Hey all! I've got an interesting setup which currently runs fairly well, yet still dialing it in.
It's a 250 Chevy straight six, with 3 throttle bodies, individually feeding the 3 siamesed cylinders. I've got 3/8 fuel line between each t-body to try to make a more even vacuum reading to the MAP sensor. MAP is slightly jumpy at idle, around 55-60 or so.
The PCV also pulls off this source, as it's my only vacuum source available. So does the regulator.
On top of all this, I'm looking at adding power brakes, which might help or hinder the vac signal.
Any ideas to this? Am I ok, or needing to change things? Thanks in advance!
John
MAP sensor vacuum source questions....
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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
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1950ChevySuburban
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MAP sensor vacuum source questions....
I'll take an inline in mine!
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Ollie8974
Re: MAP sensor vacuum source questions....
You might have to rig up a vacuum reservoir to store the vacuum for power brakes. I know some muscle cars with radical cams used this set up. You could also connect the map sensor to the reservoir to smooth out the idle.