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99 E150 5.4 Pings when cold

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ktmlew

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Trying to help a friend in Fla. Says it pings badly the first 10 minutes or so of operation. Had an O2 slow response code. Replaced sensor and PCV hose/line. He tried running Seafoam through the PCV line. No joy. I'm guessing MAF, but keep thinking they had a re-flash for this? He doesn't have a scanner to view data...I know it's not much to go on. He hasn't checked fuel pressure yet.

 

The cold ping deal just seems familar though...

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