Lacozcorby
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did you just blank it without telling anything to ECU ???
I went to an local tuner to turn off the EGRLacozcorby said:did you just blank it without telling anything to ECU ???
Im asking this purely for information, why were egrs fitted to begin with, what was the thought behind them, is it purely emmision reduction?F6HAD said:A professionally calibrated remap correctly closes the EGR loop and ensures only maf air is being requested.
And with respect, I know exactly how an EGR works I spend enough time working on them. There are certain vehicles where I actually advise against switching an EGR OFF such as the small turbo 1.9 PD (105bhp) vw engines as they need EGR to relieve excess turbo pressures and closing can reduce the life of the turbo.
However the honda benefits greatly from an EGR OFF if done correctly.
Anybody can read a wiki page and think they've got all the answers.
I think I've seen you say that before Fahad, but in the interests of pedantism, the aim is to reduce combustion temperature under specific load conditions (in the official emission test driving cycle). By reducing combustion temperature, the amount of NOx is reduced.F6HAD said:The aim is to recycle unburnt gasses.
well I do say in #37 "thereby reducing NOx (on a diesel engine), and reducing the danger of knock (on a petrol engine)"F6HAD said:You're mixing a lot of things up there mate. EGR on a petrol and diesel serve different purposes and implementation of EGR varies between manufacturers and models.
I'm not sure why you say "recirculating dirty exhaust gasses to cool inlet temps and thereby reducing nox" , it doesn't matter whether the exhuast is "dirty" or not, and it's not to cool inlet temps, it's to reduce the amount of O2 in the combustion chamber when the burn takes place, which reduces the production of NOx. There is basically less O2 in the exhaust gas which is why it is recirculated, thereby reducing the amount of O2 in the combustion chamber.F6HAD said:In any case yes the ultimate aim is to reduce emissions, and how it does that is by recirculating dirty exhaust gasses to cool inlet temps and thereby reducing nox.
There is no doubt that when a car leaves the factory it meets the emission specs that it is designed for (unless it was using the infamous "cheat" code) but yes, after then, it's downhill all the way as far as emissions are concerned and EGR on a diesel can actually accelerate the deterioration of other factors that will cause an increase in emissions and decrease in power and mpg.F6HAD said:They can't make a Diesel engine 'clean' so they have to try and reduce the volume of harmful gasses and particulates that are emitted.
I wish they would spend time and money checking cars that are 24+ months old and ***ess them for their real world emissions. It would be clear how real world conditions are completely different from a brand new car in a lab.
I accept your point however, an EGR's function may be to recycle exhaust gasses but it's purpose is to reduce emissions.
what year is your car ?DiD said:So that error means that it stays open more than it should?
2004freddofrog said:what year is your car ?