General Miata Chat A place to talk about anything Miata

Reason's Why...

Thread Tools
 
Search this Thread
 
Old 04-22-2011, 12:22 AM
  #1  
Junior Member
Thread Starter
 
gjenks's Avatar
 
Join Date: Apr 2011
Location: Mount Airy, MD
Posts: 88
Total Cats: 0
Default Reason's Why...

I have gone through 4 catalytic converters in a year? 2 warm-up cats and 2 mid-pipe cats.

Stock 1999 miata, 5speed.

Cheap cats (first 2 were oem)? Engine running rich (but temp gauge reads normal)? Somebody out to get me?
gjenks is offline  
Old 04-22-2011, 12:29 AM
  #2  
Senior Member
iTrader: (9)
 
tasty danish's Avatar
 
Join Date: Sep 2009
Location: Yamato Japan
Posts: 691
Total Cats: 26
Default

If the engine's running rich you can blow cats. Figure out why you're rich.
tasty danish is offline  
Old 04-22-2011, 12:31 AM
  #3  
Junior Member
Thread Starter
 
gjenks's Avatar
 
Join Date: Apr 2011
Location: Mount Airy, MD
Posts: 88
Total Cats: 0
Default

My car is covering up for me being poor... Any likely causes I should check into first?
gjenks is offline  
Old 04-22-2011, 12:54 AM
  #4  
Senior Member
iTrader: (9)
 
tasty danish's Avatar
 
Join Date: Sep 2009
Location: Yamato Japan
Posts: 691
Total Cats: 26
Default

o2 sensors, and coolant sensor would be my first check. I've never owned a stock miata so I'm not an authority on what typically goes wrong, just speaking from general car knowledge. I'll let someone else go in depth.
tasty danish is offline  
Old 04-22-2011, 01:00 AM
  #5  
Want fries with that?
iTrader: (3)
 
rider384's Avatar
 
Join Date: Oct 2009
Location: Twin Cities, Minnesota
Posts: 2,011
Total Cats: 2
Default

I wasn't aware that apostrophes showed plurals.

Find out why you're rich, running rich will **** cats. Solution? Buy an MS
rider384 is offline  
Old 04-22-2011, 01:04 AM
  #6  
Junior Member
iTrader: (1)
 
southernmx5's Avatar
 
Join Date: May 2009
Location: TN
Posts: 328
Total Cats: 4
Default

Live in a state that doesn't have emissions testing.
southernmx5 is offline  
Old 04-22-2011, 01:17 AM
  #7  
Senior Member
iTrader: (9)
 
tasty danish's Avatar
 
Join Date: Sep 2009
Location: Yamato Japan
Posts: 691
Total Cats: 26
Default

Originally Posted by rider384
I wasn't aware that apostrophes showed plurals.
It doesn't. I was only talking about 1 engine. Get it: "If THE." Granted my usage in that case was incorrect, but, 's in addition to showing ownership can also imply "is" such as in the word "it's" which actually means, "it is"

As I said, it was a bastardization on my part, but try and keep up. And holy ****, really? On my nuts for apostrophe usage on a car forum? i wUd UnDeRsTanD iF i tAlK'd LiEk tHiZ, but seriously, I use capitalization and punctuation and you get me on a misplaced apostrophe? At least get my intended usage right. Context son!

/rant
tasty danish is offline  
Old 04-22-2011, 03:15 AM
  #8  
Elite Member
 
codrus's Avatar
 
Join Date: Mar 2007
Location: Santa Clara, CA
Posts: 5,167
Total Cats: 856
Default

Any rough running? 99s have been known to blow the coils and start dumping fuel into the cat.

--Ian
codrus is offline  
Old 04-22-2011, 08:20 AM
  #9  
Newb
 
SchumiMx5's Avatar
 
Join Date: Sep 2010
Location: Athens
Posts: 25
Total Cats: 0
Default

In cold start engine idling in high rpms and it's very rich.If you try to warm your car static it will harm your cat.
SchumiMx5 is offline  
Old 04-22-2011, 08:36 AM
  #10  
Elite Member
iTrader: (2)
 
Godless Commie's Avatar
 
Join Date: Jun 2009
Location: Istanbul, Turkey
Posts: 3,214
Total Cats: 1,687
Default

I would look at ignition problems first.
Misfires, worn insulation on plug wires, etc..
Godless Commie is offline  
Old 04-22-2011, 09:35 AM
  #11  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,501
Total Cats: 4,080
Default

Originally Posted by tasty danish
As I said, it was a bastardization on my part, but try and keep up. And holy ****, really? On my nuts for apostrophe usage on a car forum? i wUd UnDeRsTanD iF i tAlK'd LiEk tHiZ, but seriously, I use capitalization and punctuation and you get me on a misplaced apostrophe? At least get my intended usage right. Context son!
/rant

When you're on a site, any site, that requires the use of communication, specifically through the wirtten word, it is courteous to have some sort of respect for language arts.

To maunder around in such a opprobriuos manner opens you up for raillery.
Braineack is offline  
Old 04-22-2011, 09:59 AM
  #12  
Elite Member
iTrader: (2)
 
Faeflora's Avatar
 
Join Date: Jan 2007
Location: Los Angeles, CA
Posts: 8,682
Total Cats: 130
Default

Originally Posted by Braineack
To maunder around in such a opprobriuos manner opens you up for raillery.
Maunder?

opprobriuos?


Someone's been reading the dictionary
Faeflora is offline  
Old 04-22-2011, 10:01 AM
  #13  
Junior Member
Thread Starter
 
gjenks's Avatar
 
Join Date: Apr 2011
Location: Mount Airy, MD
Posts: 88
Total Cats: 0
Default

No, my car hasn't been running rough, misfiring or showing any other signs I've noticed. It hasn't thrown any engine codes except for the ones related to failing catalytic converters, but I'm aware running rich could damage the cats, I just wish there was some other sign before I have to spend $99 on an engine diagnostic with my repair shop.
gjenks is offline  
Old 04-22-2011, 10:02 AM
  #14  
Junior Member
Thread Starter
 
gjenks's Avatar
 
Join Date: Apr 2011
Location: Mount Airy, MD
Posts: 88
Total Cats: 0
Default

Originally Posted by rider384
find out why you're rich, running rich will **** cats. Solution? Buy an ms
ms?
gjenks is offline  
Old 04-22-2011, 10:02 AM
  #15  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,501
Total Cats: 4,080
Default

Originally Posted by Faeflora
Maunder?

opprobriuos?


Someone's been reading the dictionary

maunder /MON�dur/
v. to talk incoherently; to ramble

opprobrium /uh�PRO�bree�um/
n. disgrace, infamy, or reproach; the cause of shame or infamy

raillery /RAY·luh·ree/
n. good-humored banter or teasing
Braineack is offline  
Old 04-22-2011, 10:11 AM
  #16  
Elite Member
iTrader: (17)
 
pdexta's Avatar
 
Join Date: Aug 2007
Location: Knoxville, TN
Posts: 2,949
Total Cats: 182
Default

codrus has it right, weak ignition coils in the 99's are a very common problem. I picked up my car really cheap because it would barely move under it's own power. I told the dealer I'd buy it if they'd let me work on it in the back for an hour. Jacked the thing up, busted the cat out, drove it home and replaced the coils.

Post in the WTB section, enough of us that have converted to coil on plugs that there should be plenty of extra stock 99 coilpacks laying around that someone is willing to sell you.
pdexta is offline  
Old 04-22-2011, 10:29 AM
  #17  
Elite Member
iTrader: (7)
 
mgeoffriau's Avatar
 
Join Date: Jul 2009
Location: Jackson, MS
Posts: 7,388
Total Cats: 474
Default

Originally Posted by tasty danish
It doesn't. I was only talking about 1 engine. Get it: "If THE." Granted my usage in that case was incorrect, but, 's in addition to showing ownership can also imply "is" such as in the word "it's" which actually means, "it is"

As I said, it was a bastardization on my part, but try and keep up. And holy ****, really? On my nuts for apostrophe usage on a car forum? i wUd UnDeRsTanD iF i tAlK'd LiEk tHiZ, but seriously, I use capitalization and punctuation and you get me on a misplaced apostrophe? At least get my intended usage right. Context son!

/rant
The funniest part of you over-reacting is that I'm pretty sure he was referring to the misused apostrophe in the OP's thread title, and not the "engine's" in your post.

Way to freak out, though.
mgeoffriau is offline  
Old 04-22-2011, 10:31 AM
  #18  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,501
Total Cats: 4,080
Default

Reason is why.
Braineack is offline  
Old 04-22-2011, 11:07 AM
  #19  
Junior Member
Thread Starter
 
gjenks's Avatar
 
Join Date: Apr 2011
Location: Mount Airy, MD
Posts: 88
Total Cats: 0
Default

Originally Posted by mgeoffriau
The funniest part of you over-reacting is that I'm pretty sure he was referring to the misused apostrophe in the OP's thread title, and not the "engine's" in your post.

Way to freak out, though.
I wasn't going to say anything...
gjenks is offline  
Old 04-22-2011, 11:50 AM
  #20  
Want fries with that?
iTrader: (3)
 
rider384's Avatar
 
Join Date: Oct 2009
Location: Twin Cities, Minnesota
Posts: 2,011
Total Cats: 2
Default

Originally Posted by tasty danish
It doesn't. I was only talking about 1 engine. Get it: "If THE." Granted my usage in that case was incorrect, but, 's in addition to showing ownership can also imply "is" such as in the word "it's" which actually means, "it is"

As I said, it was a bastardization on my part, but try and keep up. And holy ****, really? On my nuts for apostrophe usage on a car forum? i wUd UnDeRsTanD iF i tAlK'd LiEk tHiZ, but seriously, I use capitalization and punctuation and you get me on a misplaced apostrophe? At least get my intended usage right. Context son!

/rant
Was talking to OP
rider384 is offline  


Quick Reply: Reason's Why...



All times are GMT -4. The time now is 03:06 AM.