Oh ok. I'm @ work with no MS software on this computer.

Anyone post a screen shot of the table? I'm stuck here till 4am.

mike add a .1uF cap on js8 and GND.

here was my timing table:

http://www.boostedmiata.com/timing/newtiming1.jpg

I've gone as high as this:

http://www.boostedmiata.com/timing/diytiming.jpg

"mike add a .1uF cap on js8 and GND"

Ok. Whats it going to solve?

anyone have any guesses?

I have roughly that same issue but it's between 3500 and 4200 where I get rich spikes even though the fuel table is smooth...

I'll check spark gap first to see if that helps... but I get scared when you guys start getting all electrical on me. WTF does .1uF mean? I guess just tell me I can get one at Radio Shack.

PLEASE LISTEN TO SCOTT and add the cap!!!!

It filters/smooths out the tach signal AND IT WILL WORK. It took the inventors of MS to figure this out (Per Jerry@ Autotune).

BTDT...

Last pic in post 2 shows where and how.
https://www.miataturbo.net/forum/showthread.php?t=13676

yes you can. i just picked up a pack of 5 for like $2

is this "adding a cap" thing also valid for mspnp models?

yup,if not done by DIY already. my august version of the 94/95pnp didn't have it yet. i never had any hiccups but i added it when going to HiRes

IIRC: You have have to check w/ DIY on that one, This hiccup didn't come to light til they were working on the 96/97 mspnp, I doubt earlier versions have it and it's not consistent between cars.

Piece of cake fuckers... add this to my weekend list of Miata shit.

1. Pull Valve Cover.
2. JBWeld nuts for COP holdowns.
3. Clean, sand, paint Valve Cover.
4. Gap plugs
5. Add J8 resistor.
6. Install COP's, test (maybe adjust cranking pulse-width).
7. Clean intercooler and hit it with some flat black.
8. Fab up seatback mounting bracket for uber-seat (seat currently held in by twine).
9. Seriously consider new timing map.
10. Finally get down to LongShots and have a beer.

You forgot build DET can to help w/ your timing tune ;)

What's a DET can?

OH yah, and I need to do the research on a CATCH CAN since a "guy" I know swears I'm burning oil even though I'm not.

http://i29.tinypic.com/10mn9eq.jpg

http://www.boostedmiata.com/MS/1uf_cap.jpg

http://www.radioshack.com/product/in...entPage=search

Fixed

My car needs it. Has a random misfire event that tends to occur when at high speed cruise (70-85mph). Some days, it won't happen. Other days, it'll do it 3-5 times. Hoping that this cap clears it up. As soon as I get my MB back (again) I'll be doing this.

My 1990 suffered from this missfire as well so it's not just the later models. I fitted the thingy widget to my MSPNP and it cured it completely.

I am so stoked to find out about this... I had no fucking clue what was causing this thing... just a random-no-reason rich spikes betweem 3500-4200rpm that nothing would fix. I'll be sure to post results.

Sorry all. I know you told me of the cap before but when you said it would fix the "tach signal" I just thought it would solve the tach on the dash jumping at that RPM and I knew there was a seat of the pants miss too. So I though the dyno would show that it was a power loss problem not just a tach issue. Again sorry.

NOW BACK THE ORIGINAL PROBLEM!!!!

Where The F**CK is My 50 other horsepower????

what was your AFR? your fuel map looks hella rich.

it's quite possible that the loaded dyno had heavy corrections on it....I betcha if you go back to the original dyno you'll have more power.

I though AF looked good :dunno: