DorsetStrider
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| posted on 15/2/07 at 05:57 PM |
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EMISSIONS HELP DESPERATELY NEEDED
Hiya all.
My Tintop failed its MOT on emissions today. As many of you know I'm currently a VERY poor mature student (thanks in part to the wonderful
policies of this government)
So need to fix it myself.
The figures from the test are as follows...
Fast Idle test 1
limits actual pass/fail
Speed 2450-2850 2671 pass
CO: <0.30% 5.71% fail
HC: <200ppm 218ppm fail
^ 0.97-1.03 0.855 fail
Fast Idle Test 2
Speed 2450-2850 2679 pass
CO: <0.30% 5.3% Fail
HC: <200ppm 196ppm Pass
^ 0.97-1.03 0.853 Fail
Nutural Idle
Speed 690-990 804 Pass
CO: <0.50% 8.60% Fail
As you can see my CO levels are way up...
Any ideas where I should start looking to find and fix the fault?
signed...... Desperate in Poole.
Who the f**K tightened this up!
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DorsetStrider
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| posted on 15/2/07 at 05:59 PM |
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As always any help/advise VERY gratefully received.
Who the f**K tightened this up!
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PeterW
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| posted on 15/2/07 at 06:01 PM |
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Quick questions...
What car...??
Engine...?? Carb or Injection
Age..??
Cheers
Pete
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DorsetStrider
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| posted on 15/2/07 at 06:04 PM |
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opppps would help wouldn't it?
It's a Seat Ibiza Chill 1.4
Engine is multi point injection (VW engine code is AUD)
51 reg so about 4.5 years old. Only done 40k miles
Who the f**K tightened this up!
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Duncan_P
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| posted on 15/2/07 at 06:15 PM |
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Your failing by quite a bit.....
My tintop did similar last year, was a combination of dodgey plug (incompetant citreon mechanics bodging), dodgey temp sensor and also a dodgey coil
pack (but i didnt fix that).
Mine went from 10x over to barely registering
[Edited on 15/2/07 by Duncan_P]
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zxrlocost
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| posted on 15/2/07 at 06:17 PM |
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I have had exactly the same kind of readings on my rover vvc last week
wiring fault and lamda sensor
check wiring
wd40 all electrical plugs
fit a new lamda
your oil is probably full of emissions to which will take the C/O up still once youve fixed it so chage the oil with a flush etc
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speedyxjs
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| posted on 15/2/07 at 06:17 PM |
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I cant help you with your emissions problem but i do know that before an MOT, if you run you tank right down and then fill it up with any of the super
unleaded fuels, it reduces the emissions.
This might help a bit.
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bigrich
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| posted on 15/2/07 at 06:19 PM |
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looks like an oxygen sensor fault from the readings (lambda sensor)
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theconrodkid
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| posted on 15/2/07 at 06:25 PM |
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looks like lambada gone west,it engine reaching full temp?what colour are the plugs?
who cares who wins
pass the pork pies
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miegru
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| posted on 15/2/07 at 06:27 PM |
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It sounds like the ecu is running in safe mode (when some sensors brake the ecu will go to safe mode; i.e. more fuel in order to avoid the engine
overheating).
I suggest you to go to a Seat dealer. They can read the ecu and tell you if there is a problem with a sensor.
With that knowledge you can go hunt for a cheap replacement and install it yourself.
I know that there are kits on the internet that make it possible to read your ecu on a standard laptop. Don't know the cost though and I have
never worked with them.
If the cat is broken; try to borrow one from somebody with a similar car.
Good luck!
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rusty nuts
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| posted on 15/2/07 at 07:11 PM |
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Had more than a few VWs with faulty coolant temperature sensors, ECU goes onto limp home mode. Also check coolant level and temperature as low coolant
level can cause problems . Would have thought the high hydrocarbons are caused by the rich mixture rather than a missfire .
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DorsetStrider
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| posted on 15/2/07 at 09:14 PM |
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It's not misfiring.
But I can rev over 3000 fine.... I was under the impression that in limp home mode it wouldn't let you rev over 3000?
I do have two intermittent faults on the car....
1) SOMETIMES when it's cold I start the engine and it starts fine.... but then stalls immediately, wont idle. This tends to go away when the
engine has warmed up.
2) The water temp gauge on the dash should stay at 90.... but more often than not wont register any temp at all. Sometimes it does go up to 90 then
when I look again a little while later it's back at 60 (the lowest setting on the dial)
Don't know if either of these would give some clue as to the reasons behind the dodgy emissions thou?
Who the f**K tightened this up!
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t.j.
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| posted on 15/2/07 at 11:21 PM |
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First check for vacuum-hoses which are broken.
They can cause such results.
Grtz Theo
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C10CoryM
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| posted on 16/2/07 at 03:15 AM |
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High CO means you are running rich.
High HC means you have misfire.
Assuming things there are the same as here, you should only be putting out 0.5% CO BEFORE the cat, and virtually 0% after. So we know that you are
running rich, thats step 1 to correct. Common things that can cause over fueling are: Faulty O2, faulty CTS, dripping injectors, faulty fuel press
reg.
You will need to figure out why you are dumping too much fuel in before you try emmisions again. The next step would be to find out whether the
computer is commanding the un-needed fuel, or if its a mechanical failure.
Cheers.
"Our watchword evermore shall be: The Maple Leaf Forever!"
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britishtrident
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| posted on 16/2/07 at 07:24 AM |
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It is running open loop -- usual suspects coolant temperature sensor,lambda sensor. It could even be something as simple as the thermostat stuck
open.
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