Throttle micro switches

109BBS

I am having a problem with the throttle switches. In the manual it states:"When the switch is activated, it lits green." But when I tested the switches they worked in the exactly opposite ways. Do I switch the wires? Did I wire it up wrong?

petrolhead

Choose custom engine settings, and check the "Throttle switch inversion" box.

109BBS

I chose it and it didnt change the sensors turning green or not in the panel but does it change how the ecu understands it?

109BBS

I also tried changing the wires but it made it even more confusing (i.e both sensors being activated at the same time, idle turning off only at WOT etc etc). I bought new sensors and tested them. The old and the new ones behaved exactly at the same way.

109BBS

log-ukri-ecu-v415-20250810-122917.csv

33kB

I chose inverted throttle position and tried to start the engine and unluckily it didnt start. Heres the logs to whoever understands it.

JHM

Check for 12v supply for the switches. It looks like there's no supply.

109BBS

JHM what switches?

JHM

109BBS
Throttle switches: Full load and idle.

109BBS

I switched the wiring in case it was mixed up. In the ECU Commander it shows when moving the throttle that it gets signals.
New start logs included.

log-ukri-torupomm-v415-20250825-172735.csv

18kB

JHM

Throttle switches are still not working properly (Fullload is active instead of Idle)
RPM signal is missing

109BBS

I was tracing the problem and found that the stock ecu 10a fuse had blown (so the rmp reading is probably fixed). After fixing it i didnt start the car but started testing micro switches. I had wired just like the "Upgrading my VW Mk2 Scirocco 16v to EFI | Invent Jetronic Install" video because i have a golf mk2.

I pressed down the idle microswitch and FullLoad was green, by pressing the WOT switch the Idle turned green. When the throttle is in the middle both are green. Would the "throttle switch inversion" fix this?

109BBS

When changing the setting it became normal but didnt start. Log:

log-ukri-torupomm-v415-20250828-125148.csv

45kB

JHM

109BBS
in the log, everything looks normal
maybe wet plugs?

109BBS

Can i reduce the startup fuel amount or use batch injection? I will pull the sparkplugs today and look if they are wet.

JHM

109BBS
Why would you do that? Changing settings randomly will produce random results.

109BBS

I decided not to change settings randomly and had a suspicion that there were multiple vaccume leaks. Turns out that the injector ring seals were leaking. After replacing the seals and changing the common rail bracket a little it started.