The MegaSquirt Project has experienced explosive growth other the years, with hundreds of new MS installations occurring every week - a phenomenal success! MegaSquirt has been successfully used in all aspects of Internal Combustion engine applications including R&D, Industry, Race, and Research. The MS project has transformed itself from a simple R&D project into a full-featured mature engine control system. To reflect this the support structure has also changed to meet the needs of MegaSquirt Users.
Moving forward, the R&D forums for MegaSquirt project are in a read-only mode - no new forum posts are accepted.
However the forums will remain available for view, they still contain a wealth of information on how MegaSquirt works, how it is installed and used. Feel free to search the forums for information, facts, and overview.While the R&D forum traffic has slowed in recent years, this is not at all a reflection of Megasquirt users, which continue to grow year after year. What has changed is that the method of MegaSquirt support today has rapidly moved to Facebook, this is where the vast majority of interaction is happening now. For those not on Facebook the msextra forums is another place for product support. Finally, for product selection assistance, all of the MegaSquirt vendors are there to help you select a system, along with all of the required pieces to make it complete.
For discussing how to choose sensors and create a wiring harness for all Bowling and Grippo versions of the MegaSquirt® EFI controller.
Forum rules Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
I'm looking into wiring a Knock Sensor into my MSII v3.57... I found a Knock Sensor amplification part called Knocksense and also I find Diagrams for making my own amplifier. What I can't figure out, I already have a knock sensor, but its 3-pin (stock VW). Everything else (unit and diagram) is for a 2-pin Knock sensor. What am I missing?
Southcross wrote:I have to be missing something somewhere....
I'm looking into wiring a Knock Sensor into my MSII v3.57... I found a Knock Sensor amplification part called Knocksense and also I find Diagrams for making my own amplifier. What I can't figure out, I already have a knock sensor, but its 3-pin (stock VW). Everything else (unit and diagram) is for a 2-pin Knock sensor. What am I missing?
The 3rd wire is for the shield (grounded) so it's essentially a 2 wire.
Southcross wrote:I have to be missing something somewhere....
I'm looking into wiring a Knock Sensor into my MSII v3.57... I found a Knock Sensor amplification part called Knocksense and also I find Diagrams for making my own amplifier. What I can't figure out, I already have a knock sensor, but its 3-pin (stock VW). Everything else (unit and diagram) is for a 2-pin Knock sensor. What am I missing?
The 3rd wire is for the shield (grounded) so it's essentially a 2 wire.
Wiring to the Knock sensor, I only have the single core-shielded wire. So would it be acceptable to wire the pins 2 & 3 to the shield right from the sensor? Or would I need to find a dual-core shielded wire, then join 2 & 3 at the knock box??
gofastant wrote:
The 3rd wire is for the shield (grounded) so it's essentially a 2 wire.
Wiring to the Knock sensor, I only have the single core-shielded wire. So would it be acceptable to wire the pins 2 & 3 to the shield right from the sensor? Or would I need to find a dual-core shielded wire, then join 2 & 3 at the knock box??
I'm not familiar with the difference between single or dual core shielded wire but I would leave the shield entirely seperate from the circuit. The shield's purpose is to absorb stray electro-magnetic fields and bring them to ground. You don't want that interference in the signal.
uhm... the Shield IS the sensor ground on the 2-wire knock sensors. The 3-wire litterally has two grounds... I question if one is just a sensor ground and one is just a shield, or are they both the sensor ground and need "fused" together at some point before the knockbox?
