Remote start tach problem

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=25778
Printed Date: May 31, 2024 at 7:25 PM

Topic: Remote start tach problem

Posted By: kenhamr
Subject: Remote start tach problem
Date Posted: February 03, 2004 at 12:10 PM

Problem with remote start viper 790xv. The engine start an stop after few second.

If the threshold jumper stay at OF, the unit dont learn the tach signal. (the led dosn't light below the learning process).

If the tach threshold jumper stay at ON, I think the unit learn the tach signal because the led light at the learning. After that I tray the remote start and det engine run, but after a few second it stop.

At the tach wire I have 2 V AC.

What is wrong

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Ken

Replies:

Posted By: thepencil
Date Posted: February 03, 2004 at 12:37 PM

Run the engine with the key for a few minutes. Check your tach wire and see if it still stays at 2 volts. If the votage begins to flutuate when the engines become warm you need to find another tach wire. That's one of my experience which I have came upon.

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Be careful whose advice you buy, but be patient with those who supply it. posted_image

Posted By: kenhamr
Date Posted: February 03, 2004 at 12:59 PM

Thanks I wild try it.

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Ken

Posted By: Teamrf
Date Posted: February 03, 2004 at 6:33 PM

I think on the DEI alarms after the tach is learned you have to change it back to the "off" position. But hey, I could be wrong. I just thought I read that in a manual that I have in my tool box.

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~The Rookie~
Rookie of the year that is...
Don't let the smoke out of your equiptment..it doesn't go back in.

Posted By: mobiletoys2002
Date Posted: February 03, 2004 at 6:36 PM

The new units have been having this problem try voltage sensing or maybe try a different tach source such as an injector!

Posted By: Teamrf
Date Posted: February 03, 2004 at 6:41 PM

Yea I use voltage on installs when I can't find the tach wire or something. I really don't see a problem with voltage sensing. Some of the installers I've worked with said that voltage is unreliable, but I have yet to see a voltage remote start fail.

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~The Rookie~
Rookie of the year that is...
Don't let the smoke out of your equiptment..it doesn't go back in.

Posted By: soultinter
Date Posted: February 03, 2004 at 9:05 PM

supposedly, voltage sensing is unreliable when it gets VERY cold, and I have seen evidence of that, but the repercussion is only that it tries to start and doesn't.