Pressure release after starting | Ford Explorer Forums

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Pressure release after starting

HAMMOND B-3 guy

New Member
Joined
August 2, 2002
Messages
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City, State
Newington, CT
Year, Model & Trim Level
'00 XLT 4.0L
My '00 XLT 4.0L, 133K miles, recently began making a LOUD pressure release (bang) noise soon after starting. It feels like it's under the passenger side floor but I can't tell.

It's also running very rough upon starting, then it suddenly clears up as if the computer is using a fall back program. I changed the rear OX sensor but the front is original.

Any ideas are appreciated.

Al
 






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