m0ss4yy Posted November 29, 2009 Share Posted November 29, 2009 what does wiring it to the negative on the coil do? does it just give off a voltage which the calibration of the tacho converts or something similar? because i had one a while ago and it kept flickering up and down a bit.. may have been a shit gauge but there may be another reason? Quote Link to comment Share on other sites More sharing options...
tortron Posted November 29, 2009 Share Posted November 29, 2009 its measuring the pulses going to the distributor it converts these to 4's,6's or 8's (cylinders in the engine) to find how many revolutions are occuring Quote Link to comment Share on other sites More sharing options...
m0ss4yy Posted November 29, 2009 Author Share Posted November 29, 2009 so if mine was flickering up sometimes, does that mean my condensor or something was a bit shotty? Quote Link to comment Share on other sites More sharing options...
bubblegoose Posted November 29, 2009 Share Posted November 29, 2009 shit connections, solder that shit and youll be sweet if its a 5" monster nacho ill stab you Quote Link to comment Share on other sites More sharing options...
m0ss4yy Posted November 29, 2009 Author Share Posted November 29, 2009 ahaha, it WAS (cause it was free).. now its a smaller one that i got from trademe $1reserve lol.. so just solder it to the coil Neg and it'll be sweet? Quote Link to comment Share on other sites More sharing options...
d.p.n.s Posted November 29, 2009 Share Posted November 29, 2009 if its a 5" monster nacho ill stab you lol i hate those fucking things Quote Link to comment Share on other sites More sharing options...
m0ss4yy Posted November 29, 2009 Author Share Posted November 29, 2009 shit connections, solder that shit and youll be sweetif its a 5" monster nacho ill stab you im not a fan of them either but if I ever get something free.. i use it as much as i can lol.. Quote Link to comment Share on other sites More sharing options...
tortron Posted November 29, 2009 Share Posted November 29, 2009 *waiting for someone to come call my bullshit on how a tacho works shhhh but yea try dodgy connections first should screw on to the negative ? Quote Link to comment Share on other sites More sharing options...
m0ss4yy Posted November 29, 2009 Author Share Posted November 29, 2009 *waiting for someone to come call my bullshit on how a tacho worksshhhh but yea try dodgy connections first should screw on to the negative ? i wired it all myself and shit and the coil connection poles are pretty dirty (old build up of some crap).. whats the best for cleaning it hardout? then ill solder the wire and see what happens.. Quote Link to comment Share on other sites More sharing options...
tortron Posted November 29, 2009 Share Posted November 29, 2009 sounds legit. i have a ring type connection which is soldered to the taco wire. This is then bolted onto the negative Quote Link to comment Share on other sites More sharing options...
m0ss4yy Posted November 29, 2009 Author Share Posted November 29, 2009 hmm.. mine: wire comes straight out of the tacho, joined onto another wire with a connector thingy.. then that wire has a female blade on the end, which goes onto the male blade on the neg of the coil Quote Link to comment Share on other sites More sharing options...
tortron Posted November 29, 2009 Share Posted November 29, 2009 oh yea that sounds right check the connectors if you are real worried, get a multimeter on there and check it out Quote Link to comment Share on other sites More sharing options...
m0ss4yy Posted November 29, 2009 Author Share Posted November 29, 2009 il clean it all and make sure the connections are tighter than a monkeys asshole if that fails, then multimeter it is.. if that fails then so do i.. = commit. Quote Link to comment Share on other sites More sharing options...
anhonyb Posted November 29, 2009 Share Posted November 29, 2009 ahaha, it WAS (cause it was free).. now its a smaller one that i got from trademe $1reserve lol..so just solder it to the coil Neg and it'll be sweet? you owe me 20 buks for that tacho you egg Quote Link to comment Share on other sites More sharing options...
m0ss4yy Posted November 29, 2009 Author Share Posted November 29, 2009 nah that was wiped after ...THAT day Quote Link to comment Share on other sites More sharing options...
Ned Posted November 29, 2009 Share Posted November 29, 2009 Tacho has ground on it normally but spikes up to 12V when a spark happens. This part has got some high voltage shit going down though so can peak up into hundreds of volts so be carefull what you connect to this. for example, most scopes will be very upset if you connect it to just about anything in the car. Cars are the devil and you can find massive spikes both positive and negative. Quote Link to comment Share on other sites More sharing options...
m0ss4yy Posted November 29, 2009 Author Share Posted November 29, 2009 yeah it has a ground wire, a coil wire, a power wire and a lighting wire Quote Link to comment Share on other sites More sharing options...
m0ss4yy Posted November 29, 2009 Author Share Posted November 29, 2009 what is the problem in wiring stuff to the battery negative when it says engine ground? is there a difference? Quote Link to comment Share on other sites More sharing options...
forced Posted November 29, 2009 Share Posted November 29, 2009 It's the same. If you've got an ignition problem then it can cause the tach needle to jump. You'll know of course because it will misfire at the same time. If it's running properly and the needle jumps then it's probably just bad connections in the tach, as mentioned above. Steve Quote Link to comment Share on other sites More sharing options...
Ned Posted November 29, 2009 Share Posted November 29, 2009 you will get a better result with engine earth as engine and battery can differ in voltage. They aren't supposed to really but as i said earlier, car electrics are nasty things. The ignition is in reference to the engine earth so i suggest using the engine earth. The closest to the dizzy, the better Quote Link to comment Share on other sites More sharing options...
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