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[Hondaboy]

Bit of an odd one here first drive after installing big air filter (as seen below if my link to pic worked)
What a lovely noise though still quiet when driven gently
Anyway once engine had warmed up I floored it which led to loads of noise but massively down on power then eml light started flashing then stayed on permanently, got stopped at lights and car was juddering at idle misfire I think
Limped it home shut it down and popped bonnet all seemed fine restarted engine no eml no misfire
I’m confused maf sensor not happy? Or unrelated problem occurring randomly?
Car runs and drives beautifully till now anyone else had issues with same?

[addy]

Just my thoughts. But you are dragging warm air in, from around the engine, which is a massive heat source. Warm air is not what you want. Cold air is better for performance. Probably the ECU is backing everything off, because it sees lots of warm air.  That is why intercoolers are used, cools air down. More cold air, more bang in engine = more power.

So you have made the engine power etc. worse by doing the conversion.

Someone will be along soon, to hopefully explain more.

[Lizzie Zoom]

Maybe I am missing something on this, but why would you fit a "big air filter" to a 2.6 Omega with a standard engine?

It was designed to have the air filter as fitted in the factory, so why do a boy racer up date?

If you go back to the original design I am sure your troubles will be over

[addy]

Agreed Lizzie Zoom. The air intake system for the engine, from stock works great. If it isn't would be checking all pipework to the Rams front and back.

[LC0112G]

Did you measure the ambient air pressure, and the air pressure in the standard air box after the standard panel filter, before you binned it? That way you would know how much of a restriction the standard setup imposes.

No? Thought not.

The only thing a performance air filter will do on an Omega is allow more/larger particles through, leading to increased engine wear. And it'll allow hotter engine bay air into the manifold, rather than cooler external air, thus reducing performance.

If these things had any real world benefits, manufacturers would fit them as standard.

[Doctor Gollum]

Two things...

1. The air filter... Aside from the previous observations, is it oiled? If yes, then you might have killed the MAF.

2. Fuel/historic use. If you're running crap fuel then that can make the EML flash. Likewise, if the car has been babied, then the sudden change of use won't agree with the established parameters in the ecu.

Firstly, refit the standard filter/housing.

Secondly, get the codes read* and report back.

* pedal trick may or may not work, but it's a start

[Rangie]

Maybe I am missing something on this, but why would you fit a "big air filter" to a 2.6 Omega with a standard engine?

It was designed to have the air filter as fitted in the factory, so why do a boy racer up date?

If you go back to the original design I am sure your troubles will be over

. 


Got to agree Lizzie, much better to keep the vehicle as built.

[Hondaboy]

Thanks for the advice from the helpful members I’m going to refit the original box and filter and go for a run
Hopefully will be back to normal which was brilliant anyway

Filter wasn’t oiled so hope maf is ok
Only used super unleaded since I got it

As for why modify my car well because I can and I like to but if you have to ask that question then your not going to get it  all cars are manufactured to a budget and fuel economy targets and several cars I’ve owned have benefitted from intake and exhaust improvements and several threads on this forum have discussed improvements from such
If this car doesn’t benefit from modifications I’m happy to just maintain polish and enjoy

[Rangie]

They are lovely vehicles kept stock, good ones are few & far between now enjoy it.

[Doctor Gollum]

Some mods are worth making, and the Omega benefits from these, but others less so. Cone air filters definitely fall into the 'less so' category.

Familiarise yourself with the 'pedal trick' and see what codes pop up these will help point you, and us, in the right direction re what might be the cause and therefore solution

Flashing eml is generally a tempory item, but depending on the cause, can become a solid eml if the car continues to be unhappy 

[Raeturbo]

If you want to improve airflow, do some research on aftermarket performance panel filters such as K&N, it will fit straight in as the standard item and benefit from the cold air feed already built into the original system.

[iansoutham]

People never do proper research.

I remember years ago when they did the test on air filters in the Escort Cosworth. They tried standard filter, panel filter and cone filter.

Below 400bhp, the best one was the panel filter in the standard air box. This was all on a car with almost twice the original power.

I run K&N filters in some of my cars as it works out cheaper to clean and re-oil than to change all the time. Anything with a MAF stays on original filters

Again, as said earlier, over-oiled filters with a hot at MAF will become expensive.

[Doctor Gollum]

GM filters are hardly expensive.

[Nick W]

The K&N's real advantage is that its performance doesn't deteriorate as it gets dirty. That's both airflow and filtering performance, which isn't true of a paper filter. It's more efficient, so flows a lot more air for the same size which makes one really useful for applications that are short of space.


A disadvantage is they achieve that largely through the oil that has to be applied. If you don't oil it, it will barely filter anything. They don't need a lot of oil though; a new one won't feel oily nor will a cleaned one if you follow the instructions.



If the car already has a filter that fits the space and flows enough air then a 'performance' filter is a waste of money. Although if you like the extra noise, that's a good enough reason to fit one if you can live with potential MAF failures.

[Andy B]

All V6 engines breathe through the same size panel filter .... if it's good enough for a 3.0/3.2, it'll be good enough for a 2.6