Technical > Wiring & Sensors

Idle Control VW 1.8T AEB

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Thomas_1.8T:
Hi Guys.

My name is Thomas and I'm from Germany. My current project is a Passat 3b 1.8T with K16 Porsche turbocharger. Because in my near nobody knows about the old Motronic 3.8.3 or 3.8.2 I made the decision to try it with the VEMS. The vehicle starts and drives in part load nicely on Lambda 1. My current problem is that I do not get the idle control on the original throttle. I do not know where I should clamp the idle switch on the Vems and tell her that she should then stubbornly regulate it. Maybe one of you has a hint for me how to solve this. Have now just the first few degrees of DK hidden.

Greetings Thomas

PS: Sorry for my english, Google has translated

ChrisAudi80:

--- Quote from: Thomas_1.8T on August 15, 2018, 07:31:31 am ---Hi Guys.

My name is Thomas and I'm from Germany. My current project is a Passat 3b 1.8T with K16 Porsche turbocharger. Because in my near nobody knows about the old Motronic 3.8.3 or 3.8.2 I made the decision to try it with the VEMS. The vehicle starts and drives in part load nicely on Lambda 1. My current problem is that I do not get the idle control on the original throttle. I do not know where I should clamp the idle switch on the Vems and tell her that she should then stubbornly regulate it. Maybe one of you has a hint for me how to solve this. Have now just the first few degrees of DK hidden.

Greetings Thomas

PS: Sorry for my english, Google has translated

--- End quote ---

VEMS cannot completely control the 1.8T IAC. I have done it as follows on my AEB:

pin T80/66 (TB pin1) to EC36-6 (Inverted)
TB pin 2 to EC36-25 (12v)

Config:
200Hz PWM
Range 30 to 99% DC
Start with 60%DC to see what happens.

See here for source: https://forums.vwvortex.com/showthread.php?5809274-VEMS-iac-help

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