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Cat Back Question

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Old 08-31-05, 08:36 AM
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Cat Back Question
Hello I Have A 93 Fd And It Has An Pf Exhaust On It And When It Is At Idle The Car Is Popping A Little. Is This Because I Have A Catback Or Is There Somehting Else I Should Look Into....
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Old 08-31-05, 06:34 PM
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do you have the stock downpipe/cat and main cat?
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Old 08-31-05, 06:48 PM
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Perfectly normal. Just about everyone w/ an aftermarket exhausts gets "popping" (and even backfiring!) sometimes.
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Old 08-31-05, 06:55 PM
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My stock FD does the same thing, a reputable mazda service shop here in Sacramento couldnt find out why......
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Old 08-31-05, 06:58 PM
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i have a down pipe with stock cat back and mine pops at idle also. but its normal
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Old 08-31-05, 07:03 PM
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Originally Posted by kraked

My stock FD does the same thing, a reputable mazda service shop here in Sacramento couldnt find out why......
FDs run rich @ startup. If this "reputable mazda service shop" didn't know that, I'd stop bringing the car there.
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Old 08-31-05, 07:23 PM
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i have the same exhaust... i havent heard mine *pop* at idle... does backfire like hell though when i accelerate hard
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Old 08-31-05, 07:59 PM
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I have DP, MP, & CB and it 'pops' when the engine is still cold, but when it is warmed up it idles smooth as buttah.
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Old 09-01-05, 01:26 AM
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Originally Posted by afterburn27
I have DP, MP, & CB and it 'pops' when the engine is still cold, but when it is warmed up it idles smooth as buttah.
same here, i kinda like the way it sounds like that
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