kaboshe

iTrader: (15)

i was street tuning my car the other day, and got it to run 11.1-11.3 afr@wot
i did a datalog and it says that i never even toutched 11' on the whole run.more like 10.6-10.8.

my lc1 gauge is wired to the same wire that goes to my MS on the center plug.

if both are on the same wire, how can i have different reading?i did perform a free air calibration before tuning it. on iddle, cruise and normal driving both are the same,wich seems to be weird.

thanks for your time

Braineack

iTrader: (62)

voltage offset.

kaboshe

iTrader: (15)

and for the frensh-speaking that knows next to nothing to voltage,could you explain?

both the gauge and the ms wouldn't have the same reading because i ''splitted'' the signal?

Braineack

iTrader: (62)

it's the ground wire that's the problem.

kaboshe

iTrader: (15)

ground goes straight from the lc1 module and bolts right up on the valvecover. i also got a suplementary ground on the same bolt going to the firewall

where did i went wrong?

Braineack

iTrader: (62)

does the megasquirt ground at the valve cover and/or firewall?

kaboshe

iTrader: (15)

since it's a PNP, it use the oem grounds. i couldn't say wich one it is ,but i kept all of em.

having 2-3 ground on the same bolt could cause that kind of problem?


thanks a million for the info

Braineack

iTrader: (62)

have the grounds on different bolts is the problem.

Weaver

iTrader: (2)

wow, having the 2 ground in the same place but on different bolts will cause a voltage offset...WHO WOULD HAVE EVER GUESSED THAT!

kaboshe

iTrader: (15)

they are all on the same bolt, on the VC.why this kind of post weaver

Weaver

iTrader: (2)

why not?

triple88a

iTrader: (2)

I've noticed that on my adaptronic also. Gauge says 14 or something, adaptronic says 13.5. (serial to adaptronic, 1 wire to gauge, both gauge and the lc1 are connected to the same + and ground source).

hustler

iTrader: (6)

Electrons, are they positive or negative? Wait, batteries don't store electrons?

Larimer

iTrader: (4)

I've got the same issue and mine is wired into the stock ground. It's 0.7-0.8 off.

hustler

iTrader: (6)

Try mixing E85 and gasoline in the tank until the AFR numbers match.

Larimer

iTrader: (4)

Not sure which to trust now either.

triple88a

iTrader: (2)

Hustler, i'll bring out the crazy white wig and the test tubes at the gas station while i'm at it LIKE A BOSS


When the employee comes out of the **** box and asks what am i doing i'll tell him i'm going back to the future.