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HELP!!.....only reading 2.9psi max boost on dashdyno from obd 2 port??
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| 01-27-2008, 02:35 PM | #1 |
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HELP!!.....only reading 2.9psi max boost on dashdyno from obd 2 port??
it was calibrated for 0.0 psi with ignition on engine off, reads -9.7 psi at idle while at operating temperature. Only goes up to 2.9psi WOT at operating temperature. Does not pass 2.9 like something is limiting it....
 This is retarded i should be getting 8.0-8.5psi wtf?? This may actually be accurate as I always felt it didn't pull as good as the cars I test drove.
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| 01-27-2008, 02:47 PM | #2 | |
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| 01-27-2008, 08:36 PM | #3 |
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The dashdyno is reading wrong or the ecu is sending the wrong reading, I'm thinking it's the dashdyno. I ran an actual line from the main vacuum line underneath the airfilter housing and got 8psi. Thanks for the response kyleh.
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| 01-27-2008, 08:37 PM | #4 | |
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| 01-27-2008, 08:43 PM | #5 |
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The MAP reading you are getting is from the intake manifold sensor which only goes to about 2.5 - 3.0 PSI positive pressure. The TMAP (or boost pressure sensor) doesn't read vacuum but does read boost. Apparently the TMAP is not exposed to the OBDII addressing.
Nothing is wrong, just a limitation of the OBDII reader. |
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