djhedges

A bit of a follow up. You were correct in that the trigger wheel was bent. After swapping it we now see a better trigger scope and zero error counts.

Yes it was connected to a laptop. Although for a while I had an ouput always powering the brake lights which the killswitch would turn off even if a laptop was connected.

I attempted to wire the killswitch per the attached diagram but it didn't quite work. I ran a wire from the Z terminal to the PDM for the IGN SW pin On the other side of the Z terminal I ran a jumper wire to the alternator & starter side of the power Normally the power to the coils is run on the Z terminal which in the off position is disconnected. I think the car has this killswitch based on the Z & W labels I'm seeing on the back. I'm still confused as to why the car kept running with the killswitch in the off position. https://www.pegasusautoracing.com/document.asp?DocID=TECH00109

I got it to idle on it's own by cranking with the throttle open a bit for a minute or so. I think the header is either cracked or has a hole in it. I've not run these headers before. I did try a number of things before starting it. Ran a seperate shielded wire for the trigger signal to the ECU, swapped crank position sensors with an older one and I swap out the spark plugs. I didn't snag any logs unfortunately and the trigger scope looks the same. My next steps are to swap the headers and figure out why the killswitch didn't work. I apologize for the music in the background. I couldn't hear it over the exhaust.

ICM 0227100209 https://www.autohausaz.com/pn/4A0905351A (Although the picture looks different but it has 7 pins) Coil 0221503002 https://www.autohausaz.com/pn/00098 Crank Sensor 0261210107 https://www.autohausaz.com/pn/0261210107

I also pulled all the spark plugs last night and cranked the engine. With the timing light set to 10 it lines up with the TDC marks on the crank pulley.

I tested fuel pressure before the fuel filter and before the fuel rail. It held >60 psi for 10 minutes after priming the pump in both locations. I also replaced the fuel filter while I'm here. I then tee'd the fuel pressure gauge inline with the fuel rail and watched it as it was cranking. It stayed in the 55-60 psi range. This was with an additional 50% fueling. I also logged the PDM this time. I'm dubious there's anything useful there. corrado_20240122_00_50_fuel.pclx PC Datalog - 2024-01-22 6;35;13 pm.llgx Trigger Scope - 2024-01-22 6;35;29 pm.llgx 20240122_00.pdmlog

I haven't touched any of the fueling parameters other than experimenting with some of the cold start settings. I did try lowering the trigger 1 arming threshold by 0.1 across the row and tried setting a target idle rpm of 1200 in this last attempt. PC Datalog - 2024-01-21 9;15;32 am.llgx Trigger Scope - 2024-01-21 9;16;05 am.llgx corrado_20240119_01_idle_rpm_1200_and_isv (1).pclx

First time wiring an ECU and I think we're getting close. It's finally cranking and making noises but not quite idling yet. I thought the header had a hole in it at first. I've tried a number of things Trigger offset of -84 or 276 (and played with ±10 degrees) With a timing light set to 0 the marks on the crank pulley lines up best at 6 degrees BTDC in the calibration settings I tried adding +10% fuel on cold start cranking table across the row (@ +20% there's backfires in the exaust) I pulled the spark the plugs and tested the pairs that are firing to ensure that they fire per the firing order 1, 5, 3, 6, 2, 4: IGN1 - Clyinders 1&6 IGN2 - Clyinders 2&5 IGN3 - Clyinders 3&4 If I crack the throttle a bit it idles roughly like in the video but on it's own Weeks ago I verified the injector wiring with a volt meter before installing the intake manifold Other things worth mentioning: ECT signal is from a linear 0-5v out from an AEM gauage which is reading ~10 degrees higher than the gauge itself. Although I did calibrate it against a chart from AEM. I assume this doesn't matter though. The motor has 276 cams, 11.75:1 compression and MS109 fuel Link 1.15 bar MAP sensor Link LSU 4.9 Tomorrow I plan to check if ever configured the idle stablizer valve. What else should I try? Trigger Scope - Waves.llgx

Thanks for the suggestions. So for the idle valve & purge valve should I ground those to the ECU? If so which pin?

I'm getting to build my first wiring harness and would appreciate one more review and a few questions before I get started. Below my current plan for the PDM pins. It's a NA build with 12:1 compression on stock injectors. ECU is a Link Fury. razor_pdm:ADIO1,link_ecu_a:+14V razor_pdm:ADIO1,link_ecu_b:+14V Aux9/10 razor_pdm:ADIO2,idle_stablizer_valve:Pos razor_pdm:ADIO3,vapor_purge_valve:Pos razor_pdm:ADIO4,LSU4.9:Heater Power razor_pdm:ADIO5,aux_coolant_pump:Pos # Secondary small electral water pump that had a 5 amp fuse razor_pdm:ADIO5,transponder:pos razor_pdm:ADIO6,coolant_temp_gauge:12v razor_pdm:ADIO6,fuel_pressure_gauge:12v razor_pdm:ADIO6,link_keypad:+12V razor_pdm:ADIO6,transmission_temp_gauge:12v razor_pdm:ADIO7,wiper:high razor_pdm:ADIO8,wiper:park razor_pdm:CANH,link_ecu_b:DI10/CAN2H,link_keypad:CAN High razor_pdm:CANL,link_ecu_b:DI9/CAN2L,link_keypad:CAN Low razor_pdm:IGNSW,ign_switch:2 razor_pdm:PWROUT1a,fuel_pump:pos # rockauto lists a bump with 8 amps average razor_pdm:PWROUT1b,coil:Ubatt # <8 amps according to bosch motorsports catalog. razor_pdm:PWROUT1b,injectors:Pos razor_pdm:PWROUT2a,brake_lights:pos razor_pdm:PWROUT2b,brake_lights:pos razor_pdm:PWROUT3a,starter:solenoid razor_pdm:PWROUT3b,starter:solenoid razor_pdm:PWROUT4a,spal_fan_1:pos # 7.6 amps razor_pdm:PWROUT4b,spal_fan_2:pos #6.3 amps razor_pdm:neg,battery:neg razor_pdm:pos,kill_switch:starter What is the current draw of the Link Fury ECU? I'm hoping a single ADIO pin is enough to suppor the ECU. I planned to run the coils, injectors & fuel pump off the same high output. Should I also add individual inline fuses? The car had 5v front/rear brake pressure sensors that I was planning to wire to the ECU. Is it silly to drive the brake lights over CAN to the PDM?

Gsum = x + y + z accelerometer channels It can be used to get an idea of much of the available traction a driver is using. Think traction circle.

Now that you mention I seem to recall the coolant reservoirs wicking being a possible issue. I'm torn though because having that signal could save an engine. I'd rather redo a harness then have the engine rebuilt. On the plus side race cars get wrenched on so much that hopefully I'll catch it early on. I'd be happy to take a look at a google sheet example if you have one handy. I could always export what have to now to sheets if needed.

Thanks for looking. I wasn't sure what to connect the two pin low coolant sensor from the VW coolant reservoir. If I recall correctly this is simply two pins submerged in the coolant. If coolant is present it closes the circuit. I have not seen Scheme-It yet. It's not the prettiest diagrams but I guess I've gotten used to looking at them. I found using graphviz the easiest to maintain so far. It's defined once in https://github.com/djhedges/corrado_wiring/blob/main/corrado_wiring.py by defining nodes and paths. For example. Node('icm', ['Transistor1ecu', 'Transistor2ecu', 'Transistor3ecu', 'Transistor3coil', 'Gnd', 'Transistor2coil', 'Transistor1coil']) Node('coil', ['Coil3', 'Coil2', 'Coil1', 'Ubatt']) # Coils AddPath(( ('razor_pdm', 'PWROUT3a'), ('coil', 'Ubatt'), ), 'red') AddPath(( ('icm', 'Gnd'), ('engine_bay_ground', 'Gnd'), ), 'black') for i in range(1, 4): AddPathWithMap(( ('link_ecu_a', f'Ign{i}'), ('icm', f'Transistor{i}ecu'), )) AddPath(( ('icm', f'Transistor{i}coil'), ('coil', f'Coil{i}'), ), 'white')

I recently purchased a Link Fury X and Razor PDM for a small winter project. I'm rewiring a 93 VW Corrado race car. This will be my first time wiring a car and I think I might have most of the wiring planned out. I would appreciate if someone could take a second look and see if anything looks wrong. The image below is the wiring between the ECU and a Deutsch connector I'm planning to use to make pulling the engine easier. As an example the crank position sensor will use pins 7, 10 & 11 on the Deutsch connector which correspond with +5v, Trig2 & Shield/Gnd on the Loom A connector. Theres also invidual graphs per node such as the various sensors and connectors if the image below is too busy in some areas. https://github.com/djhedges/corrado_wiring As an example.