tach signal on a 2004 audi a4

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=104552
Printed Date: July 12, 2025 at 4:29 AM

Topic: tach signal on a 2004 audi a4

Posted By: da_reeseboy
Subject: tach signal on a 2004 audi a4
Date Posted: May 07, 2008 at 5:15 PM

I am installing an HKS Turbo Timer (type 1) on my wife's 04 A4 1.8t. I have searched and found wiring info saying to use the injectors or ignition coil signal wire. Using either an injector or signal wire on a coil pak it only reads 1/3 of the actual RPM. Is there another source, perhaps on the back of the gauge cluster, that I can get a signal?

-------------
- Jesse

Replies:

Posted By: dtk1
Date Posted: May 07, 2008 at 7:15 PM

Tachometer NOT RED / blue or BLACK/ blue any fuel injector

Posted By: da_reeseboy
Date Posted: May 07, 2008 at 7:32 PM

As I said, I tried that already. Off the fuel injector, it is only reading 1/3 rpm.

-------------
- Jesse

Posted By: howie ll
Date Posted: May 08, 2008 at 5:20 AM

That should be adequate, if not check pins on engine management, one will be tach.

Posted By: da_reeseboy
Date Posted: May 08, 2008 at 10:28 AM

Does anyone have the ecu pinout? That would help greatly.

-------------
- Jesse

Posted By: da_reeseboy
Date Posted: May 09, 2008 at 12:33 PM

I guess no one has the pinout? bummer...

-------------
- Jesse

Print Page | Close Window