getting stock ae86 tacho to work with coilpacks/aftermarket ecu

[b1gb3n]

like the tittle says im going to attempt this ve got the required resistors but they are 1W instead of 1/4W. does it make a difference or do i have to go change it back?



edit : ok this actually works!! u need to make sure ur original tacho is getting a reading for the rpm signal from ur coil/ecu. just drag the reading wire and connect it to the ignition coil slot on ur cluster. slot 16 in the diagram below.





additional info http://www.toymods.org.au/forums/tech-conversions/6355-tacho-tech.html


hought ill add this to ae86 DC as well. might wanna move it to tech articles?

[LEVIN86]

I got this problem as well, I'm running coil packs and an aftermarket ECU and my stock tacho ain't working. But it funny coz my REVS bounce when I indicate, wipers or have heater/aircon on...

Let me know how u go with yours and if it's successful good luck

[b1gb3n]

if u wanna read more theres this thread ve got a pivot tacho in the car that goes to 10k rpm, but somehow the needle wouldnt travel as much as the stock tacho. if u got a high revving NA car u gotta see the rpm needle dance around

[Skylar]

As long as the power rating is greater than required, it'll be fine electrically. The 1W may be bigger than a 1/4W and might not fit in the required spot.

[b1gb3n]

it fits, just doesnt go all the way down lol

[dtour]

Nevermind re read op I was way off

[b1gb3n]

ok i did the thing in the first post and nothing is happening.

been looking at ae86 manual with 4age



since my sprinter originally had a 4ac, do i have to drag the tacho reading and stick it in slot 16 for the rpm signal?

currently running microtech ltx 8 with bosch coilpacks.

[Hen may possibly be a nut]

If you're running individual coils, you can join the coil negative signal from all four through diodes and connect this to the factory tacho wire. A wiring diagram for this should be in the tacho tech thread linked above.

Or alternatively you could make build a tacho convertor. This take the tacho output from the Microtech and coverts it to what the dash needs.

[b1gb3n]

i had an aftermarket tacho already fitted in the car. i ran the signal wire into the ignition slot (16) on the cluster thing and it works now!!


thanks ben/hen all sorted. u still welding for beers these days??

[Hen may possibly be a nut]

Sure do. Though if you have a job it may pay to check my location first.