need some serious help with ms3 pro pnp
 

can you see any COM port in the device manager?

Figure out what USB cable you have. It's likely either an FTDI or Prolific cable. When you figure that out, google "FTDI driver" or "Prolific driver".

If you purchased the USB cable from DIYAutotune or EFIAnalytics, I believe they both have driver downloads on their product pages.

can i send some logs to one of you to se why i'm getting 7mpg's?

Try tuning your fuel.

Pig Rich MS3PNP Pro
 

okay so i installed my megasquirt and installed a new fuel pump. i'm running the 1.6 base tune and i have a narrowband o2. i got about 7 miles to the gallon today driving to and from work and i don't understand why. i could either be running super rich or i have a fuel leak. i'm letting the car cool right now so i can troubleshoot later. i'll post the logs i took this morning to see if any of you guys see anything fishy. for some reason i'm unable to open them in megalog viewer.

So, you don't have a wideband?

no. i don't have a proper bung and this exhaust comes off on friday anyway

I'd try tuning it after Friday, then.

How is your narrowband currently installed into the exhaust? Is it threaded into something that looks suspiciously like a o2 bung?

You have to tune it.

it plugs in and starts as advertised but you need to pay for dyno time also.

Dann

i fixed it. had an o ring leaking on injector 4. she's all good til friday now

/

As long as you don't drive it until Friday.

Base tunes aren't for driving. They are for getting it cranked so you can tune it.

How many threads are you going to start asking the same questions? Which shall I consider the real one?

it's in there, lol. metal clamps and a lot of exhaust sealer

I dont understand, all O2 sensors Ive ever dealt with narrow or wide, had the same thread size. What the hell did you buy?

Washing down your engine with gas, is really really bad for its health. It will be surprising if this car lives until Friday, or much after thAT..

the exhaust i got was very cheap and the bung was too far from the sensor and directly facing the transmission, so i couldn't even extend it and use the bung, so i had to drill a hole closer to the sensor. the tap that i have is too soft for the metal used to make the header so i was left with a big hole in the exhaust. i opted to just use exhaust system sealer (the chalky white one) and metal clamps to secure the o2 sensor in the exhaust. if you read my last few posts in this thread the vehicle wasn't running rich. the o-ring on cylinder 4 got damaged and was leaking so i fixed it and now it's running just fine. it should be just fine until i pull it apart on friday.

that was my mistake. i was kind of in panic mode when i first started so i posted more than once because i didn't understand the issue i had. the car wasn't running rich, it was just leaking fuel.

How do you know it's not running rich?

fuel mileage is back on par with the stock tune. no fuel smell in the exhaust. it's running smooth better than stock. hundreds run ms with narrowband and have no problems. i'll throw a log on here after i leave work today to see if y'all see anything. it's my only option right now cause i have to get to work (shirt drive with low speed limits).

Don't bother posting log without a wideband. Won't be able to tell anything.

Post all of your engine mods and upload a .msq and .msl.

He is not using a wide band O2. says hundreds of people use MS without it.

Hunddddrreeeeddddssssss. Currently. In the year 2018.

https://www.mememaker.net/api/bucket...oh-do-tell.jpg

Maybe he's extraordinarily experienced with these. :rolleyes: I've only been doing this for about 10 years.

The only time I've ever seen stand-alone megasquirt without a wideband was at a race car shop that was very experienced with tuning. Once they had a car completely tuned on the dyno they would remove the oxygen sensor and controller for the actual races.

Can't afford a $150 wideband but must have a turbo, lol. Must have a spare engine and lots of free time.

A narrowband will work to tune stoich cruise.

The USB to serial adapter needs drivers. Can you open up "Device manager" on your laptop and show us a screenshot?

i ordered the mkturbo kit so i have a wideband but i can't install it because the exhaust doesn't have a bung on it. the way my factory o2 is installed i have to keep it as is until i put the turbo stuff onto the car. it's currently metal clamped and exhaust sealed into a hole that i couldn't tap because the metal is harder than the tap that i have, and it's a cheap ebay turbo i got awhile ago. the bung is too far from the factory o2, and the bung directly faces the transmission so even if i were to try to install it it would not work. as it stands i'm running the base tune with the tweaks suggested until friday afternoon when i get off of work, and then i'm going to remove all of the na stuff from the car, install all the turbo stuff (including the exhaust with a properly placed 02 bung and the wideband) and go from there. i figured out what my initial problem was like i stated in the "pig rich" post and have everything i need to make it right after i go on leave from work on friday.

You are trying to turbo your daily driver without backup wheels? That's unadvisable.

omg bro. bro.


please bro.


bro...

yeah, it got messy and stupid so i fixed it the best i could until the good parts go on. i just got back from deployment like 3 weeks ago and i go on leave starting friday so there's been a lot going on with the parts ive been putting on the car plus a bunch of other stuff. i have 3 weeks to iron out any kinks i encounter though so i'll be fine.

Car cuts off after driving
 

hey guys. i don't know why but my car cuts off after driving it for more than a few minutes or so. i dropped off my son at school (about a 7 minute drive) and after accelerating and cruising and all of that i cam to a red light, clutch in, and the car just died. same happened on the way home. can i post a log and tune here to see if y'all catch anything?

This happened to me.

https://www.miataturbo.net/megasquir...traffic-94004/

OP has a NA. It's not shutting off randomly it's shutting off on clutch in.

Tune needs work.

Tune your idle better

this is what i got right now. i tried adding fuel up to 7 but it didn't like it so i went back to 5. last time i drove it it felt pretty ok, but i'm still only getting like 4 psi on a 7psi wastegate

Use closed loop idle and tune it.

Bouncing Idle
 

good morning! so i got my car pretty squared away as far as running and driving is concerned but i still need to rope in my idle. with the help of some very good friends i was able to keep it from oscillating between 1500 and 200 rpm. now it's kind of lightly bouncing between 950 and 1100. can y'all see any changes i need to make from my log and tune to get it to settle down around ~900 like it ought to be? i appreciate the help guys.

edit: i'm going to run another shorter log and attach it. i exceeded the limit by like .48kb