Power FC Failure?
I'm now on my 3rd alternator because of bad luck with refurbed units. I installed the 3rd one this morning and it is putting out 12v+, however my car wont turn over and the boost reading on the Commander says +.64.....even when the car is turned off.
I tried to unplug the boost sensor and the PFC reads +2.14...even unplugged, WTF. My car seemed to be running fine before the need for the new alternator and rough when the alternators failed (below 11.5v). When i try to turn it over it sputters and sounds like shit but never actually starts. Im leaning more towards the PFC or electrical system as my problem and not so much the engine its self but i could be wrong.:scratch: Any ideas as to why the PFC is suddenly reading wrong? Or has anyone experienced a similar problem before? Where to start? Jason |
The PFC is reading boost, its too rich, it wont start. Either you have a short or the map sensor is toast. How are your other sensors reading like tps, omp, etc., normal?
thewird |
did the PIM scale/ offset settings get changed from normal to option1. option2 etc???
Some have done this on accident playing with the comander. Do you have a 2 or 3 bar map sensor? |
Originally Posted by Knockers
(Post 11295834)
did the PIM scale/ offset settings get changed from normal to option1. option2 etc???
Some have done this on accident playing with the comander. Do you have a 2 or 3 bar map sensor? |
Originally Posted by thewird
(Post 11295821)
The PFC is reading boost, its too rich, it wont start. Either you have a short or the map sensor is toast. How are your other sensors reading like tps, omp, etc., normal?
thewird |
From the main screen on the commander go to "settings/etc" then "sensor check". If anything is highlighted then the PFC isn't reading it. Typically if the MAP sensor isn't reading correctly your TPS sensors will be highlighted in the sensor check screen, this would indicate a failure within the PFC more than likely.
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Originally Posted by Turbo8
(Post 11296199)
From the main screen on the commander go to "settings/etc" then "sensor check". If anything is highlighted then the PFC isn't reading it. Typically if the MAP sensor isn't reading correctly your TPS sensors will be highlighted in the sensor check screen, this would indicate a failure within the PFC more than likely.
thewird |
3 Attachment(s)
Do these help?
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Originally Posted by thewird
(Post 11296201)
Could be a short in the wiring too.
thewird
Originally Posted by Hotwheelz
(Post 11296224)
Do these help?
If everything checks out, then I would suspect either the MAP sensor is bad or the wiring for it. |
Great feedback guys.
I found that my PIM voltge was set to program 2 instead of "normal". I must of accidentally set it to another PIM setting and when I set it to normal, then BAM. Started right up :0. I think there is some minor calibration issues i need to correct as was stated by Turbo8 because now in the start postion the boost is reading -54. At least she's runnin again |
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