Question about 1999 Mercury Cougar
I am assuming from your description that the hose you are talking about is going from the DPFE sensor down to the exhaust. From what you are describing from your symptoms the catalytic convertor/s may be stopped up and the excessive exhaust back pressure keeps blowing the hose off.
It is very easy to check for a exhaust restriction on this vehicle.All you have to do is hook a vacuum/pressure gage to the hose coming from the DPFE sensor and measure the exhaust back pressure. It should be 1 psi or less at idle and when you go to wide open throttle it should be between 3-4 psi. Anything more would be a restriction which would most likely be a stopped up catalytic convertor.
Posted on Mar 05, 2009
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