Bad Cat?
01-03-2003, 01:43 AM
#1
Senior Member
Thread Starter
Join Date: Jan 2003
Location: Oxnard, CA.
Posts: 283
How does one know if the cat has gone bad? When I had my car tuned it was running a little less HP then the techs thought it should at .85 and when they uped the boost to 1.00 there was only a 6.5 increase in HP. They said it might be due to back preasure from a dead cat. Unfortunately I didn't have the time to leave the car for them to trouble shoot. I am currently running .85 but it takes forever to get there and i dont see it until third. Is that normal? Any help would be appreciated.
01-03-2003, 10:48 AM
#6
Senior Member
Join Date: May 2002
Location: California
Posts: 22,465
the main cats almost never go bad, they are bullet proof. the only 1 ive seen that was bad, the car had a misfire for a long time. it doesnt hurt to check it though, i think your problem might be elsewhere
mike
mike
01-03-2003, 11:43 AM
#7
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Thread Starter
Join Date: Jan 2003
Location: Oxnard, CA.
Posts: 283
Yeah, I can't pull it in Cali. The CARB cops would have a field day with that. What did you have in mind Mike? They checked the sequential system when they replaced the hoses and the motor is less than a year old(even though it was replaced by a dealer) and checked out fine on a compression test. I've also noticed a weird noise from the downpipe/cat area when i accelerate.
01-03-2003, 01:44 PM
#10
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Join Date: Jan 2003
Location: Oxnard, CA.
Posts: 283
Blown turbo? not cool. im still making full boost, just not as quickly as one would expect, don't know how much of a difference that would make. as far as ignition you, mean an upgrade like HKS or MSD? because I just(1.5 months ago) put in the good plugs and wires. A friend said I should mention that since i had it tuned I'm running hella rich. we can tell by smell since I dont have an EGT or A/F meter yet(i know, i know, its the next thing on my list).