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kevin 12

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PostSubject: Emissions help New nct report   Tue Apr 14, 2015 10:54 am

Well lads put car in for test and only failed on emissions, anyone able to shine some light on what could be wrong? Car got new leads will be getting new plugs this evening. Doubt they will make much of a difference to emissions though. This is the fail sheet to give guide on how emissions check went. Anyone ever have similar results. Engine is 4efte with standard ct9 and blitz ecu and has a civic cat bolted in which should be ok. Cant use original cat.
Retest is fairly soon so any help be greatly appreciated


Last edited by kevin 12 on Mon Apr 20, 2015 10:57 am; edited 2 times in total
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richardc9052
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PostSubject: Re: Emissions help New nct report   Tue Apr 14, 2015 11:00 am

Why cant you use original cat? How far back from the turbo is the civic cat? Is it spurious or oem?

If the cat is too far back it wont do its job in a turbo car. If its spurious n/a cat it definately wont do its job in a turbo car.

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kevin 12

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PostSubject: Re: Emissions help New nct report   Tue Apr 14, 2015 11:28 am

The original cat couldnt be used due to the subframe in the corolla being in the way so custom downpipe was made up where cat normally bolts on. The cat is bolted in in the original corolla position. WCP made up the exhaust said that the cat used should be ok. The cat has a 2 1/2 inlet and outlet but not 100% sure on whats it off of.
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PostSubject: Re: Emissions help New nct report   Tue Apr 14, 2015 11:36 am

seeing as you passed fairly ok on hydrocarbons i'd say the cat could be ok. low lambda and high co reading would indicate it's running rich, i wonder would swapping back to the standard ecu get it passed? what do the plugs look like? black?
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PostSubject: Re: Emissions help New nct report   Tue Apr 14, 2015 11:42 am

I'd agree the blitz ecu would be running Rich I'd imagine an be a help to change sparks plugs
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kevin 12

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PostSubject: Re: Emissions help New nct report   Tue Apr 14, 2015 11:55 am

Car is running rich alright id say gives an odd pop when coming down the revs at around 1.5k to 2k revs. Il take plugs out this evening and have a look. Iv new iridium plugs that were delivered yesterday evening so can fit them to while im at it.
Would standard ecu be recommended over these ecus for test ya? Would it be possible that just running rich upset them that much?
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PostSubject: Re: Emissions help New nct report   Tue Apr 14, 2015 11:57 am

kevin 12 wrote:
Would it be possible that just running rich upset them that much?

i'd say so. your fail isn't too bad, just a little out. i've seen wayyyy worse posted up here before.
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kevin 12

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PostSubject: Re: Emissions help New nct report   Tue Apr 14, 2015 12:02 pm

Il chance have a look at plugs this evening and see what condition there in and throw in standard ecu aswel. Hopefully some place will be able to test emissions before retest.
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PostSubject: Re: Emissions help New nct report   Tue Apr 14, 2015 12:31 pm

she running rich lawd, john can do emmissions, set mine perfect on the dyno
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kevin 12

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PostSubject: Re: Emissions help New nct report   Tue Apr 14, 2015 12:50 pm

Was onto him a few times since test and he still cant book me in for an evening on the dyno, id say his up the walls these days.
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PostSubject: Re: Emissions help New nct report   Wed Apr 15, 2015 10:59 am


Removed plugs last night and swapped them out for ngk iridium plugs.
Would anything here indicate overfuelling etc?
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PostSubject: Re: Emissions help New nct report   Thu Apr 16, 2015 2:07 am

plugs look fine.. id put back in the stock ECU for the test, try get it pre tested to see what its like with stock ECU
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Foggy
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PostSubject: Re: Emissions help New nct report   Thu Apr 16, 2015 2:34 am

Ecu is the issue I'd say. Also check if your running std injectors .
The fact the exhaust pops and bangs with a cat in I'd safely say it's over fueling. The ecu might not suit your setup
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kevin 12

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PostSubject: Re: Emissions help New nct report   Thu Apr 16, 2015 10:07 am

Thanks lads. I should hopefully be able to get it checked this evening. I also changed a gasket from turbo to downpipe there two evenings ago aswel so hopefully now all going well it'll be ok.
Running rich is most likely the problem so going by emissions test?

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PostSubject: Re: Emissions help New nct report   Thu Apr 16, 2015 12:30 pm

Pops and bangs can be caused by it running lean when you leave off the throttle also so dont take that as a definite as it may not be running rich. Plugs look grand though.
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PostSubject: Re: Emissions help New nct report   Sat Apr 18, 2015 8:12 am

I know this is off topic but I m cracking up I drive a standard 1.3 Corolla and put it in for test three weeks ago it failed on low idle CO mine was 6% and should less than 0.5% brought car to my mechanic and he said it was more then likely my exhaust but to throw dipteine in with petrol for retest and should pass. So on I go yesterday back for retest and the emissions is still 3% lad in nct centre said its the cat? Does anyone else have any ideas? Car was serviced in February and plugs and leads were changed for first time in bout a year, exhaust is a bit shook but my father is a metal fabricator and has it mended well so no holes or blows.. Any ideas?
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PostSubject: Re: Emissions help New nct report   Sat Apr 18, 2015 9:20 pm

With CO emission being that high the cat is no longer working on your car sara.
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kevin 12

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PostSubject: Re: Emissions help New nct report   Mon Apr 20, 2015 11:10 am

Well lads car went threw nct there on Saturday. I changed back to standard ecu for it and car has now passed on the lambda readings but has failed on the co's on both high and low idle.
The tester warmed it up a nice bit to before testing.
Think at low idle it was at .5 and at high idle was at 1.77. i dont have fail sheet on me at the moment but think that what it was. The lambda reading was .98

The way the engine is out of a pre 95 car could i get emissions tested at the different rate or do they go by the reg of the car?
Lambda reading was .98 so if i managed to lean it out a small bit would this help?
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PostSubject: Re: Emissions help New nct report   Mon Apr 20, 2015 11:30 am

well if your car is still a normal corolla on the book and you haven't said anything about the turbo dont say anything to nct fellas about it and since car isnt a 95 body they wont change the way they test it i say
Did you try diptane and run with it in the system for a few weeks? and give the car a good driving down to center i never relay on testers to warm car up sure there told to get as many retests as they can now
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Foggy
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PostSubject: Re: Emissions help New nct report   Mon Apr 20, 2015 12:47 pm

How far away is the lambda from the cat?
I was told by my tuner before that It has to be as close as possible .
If you look at any car the lambda is right before the cat
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kevin 12

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PostSubject: Re: Emissions help New nct report   Mon Apr 20, 2015 2:15 pm

gtturbo94 wrote:
well if your car is still a normal corolla on the book and you haven't said anything about the turbo dont say anything to nct fellas about it and since car isnt a 95 body they wont change the way they test it i say
Did you try diptane and run with it in the system for a few weeks? and give the car a good driving down to center i never relay on testers to warm car up sure there told to get as many retests as they can now  
I told them They no its a turbo engine thats in the car but didnt say the year car it came out of.
Yup i put in around half bottle diptane a week before the test and drove to the test centre in third gear ha I got an evening slot aswel and said it to the tester. he gave it a nice rev for around 5 minutes after it got up to temperature id it was the same reading i got off another garages tester :/

Foggy wrote:
How far away is the lambda from the cat?
I was told by my tuner before that It has to be as close as possible .
If you look at any car the lambda is right before the cat

Closer to the cat the better so ? it just before the cat alright as far as i remember. il have to double check this evening. WhAT reading should i be getting off the lambda sensor. if i could read this off my own car and compare might help identify the problem
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cannon91
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PostSubject: Re: Emissions help New nct report   Mon Apr 20, 2015 2:46 pm

Now I remember someone off here, fast focus I think, saying that weird emission readings could be down to the timing being off.

Might be something simple as that?
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kevin 12

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PostSubject: Re: Emissions help New nct report   Mon Apr 20, 2015 4:16 pm

Iv got my mechanic to have a look at the timing aswel and it was spot on at 10 degrees. Car isn't burning oil either and is seems to be driving grand. I'm actually puzzled :/
Il try pop in a lambda sensor i have at home and get emissions tested again before retest.
What do the co's actually represent, just unburnt fuel etc? Would it be worth throwing in an octane booster with the petrol?
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PostSubject: Re: Emissions help New nct report   Mon Apr 20, 2015 6:54 pm

kevin 12 wrote:
Iv got my mechanic to have a look at the timing aswel and it was spot on at 10 degrees. Car isn't burning oil either and is seems to be driving grand. I'm actually puzzled :/
Il try pop in a lambda sensor i have at home and get emissions tested again before retest.
What do the co's actually represent, just unburnt fuel etc? Would it be worth throwing in an octane booster with the petrol?

im not sure but I think octane booster could make the readings worse not better..have you checked for vacume leaks..if you have one or more it could compensate and run richer..but id drive a bottle or two of diptane and make sure cars good and hot for when you drive in the nct center...I even heard of guy heatwrapping cats to make them work better to give low co2 reading or using more than one cat every little helps like
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nathan mckeown g6 4-efe!!
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PostSubject: Re: Emissions help New nct report   Mon Apr 20, 2015 7:03 pm

go into your auto factors and ask about BG stuff its a brand that does all engine flush kits ment to be serious stuff im gettin rolla done satday along with the gearbox cleans the rings and builds back up compression nd stuff all different ones you can get Smile
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PostSubject: Re: Emissions help New nct report   Mon Apr 20, 2015 7:27 pm

Mine was similiar ,put standard cat in and the readings dropped right down
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PostSubject: Re: Emissions help New nct report   Mon Apr 20, 2015 7:37 pm

.ep82. wrote:
Mine was similiar ,put standard cat in and the readings dropped right down

I bet you lambda sensor was a good bit away from the cat?
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PostSubject: Re: Emissions help New nct report   Mon Apr 20, 2015 7:53 pm

Its overfueling.
Catalist is doing job, but there is to much fuel.
Put standart ecu and test it again.
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PostSubject: Re: Emissions help New nct report   Mon Apr 20, 2015 8:34 pm

Foggy wrote:
.ep82. wrote:
Mine was similiar ,put standard cat in and the readings dropped right down

I bet you lambda sensor was a good bit away from the cat?
Ye was good bit away
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PostSubject: Re: Emissions help New nct report   Mon Apr 20, 2015 8:47 pm

kevin 12 wrote:
Iv got my mechanic to have a look at the timing aswel and it was spot on at 10 degrees. Car isn't burning oil either and is seems to be driving grand. I'm actually puzzled :/
Il try pop in a lambda sensor i have at home and get emissions tested again before retest.
What do the co's actually represent, just unburnt fuel etc? Would it be worth throwing in an octane booster with the petrol?
Main reason they would be high is unburnt fuel. Most likely over fueling. The plugs look fine but they probably aren't in long enough to show signs of overfueling. You could also try additives to help clear out the carbon deposits built up.
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