Honda Prelude Forum
 
Go Back   Honda Prelude Forum > Tech-Talk > 5th Gen Honda Prelude

Thread Title
faulty converter?

 
Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 07-30-2008, 01:55 PM
macsemper's Avatar
I'm New
 
Join Date: Jul 2008
Location: Fishkill NY
Posts: 23
iTrader: (0)
macsemper is on a distinguished road
faulty converter?

would having a faulty cat blow a check engine light? i figgured it would. i brought my car in cause it feels sluggish and the mechanic said my engine is fine but i have a bad cat. i didn't even know a cat could reduce my performance.i know im probably stupid but figgured i would just check it out before i pay the money to get it fixed considering there is no light on.
Reply With Quote
  #2 (permalink)  
Old 07-30-2008, 07:17 PM
Rob Rob is offline
Platinum Member
 
Join Date: Jul 2007
Location: Roanoke, VA
Posts: 1,513
iTrader: (2)
Rob has a reputation beyond reputeRob has a reputation beyond reputeRob has a reputation beyond reputeRob has a reputation beyond reputeRob has a reputation beyond reputeRob has a reputation beyond reputeRob has a reputation beyond reputeRob has a reputation beyond reputeRob has a reputation beyond reputeRob has a reputation beyond reputeRob has a reputation beyond repute
Re: faulty converter?

Quote:
Originally Posted by macsemper View Post
would having a faulty cat blow a check engine light? i figgured it would. i brought my car in cause it feels sluggish and the mechanic said my engine is fine but i have a bad cat. i didn't even know a cat could reduce my performance.i know im probably stupid but figgured i would just check it out before i pay the money to get it fixed considering there is no light on.
I'm having alot of the same problems also too to boot my clutch went out. So while my Lude is down for the clutch job I'm pulling my CAT to unclog it, by unclog I mean ram the heck out of the thing with a wooden broom stick or something. Yes a CAT not performing like it should or totaly clogged can even keep your car from starting is what I have heard. I am almost certain my poor performance is coming from a slightly clogged CAT.
Reply With Quote
  #3 (permalink)  
Old 07-31-2008, 12:06 AM
Bronze Member
 
Join Date: Jun 2008
Location: Ohio
Posts: 234
iTrader: (0)
poohbear will become famous soon enoughpoohbear will become famous soon enough
Re: faulty converter?

a check engine light will be thrown if your cats efficiency drops below a certain % im trying to recall from memory here but i think its 8.5% or below will throw and engine light.....
Yes it will harm performance and gas millage... Your car will stop running off what it reads from the o2 sensors and go to its previous settings. The computer will run the car on what it is pre programmed with and thats not always what it should be... Your computer needs to see whats going on with the car and adjust as it sees fit... If your computer needs to cut out particular sensors it obviously wont run correctly.

Im guessing your mechanic ran the code? Go to an autozone and have em plug in your car... If you have a faulty o2 sensor that will also cause the CEL to flash at ya.... Usually two things will show up with that type of CEL.. The handheld will tell you that an o2 sensor is faulty and which bank it is and/or your cat efficiency has dropped below needed parameters. BUT your computer sees that your cat has dropped below needed efficiency because it getting false information from the bad o2 sensor. Get what im saying?
Go have your car scanned again and double check make sure that it is the cat....
hope this helps man good luck....
Reply With Quote
  #4 (permalink)  
Old 08-06-2008, 10:57 PM
macsemper's Avatar
I'm New
 
Join Date: Jul 2008
Location: Fishkill NY
Posts: 23
iTrader: (0)
macsemper is on a distinguished road
Re: faulty converter?

you guys are great thanks for the help, im thinking it is my cat because i hear a ratteling sound at low rpms, also the reduced gas mileage and performance sounds like it could be a cat issue considering my engine checks out fine. im going to autozone tomorrow to get the reading on the computer. my check engine light is definatly broken cause it doesn't come on when i start the car. the mechanic thinks the dealer might have pulled the wire on it cause he knew the cat was bad. lol i love preludes but i have such bad luck with them.
Reply With Quote
  #5 (permalink)  
Old 08-06-2008, 11:33 PM
Bronze Member
 
Join Date: Jun 2008
Location: Ohio
Posts: 234
iTrader: (0)
poohbear will become famous soon enoughpoohbear will become famous soon enough
Re: faulty converter?

Quote:
Originally Posted by macsemper View Post
you guys are great thanks for the help, im thinking it is my cat because i hear a ratteling sound at low rpms, also the reduced gas mileage and performance sounds like it could be a cat issue considering my engine checks out fine. im going to autozone tomorrow to get the reading on the computer. my check engine light is definatly broken cause it doesn't come on when i start the car. the mechanic thinks the dealer might have pulled the wire on it cause he knew the cat was bad. lol i love preludes but i have such bad luck with them.
I hear ya my luck is sub par too... assuming the exhaust is in good shape and hung tight That rattling could be one of two things 1) its the heat shield or 2) the honey comb inside the cat came loose. Both indicators of a bad cat. Besides maybe its time to get yourself a random tech cat and love the power increase

give me an update on what the scanner tells ya and we will see if we cant help you out a little more...
Reply With Quote
  #6 (permalink)  
Old 08-07-2008, 01:04 AM
nevrdun's Avatar
Platinum Member
 
Join Date: Aug 2007
Location: Montana
Posts: 1,432
iTrader: (1)
nevrdun has a reputation beyond reputenevrdun has a reputation beyond reputenevrdun has a reputation beyond reputenevrdun has a reputation beyond reputenevrdun has a reputation beyond reputenevrdun has a reputation beyond reputenevrdun has a reputation beyond reputenevrdun has a reputation beyond reputenevrdun has a reputation beyond reputenevrdun has a reputation beyond reputenevrdun has a reputation beyond repute
Re: faulty converter?

I too had a faulty cat. I didn't throw a CEL but heard the rattling you speak of. Sure enough pull the cat out and clunk clunk clunk. So I just helped it fall out :) I was looking for that aftermarket cat company Random! Heard good things about them.
__________________
JDM: Just Doesn't Matter

Team BBeer6
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
greddy cat. converter? Bobby_V 5th Gen Honda Prelude 3 07-30-2008 02:44 PM
Faulty Seatbelts Cash68 3rd Gen Honda Prelude 19 10-07-2007 12:25 AM
-----cat converter?----- shadow29485 4th Gen Honda Prelude 3 08-29-2007 08:15 PM
Catalytic Converter wite2nr98 5th Gen Honda Prelude 14 08-15-2007 11:18 AM


All times are GMT -4. The time now is 10:20 PM.



Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
LinkBacks Enabled by vBSEO 3.6.0 PL2 © 2011, Crawlability, Inc.
vB.Sponsors


Copyright © 2006-2009 PreludeZone.com All Rights Reserved.