http://www.megamanual.com/ms2/V3assemble.htm

step 50-52 and 54 I really don't know which ignition I should use, I know I need to do the VR **** and I know you have to add another circuit but it says I should do both VR and Hall sensor input. Then select via a jumper but I don't see instructions on how to do this jumper thing.

I guess I just need some straight forward instructions On what to do for my second gen.

 

You want to jumper VRIN to TACHSELECT, the 2 jumper points are near the DB37 connector.

You will also want to jumper TSEL to VROUTINV, IIRC the 2 jumper points are toward the centre of the board.

Forgot to mention, the lables are all on the underside of the board.

 

it doesnt hurt to build both, you already have the parts. what they mean by jumper is to run a stretch of wire between the hole marked VRIN to the hole marked TACHSELECT on the underside of the board. Then, depending on whether you're running the VR signals inverted or not (most of the instructions for wiring our cars use inverted), you run a wire from TSEL to VROUTINV.

 

thanks I didn't know it was inverted. I'll switch that.


I got it working I forgot the 12v pull up resistor jumpers on the jimstim

Thanks so much guys

 

I have high impedance injectors. will it hurt to do step 69 as well as 70 or should I just do 70?

 

install all of the flyback circuits. It cant hurt, and if you ever need larger injectors, many of them only come low-imp so you'll need 70, 71, 72 etc

 

Generally you will want to install all the options onto the board. The ignition input is selected via a jumper so having both won't hurt. You can't stimulate without the optical/coil circuit unless you are using the JimStim.

Always install the flyback stuff.

Also, if you are running the BAC, now is the time to install the uprated transistor and modify the board as appropriate because it is a real pain to switch out components later.

 

I don't need BAC, correct?

I will Install all the flyback stuff.

I do have a JimStim How would I do that simulation?

 

It might be easier if someone could just tell me which steps I need to omit.


It may be a bit to ask but if someone could just delete all the lines we don't need to follow, it would make this a lot easier. It would be very helpful to future RX7 MSers.

Thanks for the continued help.

 

well, if you want more control over the idle, as in for a DD, then you'll want to keep the BAC

 

I don't have the BAC connected on my other RX7 my DD and it idles right around 700 rpms pretty steady. BAC is IAC right?

This car wont be my daily but I don't want to have to have my foot on the gas to keep it running either.

I soldered the 4 jumpers across the board so maybe I'll mess with it.


Im all finished building it. It was a little frustrating at times but quite a bit of fun over all. We'll see if it works this spring.

I still need to build the 2nd VR conditioner. That seems pretty straight forward if I follow that pdf that's floating around.

 

I've found that the BAC is very helpful in cold starts, otherwise the idle from just the throttle stop would vary from 700 to about 1000 depending on coolant temperature, and it can be used to "catch" the idle if it falls due to turning on headlights or using the power windows etc.

 

Thanks to all for your help.

I'm sure I'll have more questions, but for now I'm going to search around here and try to figure out what settings i need.

 

I suggest always using the BAC. It makes cold starts much easier and will maintain a steady idle under various loads. Also it makes tuning the hot start heat-soaked condition a hell of a lot easier as the BAC can open up and prevent the car from stalling.


You'll have to set the JimStim to Denso dual trigger, 24 and 2. How you do that, I don't know because I don't use the JimStim.

On a standard build, I don't omit anything. The only thing I change is to follow the instructions to connect a PWM idle valve instead of the FIDLE relay. This requires a few component changes on the board which are a LOT easier at this stage then later.

I'm currently working on the ultimate 2nd gen Megasquirt FAQ, but it will be a while before it's ready.

 

Just when I thought I was finished. Is this the part in the blue box contained in step 62?


That is going to be so helpful to people in the future.

 

What, sorting through all the different sources and threads here is too much of a rite of passage for megasquirt?

 

Ahhemm, *cough cough* yes! But as Im getting ready to jump on the MS band wagon once I get my TII shoved into my 1st gen, its nice to look at all these threads and see where people have had rough patchs so I know what to look out for.

 

any one have any input on the blue box in step 62? I will be getting my 2nd vr circuit in a few days and would like to get this thing squared away in one shot.

Thanks

 

If you intend to use the BAC, then you need to follow the blue box in step 62.

 

thanks again Aaron