Im running a megasquirt and it is my fir tme wiring any thing substatial ... would some one with experiece mind giving me a hand one day in exchange for some cold beer or a small amont of cash??

 

I'd take a large amount of cash lol. What did you need help with, i'm all the way down in london, but do commute to TO every once in a while.

 

Have you seen my writeup?
http://www.aaroncake.net/rx-7/megasquirt

 

Yes and I have found it very useful and it has helped out huge so thank you for taking the time to write that up..... my situation is ....I bought a used megasuirt with a DIY harness so it is all modified to go I just have to run wires, fuses, relays for the battery, fuel pump, wiring up the coils Im 98% sure I coul manage on my own but would like someone to guie me so I don't screw anything up

 

I'm not sure MS is for you.
Installing it is the easy part. If you need a hand wiring up fuses and relays, your going to have a hell of a time troubleshooting why it wont work... not to mention tuning.

 

Key thing is the Megasquirt setup for an rx7.. I'm planning on installing one in my car i have already done one in a miata where abouts are you?

 

Did you receive documentation with the used 'Squirt as to how it is set up? What version?

 

The previous owner and I have been talking back and forth through email .... and he gave me a diagram to how he set it up ... I added the file

 

So he was running the crank angle sensor with a tooth missing then if he did have it like so. As Aaron also asked , which version of squirt is it?

 

that diagram looks like it was running a 4 cyl not a rotary

 

That's just the standard Megasquirt wiring diagram.

How you connect things externally will depend on how the Megasquirt is set up internally.

 

He has the ignition labeled for a rotary

 

He has the ignition labeled for a rotary

 

the squirt is a V3 board with a MS1 chip in it. The board has the necessary mods in the proto area to run the stock CAS

The wiring harness is a DYI autotune harness, there are no injector connectors however, it was set up to run peak and hold (low impedance) injectors, also has conectors to hook into the stock wiring harness near the ECU on a second gen T2 for power etc. It also has the provisions for the windshield wiper motor and the cruise control,

 

The harness should of been modified to add more shielded cable for the second crank sensor pick up

 

Oops....didn't see the ignition wiring on first glance.

Sounds like the harness is set up fairly well. If it was set up for low impedance, ideally it would have injector resistors as using PWM is a little annoying. Then again, I generally don't bother because ther are only 2 injectors per bank so I just set them up as I would high impedance.

You can get the injector connectors at an auto parts store. Make sure to get the nice WeatherPack style.

You will also need to add a 4 conductor shielded cable to bring the CAS signals back to the board.

 

the previous owner was runing the injectors using PWM i think I am going to as well ....where onthe connector would the shielded cable go

 

Read my writeup. The 4 conductor shielded wire is for the CAS. This is assuming that it is not already on the harness.

I don't suggest running PWM unless the appropriate mods are made to the 'Squirt to bring the 12V for the flyback circuit outside the box. Otherwise you end up with noise issues.

 

you should take a picture of the harness end and send up a pic of that.

 

will do later tonight

 

heres some pics of the harness i added six pics find them here

http://s776.photobucket.com/albums/y...t=DSCN2590.png

 

There are definitely some things I would change about that harness. Pull power and IGN from the battery and either the key, or trailing coil.

There is wiring that I don't see in those pictures:
-fuel pump
-CAS
-coils

 

I've got a feeling that this was possibly run as fuel only, so he had a distributor and no CAS.

The fuel pump shouldn't be a major issue, but the rest you'd need.

I think what you'll need to do is trace the wires that you're not sure what they are with a multimeter and they should all be labeled as what they are anyways.

 

the coils and cas are on the connector but when the previous owner took the harness out he cut the wires so I went back and labled them according to the wiring diagram he gave me

 

Hopefully this works out for you as i just got my Ms2 today