files/PatrikGolf/hall.JPG '''TPS J338''' http://www.vems.hu/files/PatrikGolf/tps.JPG http://www.vems.hu/files/PatrikGolf/1C4D5AF2-C132-459B-8258-8A8065B4CAA2-1014-0000007C862C2832_zpsf564abe4.jpg '''MAT G72''' http://www.vems.hu/files/PatrikGolf/mat.JPG '''Coolant G62''' http://www.vems.hu/files/PatrikGolf/coolant.JPG '''Tachmod golf Mk2 - 2x1N4007 Diod''' http://www.vems.hu/files/PatrikGolf/tachmod22.JPG '''ENGINE''' http://www.vems.hu/files/PatrikGolf/motor.JPG ---- '''+5V supply for BT RS232 adapter''' * measure your RS232 DSUB9 female on v3harness between pin9 and pin5 * It is better to use DSUB9/pin9 for +5V than the USB (USB connectors are rather fragile) - '''Q''' Added +5v to DSUB9/pin9 * but '''when android connects, fuel pump is turned on and will not stop''' * '''+5V from where ? EC36/28 ?''' * '''is the DSUB9/pin5 GND connected from EC18/17''' ? NO, Connected to main ground like prebuilt harness, as before I added +5v. I did measure, EC18/17 is internally connected in ECU to EC36/26. Should i change ground to EC18/17 pin? ** Can you measure with DVM that EC18/17 is internally connected in ECU to EC36/26 ? (been the standard for quite some time, but if the ECU has dual WBO2, or an old ECU, then EC18/17 is not grounded internally so GND connection from EC36/26 must be maintained externally) * Do you have some other +5V source to try? (eg. a wired-in 12V=>5V regulator, or cut the USB cable from a failed mouse, find GND and +5V, take care of polarity, and supply from a cigarlighter USB socket) * '''fuel pump is turned on when pulses detected on EC36/pin26 primary trigger.''' * for VR sensor (depending on LM1815 adaptive threshold setup), even low amplitude (eg. 140mV to allow starting in winter with depleted battery) pulses can trigger. ** however, for HALL (which provides <0.5V and >4V signal), much larger swings needed, and definitely grounds should be checked ** just the android serial stream should NOT cause fuel pump to turn on, so definitely find some GND or +5V disturbance to HALL sensor. ** Although normally should not be needed, might help: an added 47uF or 100uF (min 10V but rather 16V or 25V electrolitic) capacitor in DSUB9 housing between DSUB9/pin5 (-) and DSUB9/pin9 (+5V), take care of polarity '''A)'''YES +5v from EC36/28 NO, Connected to main ground like prebuilt harness, as before I added +5v. * I did measure, EC18/17 is internally connected in ECU to EC36/26. * Should I change DSUB9 ground to EC18/17 pin? * theoretically RS232 GND should be fine either EC36/26 or EC18/17 (as they are confirmed connected inside the ECU) ECU ground Should be OK? http://www.vems.hu/files/PatrikGolf/ECUearth.JPG What if you '''make a DSUB9 connection to the notebook with ONLY DSUB9/pin5 GND''' ? (no pin2/pin3 communications). * Does the notebook disturb the engine GND even than ? * what if notebook is powered from battery, not the mains ? ** sounds like the notebook ground injects surprising level of noise into the engine GND (or perhaps into +5V or HALL signal, but that is less likely) ** does the engine have any other connection to mains ? Like a charger attached ? ("ground loop") * do you have scope to measure these ? * '''I did notice I have a bad battery, measured 10,66 volt only, might be causing the problem? buying a new and report back later going away for 1,5 weeks''' ---- *Round with missing parts? 1 serial plug + battpower i think http://www.vems.hu/files/PatrikGolf/round.JPG
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