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4th September 2018, 17:08 | #1 |
Posted a thing or two
MG ZT-T 2.5V6, Mazda Cx30 Join Date: May 2011
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Bad news today
Hi all, got bad news today my car went in for its mot and an oil service plus a couple of other job. My mechanic rang me to say the car failed on a number of things the most shocking was the co2 emissions. He had to put in two bottles of cat clean to get it to pass the test and it did just about. He said that it might not pass next time. It is an after market stainless system so do I go back to company I bought it from for there advice, but as it has been 2 years not sure what advice they could give. Plus I have had the car remapped so my gut is saying that it might be the cause of the issue because when I got it done the guy said the fuelling was to rich at the top end so brought it back down BUT I did find I could smell it being really rich on start up when I was using premium fuel so could that have an effect on the cat, but now start to us regular and the smell is much less . I also average 3 hours of driving a day mostly at motorway speeds so the cat gets nice and hot. Where do I go from here?
Many thanks Chris.
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Ugly Duckling |
4th September 2018, 17:17 | #2 |
SERVICING AND DEALER DIAGNOSTICS
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Where was it remapped mate Is it a mafless remap
Mick
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4th September 2018, 17:23 | #3 |
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I have the petrol v6. Even the re map is nearly 2 years old as well.
http://dynamic-ecu-tuning.co.uk/ Used this company.
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Ugly Duckling Last edited by charlie 22; 4th September 2018 at 17:38.. |
4th September 2018, 17:46 | #4 |
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Well Chris, here are my suggestions:
If unburnt fuel has been entering your catalytic converter then you might have to renew it. Simon
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4th September 2018, 18:18 | #5 |
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Will a t4 session return the car to factory settings.
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4th September 2018, 18:23 | #6 |
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Yes the original tune can usually be re-applied using T4
Russ
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4th September 2018, 20:13 | #7 |
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Given where you live Charlie, it's a shame I don't still work on Walmgate Road as I could have sorted this out over a cup of coffee..........
However I do know a man who is not a million miles from you who could assist, and if you would like me to pass on your number, drop me a PM Brian |
5th September 2018, 10:29 | #8 |
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A big thankyou to everyone for your quick and helpful replies. Things were very frosty at home all evening between the miss and myself over the car. At least there is light at the end of the tunnel to save money, before I have to throw more money to fix the problem.
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7th September 2018, 06:41 | #9 |
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Lets just check some other bits before jumping to conclusions.
Engines run rich on startup so as to combat fuel vaporisation and condensation issues. If it's still rich after a couple of minutes then check for Lambda sensor issues (Sensor 1) , this sensor should adjust the fuel back to Lambda 1. If it doesn't then it could be... 1) Sensor has failed/too old and tired to correct mixture properly 2) There's a combustion issue. An incomplete combustion could read lean (due to excess air in the exhaust gas) so the ECU adds fuel to fix this "lean" problem hence a rich smell. |
7th September 2018, 07:28 | #10 | |
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Quote:
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Cheers. Rich… |
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