Tach or No Tach?

I've been installing remote starters for my company for 2 years now and have a question concerning the tach wire. I recently have been installing systems tachless. I havn't had any problems yet. Has anybody had problems with this method. Thanks. Nick

OH yeah...........99% of the time I go TACH (or Injector) on all of the RS we sell......More reliable

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MO

Don't Learn from Others Mistakes
You Might Be the One That Knows.

 I have installed a few different remote start units that required installing tach to an injector wire as the neg coil wire did not work but never tried tachless,

we found that with dei remote starters work just fine espically with chevy trucks,  we have had some with tach that had problems and we went to tachless and now have no problems?? dont know why??? 

Majority off my installs I'll grab tach but on comission it saves time not having to go through the firewall. I guess I shouldn't be so lazy!! Does the module sense running voltage to stop cranking?

yes you have 12 volts and when the alternator kicks in(when the car starts) you have approx. 14 volts and the starter  picks it up.  there may be a fine tune for crank time that you need to program for colder weather. but this is rare   god luck

well, the only thing thats different that i had experience on my car w/ tachless is that if my system is turned up while RS or when i jump start some else's car, the car turn off.

since its voltage-sense, obviously it has to do w/ the e. so if the voltage change drastically, the RS will turn off

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Houston,TX
"The two most common elements in the universe are H+ and stupidity" (Ellison).

why would you have your stereo cranked up?? have not seen or heard of this being a problem.   why would you jump start someone's car with the remote start running, your already outside unless you have remote start jumber cables that do the work for you???   

Interestingly, this was a problem I faced a few months back. I tried everything possible but still my starts were successful on second try so I finally broke down and purchased some extra satellite relays that were recommended by the company that sold my alarm and RS(Omega). When I tried that, the exact same problem continued! I then learnt that my own relays would be just as good as the ones I purchased to connect to the satellite relay ports.

I have been suggested to use the voltage sensing method, however the tach method should be more accurate so I stuck with tach method. Again, interestingly and contrary to what I have been told, on cold days, the car starts on first attempt against what I have been told. Also the car starts on first attempt when cold, and double take to start after I have driven it for a while, which is exactly opposite to what I have been told. To make matters even more interesting (and confusing) these happensings are mostly random, so I cannot pinpoint to any reason why it happens. Bottom line, I heard tach is better than voltage sensing but when you cannot get tach, go with voltage sensing. Just my opinion.

Wow you guys have me all confused. I have been doing this for five or six years now and I have smoke pouring out of my ears from thinking so hard... I am lazy so I go voltage I live in michigan so you know what the weather is like. I use units with adjustable crank time and have no problems. Some cars that crank fast (most gm cars ) often exhibit some over crank but hey a.m.s. (Aint my stuff). That is the wrong attitude to have but I get punished for anything that takes longer than 45min. However on cars like most hondas they crank real slow and voltage works great no matter the weather. Now on my side jobs I always go with a tach. Never overcranks starts first time everytime no ifs and or buts. The only time I do not tach on a side job is if there is no source except an injector. I saw my boss do a car once and grounded out the tach wire going through the firewall. He didn't notice. A few days later this 80 year old lady was walking to the dealership because the injector experienced hydralock and cracked the block. At least that is what the service tech said. I do no know if it is true but I was later told that had it been somewhere else it would not have happened. But I ask this... Had it gone to the pcm and was grounded out wouldn't it blow the pcm? Hmmmmm

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I'm myself don't like voltage sensing. I install car starters everyday and I always use a tach sense. I found that if you don't you will have problems starting when the weather is cold. I always use a tach wire and don't have problems cause of it. Its worth the extra 15 mins to make sure it will always work. Insurance ya know!

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John J. DiStefano Jr.