Randy V

Have you seen these other megasquirt threads:

https://rennlist.com/forums/928-foru...uirt-long.html

https://rennlist.com/forums/924-931-...our-944-a.html

Ducman82

Ya, they are wee little connections.. :-) looking fun!

BigAl1

Thanks Randy - I knew Colin's thread from before, but the 944 thread is new to me - good read there.

BigAl1

It's working! After several hours of assembly - I got to the first stage of testing, and found no 5V on the board, so hacked around on that problem for a while last night and early this morning. Finally, took it to a shop in London, and the owner there gave me some tips, and things to look for. I bought a 10X jewelers loupe, and carefully looked at every solder joint on the board - found a few to reflow, and a few with not enough solder. With that done - got the continuity from pin 28 to the U5 power transistor, and with the JimStim, got the 5V on the board like the instructions say! Success!! Finished the assembly this evening, and ready to go into the case now, then connect to a computer to upload the firmware. Tomorrow....

Ducman82

Excellent!!!!

Fronkenstein

Hey BigAL1 - awesome! I still have all those great parts you made for me for the megasquirt. I am CIS still, but I still intend on doing this build someday. Probably on my next 928

BigAl1

Been plodding along on the MS3 setup guide, and all is going pretty well. Just finished all sensor calibrations, and verified all injectors are working (a couple quiet ones right now I hope get louder with fuel to lube them), and all coils are working. Next is verify the IAC valve is working and correct polarity, check my fan control is setup correctly, then check Crank/Cam signals and timing. Hopefully next week will be first start!

Fronkenstein

Hey that is awesome news! I still have all that great stuff you cut for me. I hope to build my setup over the next winter. My intent is to get this m22 engine dialed in with CIS system, get her interior straight and give her a coat of paint over the anger and winter. You're an inspiration! Keep us posted.

Fronkenstein

BigAl1

Thanks for the push, Frankenstein. So far the MS3X bracket stuff is working well, so hopefully when you get to that stage, mine will have been running for a while, and the reliability will be proven (Ducman's is going strong). Got some more steps done tonight, to where I'm logging the Crank/Cam signals. Something is off though - getting the double tooth showing on the tooth logger and no RPM reading, so working on setting the position sensor gaps to 0.039". I found the crank was less than 0.020"! Cam sensor gap was very close, so will make a couple different spacer shims at work tomorrow to dial that in too. I already have the 10K resistors in the signal wires back to the MS3X box.
It seems I finally got oil pressure on the gauge, but it doesn't make sense. Once the cranking starts, the gauge pegs at 5, and stays there until 5-10 seconds after cranking is stopped and the key is removed, then the gauge falls to 0 with a slight "tink" sound. From a search, I need to check the pod connections, pod GNDs, and look at my wiring for the sensor. I deleted the 14 pin connector in the engine bay, so not that problem anymore, but something in there is wonky.

BigAl1

Got some problems solved tonight - the oil pressure gauge was going full "5", then dropping only after the key was off, so Ducman clued me in - the 2 wires on the sender were reversed. Works now, shows oil pressure nicely building to ~4 during cranking. Also dialed in my Crank and Cam sensors to 0.036-0.040" gap, changed my crank to Rising Edge, and my tooth logs look great now - 1 single spike line for the missing tooth - clean! The Cam log is a very sharp line, and no red sync loss hints. I show a steady 200RPM on the TunerStudio gauge, and all other sensor gauges show logical readings. Now to do some buttoning up, tighten suspension hardware, finish filling the trans fluid, and get ready for initial timing light check - I'll get a timing light this weekend.

Ducman82

Excellent news!

matt_o_70

subscribed - great resource

Ducman82

He cheated. He has my tune as a base map.... Lol.

BigAl1

And big thanks to Jake for that. Should be a great help in getting running smoothly.

jinmcvb

Awesome. Keep us posted on the final steps and the wiring and of course the tuning. I think most do not understand how much head scratching is involved with putting these things together.