shift light wiring on 4agze loom

[reecegze]

hey people , Where do you take the signal from a on a 4agze loom/setup. Tacho is out by 1000pm with tacho modifcation according to aftermarket ecu. Do i just take the neg - on one side of the 1x coil pack or do i take it from the ems stinger output.

[reecegze]

anyone got some insight on the best way to do this , not wonting to fock the ecu loom

[ke70dave]

id say use the ems stinger output?

what is the form of the output that ems gives? positive pulse or negative or what?

you want a negative pulse for tacho.

[reecegze]

yer reason for wanting to no where to take the -neg signal on the 4agze setup. Do Is i take it at the coil packs or cas or ignitor. Thats all i needa no.

[Skylar]

I was going to help earlier but I don't even understand the question you're asking. I was hoping you'd post more information about what you're trying to do before I did try to help but you haven't.

Are you trying to drive the stock tach. or some aftermarket thing w/ a shift light like the thread title suggests? If so, which one?

[reecegze]

He mate it's an aftermarket shift ligh with ditgital rpm display so it's a/m. I just need no where to take the signal wire from the 4agze dli/cas version. So I can accurately shift before 8200 cheers

[ke70dave]

you still confuse me...

so is the car running? with an EMS aftermarket ecu?

if so why not just use the output on the EMS to run your funky tacho?

[Skylar]

Yeah, run the tach. output from EMS to tachometric thing. If it doesn't have one I'm sure you can make a spare output into a tach. out.

[Adsport]

You will need to use or configure an output from your EMS comnputer to drive the tacho. Having an aftermarket ECU you wont have a standard DLI igniter (because they are smart igniters and aftermarket ECU's cant control them) so trying to do it off standard wiring won't help your case.