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Catalytic Converter Question
sLaps_Forehead
Brisbane, Queensland
5734 posts
I have an old a2b'er Hyundai Lantra 1995 sedan that is generally in pretty good condition.

For the record there are no oil leaks, it's only done 105k, it has a new muffler done in the last 6 months.

However, recently the 'Check Engine" warning light comes on usually after fairly long urban trips as well as a burning oil smell?
Now I've looked up the Car Manual and it says that if the Catalytic Converter is malfunctioning this in turn triggers the oxygen sensor in the CC and the warning light comes on.
I've googled a bit but I was wondering if any of the car-savvy qgl'ers had any thoughts on this?

Mainly I'm wondering if:

- The CC is the actual problem or something else? Seeing that the car has such low mileage.

- Can the CC be cleaned rather than replaced as it may just be clogged up?

- Where is the best place to go to see what the actual problem is? Mechanic or Muffler Specialist?

- If I do need to replace it, roughly how much is it going to cost and again where is a good Muffler Shop to get it done at e.g Midas?

Cheers ~

09:58am 31/12/11 Permalink
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09:58am 31/12/11 Permalink
m3nt4l
Brisbane, Queensland
1896 posts
If you put your foot over the exhaust does the engine change it's note and goes to stall?
10:05am 31/12/11 Permalink
teq
Brisbane, Queensland
12221 posts
you already have the tools you need around the home to fix a catalytic converter

http://i.imgur.com/lrvhV.jpg
10:11am 31/12/11 Permalink
Whoop
Brisbane, Queensland
19120 posts
more like a screwdriver teq

mr slaps, as a qualified backyard bodgyboy mechanic (i.e. I have no qualifications at all) I'm happy to tell you your car is broken.

Google the method of checking the fault codes, on my car I bridge 2 pins in the diagnostic connectors. Which pins depends on the car, on my 'rolla it's t2 & earth, on the evo it's pin 1 and earth so you'll have to look up which pins to bridge (if its even possible on a hyundai)

Read the error code off the dash light. It should flash long and short flashes, long flash = 10's short = 1's. So if it flashes 2 long flashes and 5 short ones that's error 25.

Look up the error codes on the net, sometimes these can be hard to find, sometimes they're easy.

It doesn't matter whether or not you think you're able to fix it yourself but finding out what the problem is can sometimes tell you whether you need to take it to a mechanic or whether it's a simple problem like changing the 02 sensor yourself with nothing more than a 22mm spanner. (or 17 if it's the small one).

If you can't find the codes, or you're happy to pay someone no matter what the problem is then take it to a reputable mechanic who has a diagnostic scan tool. When I had problems with my commodore I just went to motorama holden, they read the codes & cleared them and didn't charge anything. You could try ultratune or something like that.
10:40am 31/12/11 Permalink
Captain Lateral
Brisbane, Queensland
4181 posts
yeah, if your car is reporting that an o2 sensor is failing, backyard mechanic says that there might be a problem with your O2 sensor, I know when mine failed it was like driving a boat. check it with a multimeter to see if its performing within spec.

really though, you should take it to a mechanic, because its not that high mileage, but it could be a symptom of something more severe, like an oil seal or gasket failure.
11:07am 31/12/11 Permalink
paveway
Brisbane, Queensland
15957 posts
you can't clean a catalytic converter, you just get a new one or knock the guts out of your existing one lul

if you do knock the guts out just hope you don't drive by one of the random queensland transport emissions testing spots they like to set up sometimes (like an RBT but emissions testing basically) and they don't discriminate what cars the test, if you think you're not going to get stopped because you aren't driving a skyline or whatever

a new one will prob cost $100 - $150 installed at an exhaust place

don't go to middas or something gay like that, just go to an exhaust place

last edited by paveway at 11:23:45 31/Dec/11
11:22am 31/12/11 Permalink
Tollaz0r!
Brisbane, Queensland
12119 posts
If I've learned anything from The Big Bang Theory it is to ignore the Check Engine light, surely Penny can't be wrong.
11:33am 31/12/11 Permalink
Habib
Brisbane, Queensland
338 posts
at the risk of pointing out the obvious, I take it you've checked the oil level after said long trips with burning oil smell? Sounds more like an oil leak.
08:01pm 31/12/11 Permalink
Whoop
Brisbane, Queensland
19125 posts
If I've learned anything from The Big Bang Theory it is to ignore the Check Engine light, surely Penny can't be wrong.

I didn't ignore the check engine light


I ignored the fuel light.

you can't clean a catalytic converter, you just get a new one or knock the guts out of your existing one lul

I think he meant use the broom handle to do just that.

Actually, there's a good point that I overlooked. If it is burning oil, perhaps the o2 sensor is coated in s*** and thus not working at all.

Anyway this is all neither here nor there, we don't even know it's the o2 sensor that's causing the check engine light to come on, either read the code yourself or take it to someone who can read them for you & see what the computer says is actually wrong.
08:50pm 31/12/11 Permalink
Auz_Guy
Brisbane, Queensland
400 posts
Over-filling your engine with oil will cause leakage, burning smell and your cc to be filled with oily goodness. You haven't over-filled have you?
10:41pm 31/12/11 Permalink
paveway
Brisbane, Queensland
15962 posts
nothing wrong with a bit of extra oil, why would it cause any of those problems?

It's encouraged in stock rb engines if you're doing tracks days so you don't get starvation
10:55pm 31/12/11 Permalink
Auz_Guy
Brisbane, Queensland
401 posts
nothing wrong with a bit of extra oil, why would it cause any of those problems?

It's encouraged in stock rb engines if you're doing tracks days so you don't get starvation


Just meant REALLY over filling it. Stranger things have happened.
11:19pm 31/12/11 Permalink
sLaps_Forehead
Brisbane, Queensland
5737 posts
Nah I haven't overfilled the oil.

A mate reckons the smell could be a clogged or bung CC that's overheating and cooking either the usual oily s*** and grime around the engine exhaust or it's heating up the plastic/teflon insuluation around the CC.

dunno but I'll take your advice and go to a mechanic or muffler specialist next week.
09:22am 01/01/12 Permalink
m3nt4l
Brisbane, Queensland
1899 posts
09:26am 01/01/12 Permalink
Whoop
Brisbane, Queensland
19129 posts
Nah I haven't overfilled the oil.

A mate reckons the smell could be a clogged or bung CC that's overheating and cooking either the usual oily s*** and grime around the engine exhaust or it's heating up the plastic/teflon insuluation around the CC.

dunno but I'll take your advice and go to a mechanic or muffler specialist next week.

the what? I haven't been under that many cars but the ones I have been under have never had plastic of any kind anywhere near the exhaust. The heat shields have always been made of steel.
06:08pm 01/01/12 Permalink
reload!
Brisbane, Queensland
6426 posts
unless getting another car is extremely out of reach there's no way I'd be spending money on a mid 90s hyundai
06:21pm 01/01/12 Permalink
sLaps_Forehead
Brisbane, Queensland
5739 posts
other than the cc problem its a good little car.

auto, air, abs
09:40pm 01/01/12 Permalink
m3nt4l
Brisbane, Queensland
1907 posts
Hyundai build(built?) their engines from Mitsubishi blueprints, so they weren't that bad. A lot better now though.
10:34pm 01/01/12 Permalink
Whoop
Brisbane, Queensland
19134 posts
^^ my mate had an excel for a runabout and while the engine was in decent condition the rest of the car was falling to bits. They're cheap s***boxes mass produced for the masses. Much like commodores.
10:58pm 01/01/12 Permalink
m3nt4l
Brisbane, Queensland
1908 posts
You could say that about most car's that don't have a stamp in the engine with a signature of the person who hand built it.
11:15pm 01/01/12 Permalink
Whoop
Brisbane, Queensland
19135 posts
actually not really, there's masproduced s***boxes for the masses, and then there's CHEAP mass produced s***boxes, like commodores and excels.
11:16pm 01/01/12 Permalink
m3nt4l
Brisbane, Queensland
1909 posts
Are you talking about just the excel or Hyundai in general? Because I agree on the excel, piece of cheap crap but that's why they sold so many.
11:20pm 01/01/12 Permalink
Whoop
Brisbane, Queensland
19137 posts
just excel
11:48pm 01/01/12 Permalink
teq
Brisbane, Queensland
12230 posts
just buy toyota and you can't go wrong
12:13am 02/01/12 Permalink
m3nt4l
Brisbane, Queensland
1910 posts
09:25am 02/01/12 Permalink
hardware
Brisbane, Queensland
9898 posts
Hyundai build(built?) their engines from Mitsubishi blueprints, so they weren't that bad.
Wrong, they were terrible. A timing belt and a non-clearance engine design? Hello bent valves! F*****g stupid engine design.

Also see that ute those vandals burnt? it was on LPG and it didn't explode.
09:41am 02/01/12 Permalink
m3nt4l
Brisbane, Queensland
1911 posts
I said not That bad, I didn't say good! Glad I don't have an interference motor when I did the headgasket and saw the condition of the belt. Also wonder why the previous owner put a new headgasket in and went through all the effort of taking it apart but didn't spend a couple of hundred and getting the head itself done O.o (7mge for those playing at home).
11:29am 02/01/12 Permalink
Whoop
Brisbane, Queensland
19139 posts
Wrong, they were terrible. A timing belt and a non-clearance engine design? Hello bent valves! F*****g stupid engine design.

Also see that ute those vandals burnt? it was on LPG and it didn't explode.

must have been empty

Glad I don't have an interference motor when I did the headgasket and saw the condition of the belt.

I think one of mine is :(
11:49am 02/01/12 Permalink
paveway
Brisbane, Queensland
15964 posts
supercheap's buzzing today with that 20% off sale, fyi
12:01pm 02/01/12 Permalink
Strik3r
Brisbane, Queensland
2014 posts
There is nothing wrong with an interference engine running with a timing belt. It just requires proper maintenence every ~100k kms. For most people, thats a timing belt every 5 - 7 years. If you are getting your car serviced by decent people at semi-decent intervals, they will be on top of when it needs to be done, and you will never have a problem. All of my cars have been interference engines with a timing belt, and i've never had a belt snap.

The 4G9 engines are bloody strong for a small 4 banger. My friend has a mirage which he flogs heaps, it has 320000ks and still gets 600ks of a 40 litre tank
01:03pm 02/01/12 Permalink
paveway
Brisbane, Queensland
15965 posts
thanks for posting what i couldn't be bothered to striker

not everyone drives a taxi hardware
01:30pm 02/01/12 Permalink
m3nt4l
Brisbane, Queensland
1915 posts
I think one of mine is :(


As long as you change the belt at the recommended times you shouldn't have a problem.
01:48pm 02/01/12 Permalink
Whoop
Brisbane, Queensland
19141 posts
also, I cbf editing my previous post to reply to hardware:
Also see that ute those vandals burnt? it was on LPG and it didn't explode.
Actually I heard on the news tonight that it DID explode, and shook nearby houses.
09:15pm 02/01/12 Permalink
m3nt4l
Brisbane, Queensland
1952 posts
10:50am 07/01/12 Permalink
Whoop
Brisbane, Queensland
19169 posts
The 17-year-old will appear at Beenleigh Magistrates Court on February 1 while the other three boys will be dealt with under the provisions of the Youth Justice Act 1992.

Nah f*** it, commit an adult crime, do adult time I say (obviously in a detention center with other youths). Bunch of softies will probably let them off with a stern word from mummy.
12:21pm 07/01/12 Permalink
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12:21pm 07/01/12 Permalink
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