Car won't accelerate for anything... HELP

[kms1990]

Um.. You have a nonfouler on your primary O2 sensor? Your primary O2 sits before your primary cat just after the exhaust manifold. You only want a nonfouler on your secondary O2 that normally would sit after the secondary cat, about half way down your exhaust.

If you have a nonfouler on your primary O2 without using a wideband or something else for AFR, your car will not work properly unless it is in open loop, such as when it is warming up.

In short, take the nonfouler off of your primary O2 and put it on your secondary O2.

thanks for the correction there. i thought both o2 sensors got non foulers in his situation, as he is running no cats at all.

 

[Willis2k]

Um.. You have a nonfouler on your primary O2 sensor? Your primary O2 sits before your primary cat just after the exhaust manifold. You only want a nonfouler on your secondary O2 that normally would sit after the secondary cat, about half way down your exhaust.

If you have a nonfouler on your primary O2 without using a wideband or something else for AFR, your car will not work properly unless it is in open loop, such as when it is warming up.

In short, take the nonfouler off of your primary O2 and put it on your secondary O2.

Ok, awesome. Thanks for clearing that up for me. I had searched for threads on how to use a non fouler on the o2 sensors and which sensor to put it on, but all I found was put it on "the sensor" so I just assumed they meant the upstream. I didn't want to be the guy starting the 6468232927390137th thread on that topic.

 

[thuzil]

Nope. The primary O2 is always before any cat and is there to aid the ECU in calculating the proper AFR. No cats, only nonfouler on the secondary O2.

Or shameless self advertising, I make an O2 simulator that you just plug into the secondary O2 harness in your engine bay to completely eliminate the need for the secondary O2. It simulates the O2 signal and the heater as well.

 

[Willis2k]

Nope. The primary O2 is always before any cat and is there to aid the ECU in calculating the proper AFR. No cats, only nonfouler on the secondary O2.

Or shameless self advertising, I make an O2 simulator that you just plug into the secondary O2 harness in your engine bay to completely eliminate the need for the secondary O2. It simulates the O2 signal and the heater as well.

Can you PM me details about that simulator? I might be more interested in simulating that secondary O2 sensor more than ghetto rigging the existing one.

 

[MaxPower]

That accordion tube is $30 to your door from either rockauto.com or scamazon. Interesting that it caused an intermittent (vs. a consistent) problem.

 

[Willis2k]

The problem has been so hit or miss that I can't even take it to a mechanic to see if they find the issue. I've ordered some new engine mounts (mine are totally shot) and will be getting a new intake tube in a week or so. I'm hoping the hole in that tube and my incompetent installation of the non foulers on the wrong O2 sensor are the only issues I have.

 

[mp51987]

i believe both require non foulers when no cat is present. and yeah i wonder too, the only thing i can think of is the strut bar that runs right over it gets hot and heats the rubber so continued heating and cooling cause it to break. mine ripped right near where it goes by the strut bar.

Sorry im a newb. But what are foulers? I have an mp5 with a 4-1 header on it no cats but both o2s. And my check engine light keeps comeing on ramdomly. Any suggestion.

 

[pcb]

Here's a link to the non-fouler (there's an electronic one as well),...

http://www.mazdas247.com/forum/show...ure-Cel-Mil-from-removing-cat-with-Non-Fouler

EDIT: the electronic link,...

http://www.mazdas247.com/forum/showthread.php?52498-How-TO-CEL-MIL-Eliminator!

 

[mp51987]

Thats funny. After i posted that i googled it and found that thread lol. I have a 4-1 header. Would doing the non fouler thing help with rough idle and gas milage?

 

[pcb]

Would doing the non fouler thing help with rough idle and gas milage?

Yes,... when that CEL is on, the ECU goes into limp mode and floods the engine with extra gas.