MAP @ idle Diablo Sport
09-21-2008, 05:37 PM
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MAP @ idle Diablo Sport I just got a Predator tuner from a guy I bought some parts from but the tuner is locked. I hooked it up to use it for diagnostics and my MAP is 14.1psi with the car off and around 5psi with the car on at idle. I guess my question is: Is this normal? Is it because of atmospheric pressure(14.7psia)? When I turn the car on and it goes to 5psi, would that actually be around 10psi vacuum on a boost gauge? Any help is appreciated.
09-22-2008, 07:03 PM
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I have a blower and that's why I was concerned. I don't have a boost gauge and I was worried something went wrong with the install because the Predator showed 5psi when I turned it on. Then I noticed it showed 14psi before the car was on so I was hoping the 5psi it showed while at idle was actually vacuum.