4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

car lacking power

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Old 06-22-2011, 10:39 AM
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smokeystang
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Default car lacking power

How do I tell if Egr is bad? Going to have it shut off with my tune that's coming today. Bought an sct tuner and hope its worth the money. Car don't seem to have the power it did before I washed the motor. Changed plugs, wires, coils and seems to run smooth but lacking power. Can hear cold air intake more now when on it hard, which some people say plugged cat. I did find Dvořák sensor melted after wash and running like crappy, fixed it and it blew the lines off a few times but don't no more. It's bothering me and wish I never washed it. Ran mint before wash and don't seem like it now. Please help anyone !
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Old 06-22-2011, 10:40 AM
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smokeystang
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Dvořák is suppose to be dfpe sensor in original post.
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Old 06-22-2011, 12:27 PM
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school boy
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any codes or check engine lights?
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Old 06-23-2011, 12:15 AM
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There was a po 135, so I changed o2 sensor on #1 cyl side before cat and the wire's were damaged from some bonehead threading it in using wire's. Anyways cleared code and not been back. Tonight I installed sct tuner performance tune I had made, deleted Egr, and rear o2 sensors along any emissions they could. Buying an h pipe with hollowed cats tomorrow. Car runs good but still seems like it takes longer to get up to top end longer than it did before washing motor. Hope it is a plugging cat which the h pipe should correct. Just stumped thinking cat plugged from wash. But also finding dpfe sensor melted has me thinking it.
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