tach wire

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=122461
Printed Date: May 03, 2024 at 6:59 PM

Topic: tach wire

Posted By: xxunknownxx
Subject: tach wire
Date Posted: June 28, 2010 at 7:17 PM

Hi, Im new here my name is Brad.

Ive done some searching on this topic. First of all we have two vehicles in need of a tach wire. My 00' Crown Victoria and my brother's 97' P71 Crown Victoria.

I'm aware that I can tap into the PCM but space is a bit limited and I don't think i can get in there with my soldering iron. But my question is....can I tap into the uncommon wire on the fuel injector.

Wiring diagrams suggest this for the 2003-up models....but I was curious if I could do it on the 2000 model an the 1997 model.

I know I could use the coil on the 1997 model but I would have to extend the wires...I'd rather use the injectors on both cars. Is it possible.

2003 -2004
TACH Any wire that is NOT RED or RED / LIGHT GREEN @ IGNITION COIL or FUEL INJECTOR

Replies:

Posted By: xxunknownxx
Date Posted: June 28, 2010 at 7:18 PM

I dont know if it helps but both of the remote starter units are Avital 4113l.

Posted By: KPierson
Date Posted: June 28, 2010 at 7:29 PM

You should be able to do that with no issues. Try it out and if you have problems with it use a different tach source.

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Kevin Pierson

Posted By: xxunknownxx
Date Posted: June 28, 2010 at 7:33 PM

KPierson wrote:

You should be able to do that with no issues. Try it out and if you have problems with it use a different tach source.

Awesome. Thanks :)

Posted By: xxunknownxx
Date Posted: June 29, 2010 at 2:52 PM

All went well :) Starts with no problem. Programmed on the first try and no overcrank or undercrank.

Now its time to tackle the malibu....that normally takes 3 seconds to start. Theres no way tachless would work for this car.

Ive tried everything to fix the hard starting issue. New starter new flywheel. Car runs perfect so i gave up lol :)

Posted By: tedmond
Date Posted: June 29, 2010 at 5:36 PM

depending on the year of the malibu. some use mux or multiplexed systems, and it will never grind or fail a start.

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Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert

Posted By: edoubled
Date Posted: July 01, 2010 at 1:57 PM

If i remember correctly the rule of thumb is always Ford go to a fuel injector, Chrysler go to a coil. Ive had issues before with Ford cars not cold starting in the winter very well with a coil tapped in so fuel injector was the best way to go.