cchant

Unfortunately it was while I was changing the fuel filter that I discovered the hole in the resonator haha. All I can say is that is the worst location ever for a fuel filter.

xyzragon, that is exactly what I am going to do. Thanks for the picture!

asidreflex

I did a battery/intake swap and when I removed the resonator it was ridiculously loud, So I just went to autozone, bought a 3/4 inch rubber cap and capped it off, no filter, nothing, and eveything works fine, it seems to me that worked and I didn't need to put a filter on it at all. Luckily we have no emissions here.

abecedarian

Well, everything isn't working fine. All you did was prevent the PAIR system from working properly since it isn't getting fresh air. This can cause the O2 sensor to read a slightly rich condition under cruise / constant engine speed since the PAIR system isn't allowing air into the exhaust and and this can cause the fuel mix to go leaner than it should.

toyota4x4907

Just because you dont have emission testing doesnt mean you should disregard the emissions output of your vehicle. The PAIR system introduces clean air into the exhaust BEFORE the o2 sensor, so its likely you will run "rich", according to the o2 sensor input to the ECU. The ECU will tell the fuel pump to not pump so much gas, so your power will probably decrease.Also, MPG will probably suffer and its possible to burn out the cat faster, if you still have one on.

Edit: Abe beat me to it . I should quit multitasking.

asidreflex

Hmm, both of you have good points, I am going to get rid of my cat as soon as I do my exhaust, but what I am worried about is if I just put a filter on it, wouldn't it still be loud as hell, or should I put the resonator back on and then a filter?

abecedarian

lol...
Anyhow, the ECU doesn't tell the fuel pump to pump less gas: the pump moves fuel, and that's all it does regardless of what the ecu says, while the fuel pressure regulator maintains a constant pressure in the fuel rail, allowing excess fuel to return to the tank. The ECU will shorten the pulse to the injectors so they don't stay open as long thus reducing the amount of fuel injected and thus lean the mixture out to compensate for the O2's readings.

toyota4x4907

yes thats what I meant

I actually didn't know that ...er I didnt know that the ECU doesnt tell the fuel pump to pump a certain amount of gas. it just pumps. I knew about the injectors. it makes sense