First drive on MS3 Knock is bad
 

Hello all,
I just took my Miata on its first drive with MS3 running. The drive was going good until I gave it a little gas. Under light acceleration you can easily hear the car knocking bad from inside. I tried pulling a bunch of timing but it didn't seem to help much. I've already verified the timing with a timing light. It was dead on through out the rpm range. My afr's are on the rich side right now so that shouldn't be the problem. The car is stock accept for an AEM X series WB. I got my base maps from the MS extra website. Not sure if i should pull more timing or what?
Thanks

Here, Your timing is far far too aggressive at lower rpm and higher loads.


Highlight the entire blue area and click the button also highlighted in blue. This will smooth the timing from 19* at the bottom left up to the higher rpm/load area. This will be a good start. If it still knocks in that blue area remove a little more timing especially around the top left of the blue area.

https://cimg8.ibsrv.net/gimg/www.mia...44c43f02fc.png


Dann

Thanks dann,
Just highlighting and interpolating the blue area significantly reduced knock. I though base maps were on the safe side but I guess not. I don't currently have any knock detection but I will be making a special headphone amp that can connect to the factory knock sensor. Then I should be able to easily hear if the knock is completely gone hopefully.

The ecu has a knock headphone jack built into it.

Just plug in headphones and tune.

Dann

Are you sure MS3 has a knock headphone jack? I'm positive mine didn't have anything like this although it would be a nice feature. Maybe your thinking of a different ECU?

Here it is on MS2, maybe MS3 omits this due to cost. I assumed it had it also.


https://cimg1.ibsrv.net/gimg/www.mia...76748e86a1.gif

Must only be a ms2 thing. I have the diy ms3 and it doesn't have it.

That timing map is HORRIBLE. Didn't that ECU come with a basemap?

Wherever he got that map, it looks like it was created by a random number generator.

I bought the DIY version of MS so it didn't come with a base map. This is where I got my base tune: MegaSquirtPNP by DIYAutoTune.com I had to pull a TON of timing out of that base tune and that is probably why it looks so weird. I attached a picture of what the map looked like before I changed it. If someone wants to recommend a new spark map that would be great.

I have no idea what you're doing, but I just opened several maps from that very link and none of them are like yours.
Either you're scaling wrong or something. None of them are as terrible as yours or have giant peaks/valleys.

which exact map are you opening?

Which ones did you open? I got it from the 01-05 miata.

that's the only one I didn't open. ok wow that basemap is TERRIBLE. like, seriously

DIY should slap whoever put that up

Just looked at the 99-00, HUGE difference. Now I know why it was knocking so bad. I will be switching over the the 99-00 spark map.

Ho lee chit. Paging Ben.

Paging @Ben

The last time Ben actually opened MT:
So yeah, good luck with that. Matt still logs in from time to time.

Don't want to start shit-talking DIYAutotune as Matt has been very helpful to me, but the website needs some serious updates. As of now it takes a lot of cross-referencing various instructions outside the DIYAutotune site to make sense of installing a DIYPNP, and as noted above, the basemaps leave a lot to be desired all things considered.

Their base map got the car started, I believe that's all they intended it to do. Although I really feel like 90-05 should have fairly similar timing maps.