TPS and MAP on Microsquirt
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
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anonymous.shyster
- MegaSquirt Newbie
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- Joined: Sat Aug 27, 2011 6:00 am
TPS and MAP on Microsquirt
Running a carb setup with Microsquirt ECU and controlling the ignition timing using alpha-N. As this isn't the most desirable setup for a turbo engine, I'm thinking of running a MAP sensor along with the TPS. As there is only one vref, how is this done? I've read that the vref shouldn't be spliced or shared. Is this true?
Peugeot 504 Intercooled T04 Turbo, Four Mikuni R1 carburettors, external waste gate, Microsquirt ignition, 5 speed.
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DonTZ125
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Re: TPS and MAP on Microsquirt
The MAP sensors generally have very low draw, and it doesn't fluctuate. Powering this off VRef is actually quite common.
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Bernard Fife
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Re: TPS and MAP on Microsquirt
a.s,I've read that the vref shouldn't be spliced or shared. Is this true?
This is not generally true. Vref can source a number of components, as long as the total current draw is low (less then 200 milliamps or so) and the connected components and wiring don't induce noise into the Vref supply (most won't, but if the Vref wires were wrapped around the spark plug leads or something silly like that, it could cause problems).
As dontz notes, MAP sensors draw very little current, so you will be fine.
Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it.” - George Bernard Shaw
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anonymous.shyster
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Re: TPS and MAP on Microsquirt
Ok, thanks for the info 
Peugeot 504 Intercooled T04 Turbo, Four Mikuni R1 carburettors, external waste gate, Microsquirt ignition, 5 speed.