ken
here is the story in short. my tuner was coming down to tune my car but he was saying that he couldnt get it to idle which doesnt make sence cause the car was already running and idle just fine ? he played with the MS and others things to get it to idle again but it only got worse. he gave up about 3 hours later.

two days later i go to look at the car and tried my luck at it to see what i can do to atleast make it run again. sure enough i get the car going again and with a healthy idle. but notice with i datalog the tach map and spark tables on the megalogviewer are all over the place. only things that i have done so far is change the spark plugs and put the ground where it was in the first place which is the battery. i cant seem to figure out why i cant get the pots dialed in .

im using megalogviewer as a way to look at the signal right now. is there another program i can use that is more precise as to real time readings? my tuner is using megatuneix which i have no idea where to get that and cant get my labtop to get on the net in order for me to download anything fo that i can use my labtop....
im so F ing mad right now with it and not sure what else to do ... im almost tempted to set this rx7 on fire . and call it quits.....

 

MegaTune is what you should be using to actually tune the car.

I'm not sure why he would've been using megatunix... Can you remind me.. .are you on ms2 or ms1?

The tuner might've messed with your tables, but it sounds like that tuner wasn't experienced with the megasquirt or something.

I'm assuming you mean the rpm signal is what you're looking at with megalogviewer? Real-time tuning should really be done with megatune. The preciseness of the logs really depends on how often megatune writes to the log.

Ken

 

im using MS1 ver 3.0 with 29y4
modded cas "missing tooth" spark and fuel

he knows the megasquirt pretty well , its just rotary he doesnt quiet know well... so basicly im on my own .
as far as tuning im not to sure on how to go about dialing in the POTS to make the tach signal strenght good enough to be picked up by the MS.
the R52 and R56 pots.
the way that im using the megatune is that i have to record it then wait a second then stop recording then i go to megalogviewer to see if the signal changed any or at all? which in most of my logs the signal is changing so the pots are opperating correctly but they seem to be full of noise.

in my current status the car will run and idle nicely. but when i give her a little gas and she reaches like 2K-3k RPMS she starts to jump around all over the place. then if i move the pots way clockwise she would do the bucking thing around 4K-5K rpms and so on and so forth.

i really need something to see the tach signal ,cause i dont see it happening the way that i am going about it now...

PS: how can i send my logs to you guys to further explain how to make the correct adjustments? not sure how i can at the moment cause the labtop i use cant go on the net and the one im on now is a desktop ...

 

Since I'm the guy initially responsible for the 12-1/cut-the-teeth-off suggestion I have a couple of comments. First, when I suggested it, Ken (muythaibxr, one of the two authors of the MS2-Extra code) thought it was doable (it was) but might be more susceptible to noise (I think it is). I personally have had no problem whatsoever running 12-1 but I have been extremely **** about grounding, routing of cabling, etc. I have noticed that more people have trouble with noise using 12-1 than they do with dual wheel, stock 24+2, CAS. It does require an extra VR circuit but is probably worth the extra trouble.

-Mike

 

ive had it working with the missing tooth setup as well first hand. but then when it came to tuneing with the wideband my tuner required me to have a new ground made for his wide band 02. thats when it went down hill...... so basicly i just reversed everthing that i did before that day and now she is running again . however when it comes to the tach signal im not sure as to how my tuner got the tach signal clean enough for it in the first place.? and i personally dont know how to get them back to where they was before. that is the only thing stopping me right now.
i could ask my tuner for his help on just tuning the POTS again but to me would seem to be a waste of his time just for that .
i do fell as if he is avoiding my phone calls to what reason im not sure =(

 

As far as grounds, etc., are concerned - take an hour of your time and watch http://www.diyautotune.com/videos/me...brucenoise.mov . This is a lecture by Bruce Bowling, one of the MegaSquirt principals. Excellent stuff wherein a very sharp engineer makes these concepts comprehensible to the regular guy...

-Mike

 

i figured out what i need!

any know where i can download a asilascope????

thats what i remembered is he used a scope to see the CAS signal when the fuel pump off and get that car tuned the first time.
so yeah anyone know where i can get ahold of a scope of some sort to see the tach signal/ if not its ok i will limp the car to my collage where i learn how to do this . and they have a scope on hand that i can use at the school =)

 

there are some programs you can get that allow you to use the microphone plug on your computer as an oscilloscope, but i'm not positive where to find them since i dont have direct experience with them

 

Google for "sound card oscilloscope", there's several out there. Be aware that you have to have to build a protection circuit between the probe and your sound input. More than 1 volt or so on the sound card input will fry it....

-Mike

 

The posted link looks to be down at DIY autotune. Is any one else hosting it ?

 

im going to go for the duel VR setup im willing to make the changes to duel vr setup and its worth the money to me. BTW where can i find the writeup for modding the MS for duel VR's?
my MS is the MS1 version 3.0 running 29y4

the only things i think i need is the daughter board? and a new cas uncut haha. anything else i would need?