MSefi.com read only forum (Jan.15,2018)

Thanks for the feedback guys. As soon as I get my latest project out of the shop bay, I'll spend some more time on getting the truck running, and hopefully get some better data logs.

Shawn

Hello and welcome to the MS world..

I'm by no means an expert, but I have a few questions.
1. What OS are you using to run Tuner Studio? (Win,Mac, Linux)
2. Is this on a desktop system, or laptop
3. What kind of serial port are you using (built in 9 pin, or USB converter)

The reason I ask this is ...

Sorry, the previous post should say 4.99v.

Thanks

Ok, I've removed C13,C14 and R19 since the smoke was coming from that little area, (And also U5 is removed) and re-ran the tests:

Power supply is 12v wall wart outputting 12.42v at no load

12v side

S12, - 10.46v
S12C, - 9.8v
The center legs of:
Q9 - 10.46v
Q12 - 10.46v
The left (non-banded) end ...

Matt,
After de-soldering U5, upon power-up I get smoke from what appears to be C13, C14, R19 area(C14 gets super hot) . I didn't do any of the voltage checks beyond that for fear of burning up even more stuff. Or should I just let it burn up and troubleshoot from there.

Thanks

Shawn

Hey Matt,
Thanks for the reply. All the 12v points spike to about 3v, then drop down to about .8v and no 5v at all. Here's the results:

12v side

S12, - .83v
S12C, - 1.4v and falling
The center legs of:
Q9 - .8v
Q12 - .8v
The left (non-banded) end of D3 - .8v
The left leg of U5 - 1.4v and falling ...

Hello all,
I'm deep into my learning curve on my GM TBI install on my '67 Chevy inline 250. I purchased the MS II as a kit along with the JimStim, and the assembly went along without a hitch, despite this being my first time building anything this involved.
I have all my hardware and wiring ...