MS3 Pro Sequential Injection + Coil near plug conversion thread

67Dart273 said
One thing I noticed is your temp sender on that tee. That might not be a good idea. Let's say you get a slow coolant leak over night, like a weeping water pump. The coolant level might drop enough the gauge won't pick it up rapidly. You want the main gauge sender "where you'' can see it

(the GM "in the head" thing is a much better idea)

There are various places, makes spacers under the T stat housing, might be one approach.

If nothing else, interchange the EFI and the gauge senders

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Also "I wasn't thinking." Is the injector drivers different for the MSII and III? That is would you need the outboard driver module if you was to have used an MSII?

Typically when you get air pockets you get a "false high" reading with a jumpy needle, been through this with several cars where you have the engine temp sensor above the top of the radiator (my 1994 Cutlass Supreme 3.1L that I used to own comes to mind), and you had to bleed it out. Honestly it's not my favorite setup so I may consider one of those spacers if I can confirm that they actually work with a real thermostat.

At this point it's still lower than the inlets to the heater core and also the top of the radiator, so it "should" function. We'll see. I'll be driving around with the laptop open for a while. I think the CLT sender being accurate is actually more critical so long as you don't get a total trash reading on the gauge.

I am unsure about MSII. I never researched anything in depth other than the MS3X/MS3Pro. I think if you were considering MSII, you could probably just go with the Microsquirt instead, as I think they have similar functionality.