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virtual tach reliability?

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=110596
Printed Date: August 18, 2022 at 6:23 AM


Topic: virtual tach reliability?

Posted By: Kwazyace
Subject: virtual tach reliability?
Date Posted: January 12, 2009 at 5:09 PM

Just completed an Avital 4113 remote start install on a 2006 F150. I ran the tach wire, however the system powered right up on the first try with the default setting of Virtual Tach. I have since started it successfully about 6 times with no issues at all- no over-cranking or stalling. Let it run for 10 minutes with no shutdown and it is quite cold here today. Before returning it to the customer, I was wondering what you all thought about leaving it on Virtual Tach? Just nervous about the dreaded follow up phone call with issues. Thanks



Replies:

Posted By: cobrar980
Date Posted: January 12, 2009 at 7:42 PM
I only do it as a last resort. I always use the non-common injector wire.

I've had a car here and there not start by using virtual tach....so just stick with the injector wire. It's not hard to do. Using virt tach is just lazy in my opinion.




Posted By: robertsc
Date Posted: January 12, 2009 at 8:02 PM

i agree tach is the only way to go

all the installs i have let go out the door that i havn't done tach have came back





Posted By: TooDark
Date Posted: January 12, 2009 at 8:14 PM
Injector wire ALWAYS




Posted By: way2qk4u2c
Date Posted: January 12, 2009 at 8:21 PM

a 2006 F150 huh? can you post the wiring diagram you used for it.

I have to install one in a 2006 F150 FX4 Supercrew





Posted By: dtk1
Date Posted: January 12, 2009 at 8:41 PM
its not that bad to be honest I would never do a tach in new GM because its a waste of time never had a problem with GM however on fords its a must and even with the tach theres still one or two that give me issues I try to do tach as much as i can lets not forget the car that the boss takes 2 hours before we close and you still have to finish the car your working on that leaves you with only one hour to do a RS posted_image




Posted By: cobrar980
Date Posted: January 12, 2009 at 10:59 PM
dtk1] wrote:

its not that bad to be honest I would never do a tach in new GM because its a waste of time never had a problem with GM however on fords its a must and even with the tach theres still one or two that give me issues I try to do tach as much as i can lets not forget the car that the boss takes 2 hours before we close and you still have to finish the car your working on that leaves you with only one hour to do a RS posted_image


That is true, on some newer GM's, as soon as the car see's ignition and accessory powered, it automatically powers the starter. So with that, you don't even have to connect starter or tach.....technically.




Posted By: loneranger
Date Posted: January 13, 2009 at 3:57 AM

cobrar980 wrote:

That is true, on some newer GM's, as soon as the car see's ignition and accessory powered, it automatically powers the starter. So with that, you don't even have to connect starter or tach.....technically.

How does the R/S handle this, when the vehicle fails to start properly? More over, how does the vehicle handle this, when it fails to start properly?



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Ideal - cmon dude, add to topics in a useful manner, not stuff that is obvious.
Story - Phzzzt! Hey, what happened?! ... Isn't it obvious?
Moral - Never dismiss the obvious.




Posted By: Chris Luongo
Date Posted: January 13, 2009 at 7:03 AM
loneranger,

There's a good post on here somewhere, from a year or to ago......search for something like "tach vs. voltage sense vs. crank time."

For the record, I've had DEI's virtual tach in my 5.7-liter, 112,000 mile, '96 Roadmaster wagon and it works great. I would imagine it would be even better in newer cars.

I also have Audiovox's "crank averaging" voltage sensing system in my 147,000-mile, 3.8 liter '96 Camaro, which also works well.

We've had temps down to the teens here in New Engand, too.

All the manufacturers seem to be improving their tachless technologies all the time.




Posted By: chev104275
Date Posted: January 13, 2009 at 7:39 AM
ive had very good luck with the virtual tach   ive done a bunch of Kias , Suzukis and some trailblazers with it and no problems so far its gone down to the single digits here in mass

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If i Can't Install it    I Don't need it   Joe




Posted By: kgerry
Date Posted: January 13, 2009 at 11:18 AM
i prefer to use a good valid tach source whereever possible, but i find the new DEI units are erratic on learning tach... some just wont learn an injector or tach source for some reason so we use "virtual tach" and i have yet to have one come back to me with problems....

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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer

Owner/Installer
Classic Car Audio
since 1979




Posted By: jmsounds
Date Posted: January 13, 2009 at 11:51 AM
i had the same problem with some ford crown vics and expedition the injectors don't work the cars that i done are on 98  to 2002 that i had problems with so i just do voltage sensing and never had any come backs with this type they start the first time  some dei and other alarms don't detect this type of voltage because is not ac they used 12 bolts pulses




Posted By: thepencil
Date Posted: January 14, 2009 at 9:38 AM
"virtual tach reliability?"

Of course NOT. It's a bit of work to hook up the tach wire, but you will sleep better. I have not done an install without hooking up the tach wire. Here is my logic. If the engineer behind these remote starter unit has enough confidence to say the technology behind the virtual tach is reliable, they would have remove the tach wire design off the remote starter unit. Until they do, I would make the tach wire connection for a piece of mind.


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




Posted By: kassdog
Date Posted: January 14, 2009 at 12:03 PM
I tried the "virtual tach" for a couple cars and had nothign but problems. Like just crank the first go and then not start but then would start on the second go around. In my eyes that is not a working r/s so its nothing but real tach for me. I actually think I might trust voltage more than virtual tach.




Posted By: ben d.
Date Posted: January 14, 2009 at 2:04 PM
Just did a remote start in an 06 ford escape and i'm glad i ran tach on that.  let it sit out overnigth and the difference in crank time was huge.. i doubt virtual tach would have compensated but i'll tell you that crank time wouldn't have been right lol.

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2008 Dodge Ram 1500
MECP Certified Advanced Installer CEA 191700




Posted By: brhaugen
Date Posted: January 14, 2009 at 6:09 PM
I do tach exclusively, when temps get down to -20, I just don't trust virtual tach.

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Brent Haugen
Fargo, ND




Posted By: 32valvefox
Date Posted: January 15, 2009 at 10:36 AM
supposedly the virtual tach was engineered in canada where it is not uncommon to get temps -20.  Although i still religiously use a tach wire!  ive got a 5101 in a 06 corolla coming back tomorrow for no strarts.  i think im finally going to try virtual tach and see how it goes.posted_image





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