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Old 22-11-2007, 09:40 AM   #1
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Default how to check if exhaust is blocked?

a while ago i melted a cat, when we took it off the innards were in pieces etc.

replaced it with a decat pipe, hey presto car felt much quicker again.

after a while i noticed a slight drop in power, and i am losing about 2psi of boost (its a supercharged zetec) and it came up with a fault code of exhaust blockage when we plugged in a diagnostic.

i thought it had the code from when the cat was fooked, but now i'm thinking maybe bits of the cat had gone down the pipe into the next silencer and are partially blocking it? when i rev it up i can hear something rattling.

is there a way of checking if the silencer has got a partial blockage without removing it? its got 2 centre boxes welded together and its a real pain to remove them.
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Old 22-11-2007, 11:49 AM   #2
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Difficult one.

Removing it section by section from the back and see if the engine runs
better each time but if its weleded you have a big problem !


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Old 22-11-2007, 12:51 PM   #3
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i think i can remove the 2 centre boxes that are welded together, i think they are clamped either side. but its a pain getting under the car for access cos its so low etc. just wondered if there was any way of testing it without having to remove.
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Old 22-11-2007, 01:46 PM   #4
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do u have a 02 sensor after the cat
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Old 22-11-2007, 01:52 PM   #5
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get the car uo on a ramp and see if the exhaust has a hot/cold spot that should tell if its blocked
something like this would help
http://cgi.ebay.co.uk/RD-Logics-IT02...QQcmdZViewItem
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Old 22-11-2007, 01:58 PM   #6
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i dont have a cat any more, i done away with it.

i might just take it back to the powerflow dealer see if he's got one of them infa red things, if not he'll whip the centre section out and check it out.
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Old 22-11-2007, 01:58 PM
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blockage, blocked, blocking, car, cat, check, cloged, clogged, exhaust, ford, muffler, partially, plugged, pluggede, test

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