Reverant

iTrader: (10)

I got it to run today after several attempts at the input circuit. Like I said in a previous post, I used an LM339 instead of TL082, which worked just the same. I'm using all the stock sensors (Crank, Cam, TPS, IAT, CLT, Knock) minus the MAF (GM 1 bar) and baro (also GM 1 bar). It started on the first try, and idled around 900rpm (I'm currently NOT using the PWM valve) and pretty lean at 16.5:1. I managed to copy all my settings from my MS1 (priming, cranking, afterstart, warmup, accel/decel, VE, IGN, AFR, etc) so it pretty much just worked. Too bad it stalled just after I parked after a trip around the block because the battery died or I would have started tuning right away. Aparrently the NAPA voltage regulator is either not wired correctly or is not working - I will have to check it out or use Jason's circuit.

All in all, a spledid day I must say!

Jim

patsmx5

iTrader: (16)

Sounds good. Now post every picture you have of your car. Your signature makes me drool.

18psi

iTrader: (76)

can you post up a list of everything you ordered from diy autotune and whereever else to get this to work?

I'm sorry, but I am about to attempt to make a ms2 for my 2000, and this would really help. thanx

Reverant

iTrader: (10)

I'll write a detailed "howto" once everything is up and running normally.

Jim

timk

Hi Jim,

Glad to hear you got things running with MS2, looking forward to the guide.

Cheers

ZX-Tex

iTrader: (15)

I'm curious. What are you using for your 5 Hz GPS?

Reverant

iTrader: (10)

The 5H GPS is an OEM-intended module that I bought real cheap (like $40) from a friend. I had to build the power supply circuit (3.3V) and serial ports (it has two USARTs so I had to use a MAX232N to bring the TTL level lines to RS232 levels).

Jim

richyvrlimited

iTrader: (1)

Great job Jim, look forward to pics and stuff, your original MSinstall ,(along with Aussie Driver) was my inspiration to go MS all those years ago!

akaryrye

iTrader: (5)

Any updates? The write-up idea sounds good, bva MSII sticky is something we could really use here. I am looking into upgrading to MSII on my 97 right now, and was thinking that If I did it, I would want to do a write-up on the upgrade from MSI to MSII for NA cars.

Reverant

iTrader: (10)

I'm still trying to resolve the alternator issue. The NAPA regulator didn't work for me, neither did Jason's circuit. I'll build one using the microcontroller board I use for the battery light circuit (different than the one Jason suggested).

Jim

y8s

iTrader: (8)

That's strange. Jason's circuit should drop right in and work well. What problem are you having with it?

Reverant

iTrader: (10)

It simply doesn't work. The output is not PWM, just a constant voltage level (IIRC 2.5V, the same as the TL431 ref voltage). Naturally, the output voltage sticks to 11.5V. I've gone through the built circuit a hundred times, to no result.

Jim

WestfieldMX5

I've just finished building this circuit as well. Is there a way to test this it?
Should a variable voltage on the input (say 10 to 14.5V) give a variable voltage on the output? How much should I measure?
The car is still in the UK, so I can only test it on the bench right now.