Patrick Gabbett

how yas I have a 99 turbo miata with a diypnp. we had it on the dyno today and set the base timing fine. we then noticed as you rev it the car would read (cant remember exact figures now) 10 degrees on car and ten on tuner studio but as revs increased the timing would advance a lot more on tuner studio than it did on the car. anybody have this issue before. thanks

Braineack

iTrader: (62)

Did you tune the Timing Latency?

Patrick Gabbett

ill have to ask him, ill ring him. if the latency was incorrect would it take out a coil as one went on the dyno or is it just pure coincidence?

Braineack

iTrader: (62)

would have nothing to do with a failed coil.

Patrick Gabbett

it says only to tune latency if the timing is retarding. its advancing and advancing pretty bad

Patrick Gabbett

If the cam and crank signals were mixed would that cause this issue

Matt Cramer

If this happens when latency is backed down to zero, I'd suspect the wrong output polarity. If cam and crank signals are swapped, it won't run.

Patrick Gabbett

how do I rectify the wrong output polarity?

Patrick Gabbett

anyone as its at my mappers now in his way and hours from home?

90 Turbo

iTrader: (3)

Can u set it to fixed timing to drive it home and get it out of his way?

DNMakinson

iTrader: (3)

You have said opposite things. First post said car is advancing less than TS. If that is what you mean, then the car is regarding RETARDING vs what MS is telling it to. That does sound like a latency issue.

If TS shows lots of advance, that is because your ignition table is calling for it. Fix that with the timing (ignition) table.

HHammerly

iTrader: (3)

(Edit) Never mind did not read your post carefully and was thinking that you had the same problem I had...


You should look at this thread if you run ls2 truck coils.
https://www.miataturbo.net/megasquir...ing-rpm-86644/

Braineack

iTrader: (62)

next he'll tell us he was actually talking about the fuel table.

Patrick Gabbett

no the timing is still advancing more than even than the table is asking for.

Braineack

iTrader: (62)

But when set to fixed timing at 10, you see 10° with a timing light?

Then when you rev the motor -- still locked at 10° -- it increases?




Pro-tip-of-the-day: Please quote the text youre replying to for content's sake.

Patrick Gabbett

when the timing is locked at 10 degrees we see 10 degrees with a timing light on the car and stays that way when reved.

Patrick Gabbett

yes we have synced the timing and tuned the trigger angle. that's what has us stumped hence why I asked on here. we cant figure it out

Braineack

iTrader: (62)

then how -- exactly -- do you know it's advancing farther than what youre demanding?

Patrick Gabbett

on the gauge cluster it shows the ignition advance gauge, we are referencing that with a timing light on the crank pulley

Braineack

iTrader: (62)

...Even though you just said it stays exactly where you set it?


please leave out as much detail as possible.






Do you understand the confusion?


You just said:

when the timing is locked at 10 degrees we see 10 degrees with a timing light on the car and stays that way when reved.

but continue to state:

the timing is still advancing more than even than the table is asking for.