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#1
06-24-2005, 08:37 PM
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flowmasters? hard on cats?
are flowmasters hard on cats? i put one one and its been on for about 6 months and i think the cat may be falling apart. when istart it up and i hit the gas you can here a slight rattle. i can hear its something inside and not out. its the orginal cat. is it age or the muffler?
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95 jimmy. Vortec V6. 4.3 liter CPI. ,2.5" catco cat, 2.5" cat back with flowmaster muffler split rear., 40 street series, 2 12" audiobahns in custom box,K&N CPI intake system. 71 Mustang coupe- project car. stock 302 with Cobra intake, holley 650dp, afco racing radiator, headman headers, msd distributor, 2.5" from the headers.C4 tranny with shift kit, Mach 1 body lay out. 90 cav, 2.2 tbi, gas getter. 99 chevy s10 zr2, 6" lift, duel exhaust. 5 speed. 
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#3
06-25-2005, 12:12 AM
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Re: flowmasters? hard on cats?
What you might be seeing is normal cat failure.
Especially if you ever had a bad CPI pouring fuel into it some time in its past.
__________________
1995 Factory Blazer Service Manual for sale, PM if interested.
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#4
06-25-2005, 09:22 PM
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Re: flowmasters? hard on cats?
how much louder do u think it would be if i pulled the cat off and put a pipe in instead of another cat? i know it wouldn't pass emissions but i got 2 years until then.
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95 jimmy. Vortec V6. 4.3 liter CPI. ,2.5" catco cat, 2.5" cat back with flowmaster muffler split rear., 40 street series, 2 12" audiobahns in custom box,K&N CPI intake system. 71 Mustang coupe- project car. stock 302 with Cobra intake, holley 650dp, afco racing radiator, headman headers, msd distributor, 2.5" from the headers.C4 tranny with shift kit, Mach 1 body lay out. 90 cav, 2.2 tbi, gas getter. 99 chevy s10 zr2, 6" lift, duel exhaust. 5 speed.
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#5
06-26-2005, 01:41 AM
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Re: flowmasters? hard on cats?
It will get louder, but no by much.
It will also sound a lot more raspier.
__________________
1995 Factory Blazer Service Manual for sale, PM if interested.
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#6
06-26-2005, 11:54 PM
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Re: flowmasters? hard on cats?
If you've got OBD2 you'll get a check engine light if you remove the cat. 95 is a borderline year for the OBD1 -> OBD2 switch and I'm not that familiar with when the Blazer might have switched. If it is OBD2 there's an O2 sensor before and after the cat to determine if the cat is working properly.
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#7
06-27-2005, 01:13 AM
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Re: flowmasters? hard on cats?
95 jimmy has an O2 sensor before and after the cat.
Don't remove the cat if you have one after the cat because it will throw a code. You can get a high flow 2.25" cat on ebay for cheap and have it installed.
__________________
1995 Factory Blazer Service Manual for sale, PM if interested.
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#8
06-27-2005, 01:17 AM
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Re: flowmasters? hard on cats?
check out the seller Performance Curve he has alot of different stuff.http://stores.ebay.com/Performance-C...QQftidZ2QQtZkm
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1991 Chevy S-10 Blazer 5.7 V8 RIP 1999 Chevy Blazer 2dr 4.3
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#9
06-27-2005, 02:17 AM
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Re: flowmasters? hard on cats?
__________________
1995 Factory Blazer Service Manual for sale, PM if interested.
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