Hello. I recently bought a 08 sky base with a mallet supercharger. Does anyone know if an OBD2 gauge would be able to pull boost? I was looking at getting either the Aeroforce interceptor 2 gauge combo or an Edge pro insight. I’m just not sure if I will be able to get a boost/vacuum number from a 2.4 ECU. Any help would be greatly appreciated
Yes he can and as JohnWR mentioned, it is only a one-bar MAP sensor which will only read up to ambient pressure and into vacuum (negative pressure)
That's IF it's a stock MAP.
With the supercharger it has to be tuned as well and they may have put in a 2 or more bar MAP. If they have, then they had to set it up in the tune and IF they did this, the OBDII will read the boost values.
wjk221, I would get a bluetooth enabled OBDII scanner. You can get them on eBay for under $10. Then download the Torque app for android devices. This is free. (There is a pro version but you won't need that) This can read your MAP sensor and tell you if it will see only vacuum (negative numbers) or if it has been changed to read boost.
This also works as a code reader if you ever get a check engine light.
Why not get a dedicated boost gauge? They are inexpensive and typically very easy to install. I realize you are looking at specific gauge packages, IMHO boost pressure is one I would want "on" all the time to monitor.
Usually the OBDII gauges let you monitor multiple PIDs like intake temps, fuel trims and knock. In a conversion like this, monitoring knock can be beneficial.
I have a boost controller and gauge in my car because it's a turbo conversion and the controller is required (kinda) to operate the turbo properly. With a supercharger, the pulley size controls boost level so a controller is necessary and a dedicated boost gauge/controller is less critical.
Yeah, it HAS to have a MAP sensor capable of reading boost or else it would run extremely poorly. I would definitely recommend what Robo said and just pay a few dollars to check it with the torque pro. I have pics on here somewhere showing what I was able to do for guages on a dedicated tablet. I can read KR, Intake temps, Boost, and RPMS all on the same screen.
It will even mark the highest and lowest numbers on each gauge which really comes in handy (like for instance when I wasn't looking at the IAT2 numbers closely, but it showed me my IAT2s got to a high of 130 degrees, or showing me the highest KR I would see on a run).
Also, to the OP....Please post a bunch of pics of your car!!!!
IIRC, the ECM logic in the LE5 doesn't use the MAP for fueling or timing (nor I believe does the LNF but I don't know much about the Direct Injection logic). Fueling is all MAF based. I know adding a multi bar MAP sensor was an option when I went turbo...I mean it wasn't optional for ME but that's just me. LOL
There is no mention of an alternate tune in the service manual, and (oddly) no indication of what action that fault will cause.
The fault itself is a sensor reading that is out of range low, indicating either a bad sensor or a wiring problem.
Isn't that what a "tune" is? ie: Changes to the lookup tables.
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