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Problem With HP E47 tune

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Old Aug 25, 2016 | 01:20 AM
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Nazgul 9
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Problem With HP E47 tune
So I finally got the HP E47 tune loaded onto my ecm.. and its idling crazy... up down...up down....and i have a p0557 code....any ideas???


Thanks
Vince
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Old Aug 25, 2016 | 02:10 AM
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whopper
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Have you looked up the code? ie: P0557 Brake Booster Pressure Sensor Circuit Low Voltage OBDII Engine Light Trouble Code | Engine-Codes.com
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Old Aug 25, 2016 | 03:03 AM
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Nazgul 9
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I am sorry I should have stated I did indeed look up the code I was wondering if anyone else had this problem or this code???
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Old Aug 25, 2016 | 09:50 AM
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whopper
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Using the SEARCH tool at the top of the page showed only 1 thread discussing the p0557 code - and traced it back to a bad connection - https://www.chevyhhr.net/forums/hhr-...-20946/page14/

But it is a thread from way back in 2009.
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Old Aug 25, 2016 | 10:57 AM
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donbrew
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I am thinking the erratic idle is causing the brake booster problem, or the brake booster vacuum line is disconnected
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Old Aug 25, 2016 | 11:36 AM
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DrLoch
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Lets back up here for just a second.

Who's tune is it? Was it fine before you put the new tune in?
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Old Aug 25, 2016 | 11:56 AM
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Nazgul 9
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Its 2005HHRAUTOS E47 HPTune and it is a new ecm just got flashed had no problems or codes...
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Old Aug 25, 2016 | 12:02 PM
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donbrew
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Same sensors as 2005HHRAUTO has?
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Old Aug 25, 2016 | 12:04 PM
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Nazgul 9
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do you mean 2bar or 3 bar?? cause I am honestly not sure and I was thinking about that myself...
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Old Aug 25, 2016 | 12:23 PM
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DrLoch
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Originally Posted by Nazgul 9
do you mean 2bar or 3 bar?? cause I am honestly not sure and I was thinking about that myself...
Bingo. He's using 3 bar sensors, if you haven't changed your sensors that is your issue. Put the stock tune back in it and do some more reading.
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