megasquirt write-up for w201 - bounty

[The Benz Master]

heee... well you need to connect the MegaSquirt to Megatune for it to make changes.... not sure how you can tune/test anything without connecting them together

you might have to save your file once you made modifications to it and have to re-open it to get your "tuned" data back....

[Shisamo]

I did connect the MS to computer ...and using the Megatune do the setting . And I did save it .and reopen the megatune . The setting still is the default setting one ...

So you mean save is burn to ECU or just normal MT file saving .
Re-open ... you mean reboot the ECU or just reopen the MT ?

So in your sistuation. You just do the parts install and wiring job first and then do the setting in the car or you pre-setting the ECU already and then install it to the car??


Thanks alot Benz master

[matsalleh76]

Samo,

"Burn to ECU" is the way.

Please re-read the manual,.........then re-read it again.........its all in there.

bobf.

[Shisamo]

So when I burn the setting to the ECU . Will I burn something else setting to the ECU in the same time.

But the coolant temp. sensor resistance section only have OK and close two choice . How can I burn it to ECU ?



I did read it few time . It did talk about this part that much

Thanks alot

[The Benz Master]

then you might have a wrong configuration for your com port or something like this... re-read the manual...

it's a lot of learning to do at once but it will eventualy pay off when it works :)

Yes, i personaly hard wired everything before doing any programming. I dont have the Stimulator so i directly use the car to do the testing. But i've got a rather unique appartment that allows me to do this... it's a 4000 Sq foot warehouse where we store cars for winter and where i got some tools to work on my projects and my motorcycle, etc

Well, i actualy mooved but my dad ownes the warehouse so i still go there on week-ends to have fun

[Shisamo]

About the com port, I sure it have no any connection problem. Because In megatune 2.25p1 version. It have com port connetion test. It is succes.

Emmm....

I think I just do all the installation job first. And then plug it to the car and do the setting.....

The Benz Master.
Can I ask few question? About the trigger input. You using the coil to get a signal or using crank trigger input ? Or you just doing the fuel only now ?
And about the injectors connection.
Injector have 4 port to connect ( Pin 32/33 and 34/35) So for connection. Is it mean 1 injector per each pin? or connect two injector in one wire and then seperate the other edge become two to connect the two pins of Inj 1 or INj2 ( 2 per each)?( hopefully you know what Im asking)

Can you teach me which way you connect your injectors?


Thanks alot

[The Benz Master]

Woohoo !!! i got to ride the 16v with MS on sunday !!

Incredible... once i got the engine to fire up, it was'nt verry long before it ran fairly well and well enough to do a test ride. I did'nt drive this car since 1.5 year cuz of crappy OEM injection. Full throttle tuning is way off right now so i cant say for power improvements but low end is verry good and sound trough the intake is about twice as loud as it was.

I have a laser cut 36-1 + hall sensor trigger wheel between the belt pulley and the damper on the front of the crankshaft. I have several of these so i can supply if you need one. Very inexpensive too. So i control ignition with the megasquirt trough the stock coil and distributor for now (needs a MSD to drive the stock coil or just swap for a std coil drived directly with the Megasquirt)

for the injectors, i connected them exactly like this diagram : the two pins in one wire and again separated to two injectors. but you could connect 1 wire per injector... just makes 2 more wires to route trough the harness. Injector bank one on cylinder 1 and 4 and bank two on cylinder 2 and 3 (just like GM did on the cavalier).

[Shisamo]

The benz master.

congratualtions. About the 36-1 trigger wheel between the pully and damper. One question come up from my mind. Isnt it the offset of the pulley will getting change ? And all the pulley wont line up in the same right isnt it?

So where you mount your hall sensor ? If I not remember wrong . I read the MS forum about the sensor need to be some angle in between TDC and missing tooth.

Thanks alot

[chrisfball12]

post some pictures!!!!

[george3soccer]

Near the crank wheel is a Variable-Reluctance (VR) sensor - this sensor produces a bipolar signal. The VR sensor is pointed at the center of the crank wheel, with a 0.030 to 0.060 inch gap (0.75 mm to 1.5 mm) to the crank wheel teeth.

The VR sensor and 36-1 crank trigger wheel must be set in the correct relationship to each other. With the engine at TDC for cylinder #1, this relationship is:

* EDIS-4: missing tooth is exactly nine teeth (90°) ahead of the VR sensor,

from the megamanual...

[Shisamo]

The benz master ...

If you have some extra it is nice too. I may be will get one from you. But will the thickness of the trigger wheel will change the offset of the pulley ?
what is the size of the wheel ??? Are you using GT101 hall sensor ?
Actually if you have a pic post up about how you mount your Hall sensor and trigger wheel is nice too


Geroge3soccer

Thanks for the information. I just reread the Mega manual again . Im not really pay any attention about EDIS before, because I may go to do use two M6 to do the trigger. But now after I heard the bez master have some extra. I may go to use the 36-1 setting ...

But now ...I dun't how to set the sparking trigger setting in megatune.....

[The Benz Master]

Originally Posted by Shisamo

The benz master.

congratualtions. About the 36-1 trigger wheel between the pully and damper. One question come up from my mind. Isnt it the offset of the pulley will getting change ? And all the pulley wont line up in the same right isnt it?

So where you mount your hall sensor ? If I not remember wrong . I read the MS forum about the sensor need to be some angle in between TDC and missing tooth.

Thanks alot

i had the damper machined... i removed the same thickness than the trigger wheel (.075") so everything lines up like it did before. It's a 20 minutes job at any machine shop... not expensive to get done. The size of the wheel is about 5.5" (just a bit smaller than the damper)

The sensor is bolted trough the hole where the stock sensor was. It's the missing tooth that is offset from TDC.

The hall sensor used is a OHB900 from digikey... rated for 200khz (about 10 times more than what we need) and it's only 7.35$... it's hard to beat that
digikey page

Pictures to come, i wont be seeing my baby this week end :( but today i found myself a cheap (100$) laptop to beguin the real tuning

i still need to find myself a timing light to see if everything lines up like it should but it starts and runs and datalogings dont show any signs of trigger missing... at least up to 7600 RPM

Oh and the trigger wheels i had Laser cut have all 36 tooths so you just cut the one you need to for your given application.

[Shisamo]

I need to find a cheap laptop for the tuning too...I just find out using desktop is impossible to do the tuning job ....hahaha ...but Im afraid to using the USB to connet the MS . Because most of the people fail to using USB...

Em.....so do your trigger wheel drilled the mounting hole already or not ? And about you mounting your sensor...did you pull the whole engine out to do it ? It is kind of hard to remove the stock knock sensor when the engine still in the car


Thanks alot The benz master

[george3soccer]

I am using the usb to db7 conversion cable for this project. i configured it with my laptop, and have fully finished the assembly of MS, with the full testings of it along the way.

I purchased it from best buy, and it was rather cheap, since it was a open item.