engine ping
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Logistics Pro
Joined: Jun 2009
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From: metairie, LA
engine ping
Hey guys, its been a while. my 97 expy is starting to ping under a load. it sounds like a bad timing type of ping. i know the timining is not adjustable (that i know of) any ideas?
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Yes but it's a slow process that has to be done over a long period of time by using fuel cleaners or by installing a vapor bottle.
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Logistics Pro
Joined: Jun 2009
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From: metairie, LA
. what about running seafoam through the vacuum line every so often? ill have the code reader on it later tonight. ill post up what i find. thanks
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Logistics Pro
Joined: Jun 2009
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From: metairie, LA
i only pulled 1 code. 0420-catalyst system efficiency below limit,bank one. help me out, where to begin?
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Check into either a bad cat or a bad downstream O2 sensor on the passenger side.
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Logistics Pro
Joined: Jun 2009
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From: metairie, LA
Will do. I have a feeling it is the cat because it threw a code for that a while back, but it was after she filled up with ethanol. That code never came back and was the first code we had in months. Should I just throw an 02 sensor in it and see what happens?
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nick_ct_203
1997 - 2006 Expedition & Navigator
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Oct 31, 2014 03:46 PM
