mini o2 cat to fix P0420...what do u guys think

[life602]

So I have p0420 code on my car and there is no intake leaks and spark and all that is well.so it might be by cat but I just dont have the tools to trouble shoot it so by doing research I found this.
http://www.bigdaddiesgarage.com/mini-cat-cel-fix.html
Its an adaption that goes on the o2 censor Which is then hooked up to the cat..they cost $50 a pop.the question is how do I get the right size/which do I get? And how much bulk is going to add to the o2 censor, is there going to be enough space for this to fit under the car? I found the product on this site http://www.justanswer.com/nissan-infini ... ensor.html

So let me know what y'all think before I get two of these (I have a bank1 and bank2),and if they are worth the time and money guys..another thing I'm also suspecting is that the code might be coming on do to a clogged fuel filter or weak fuel pump because I have noticed the light comes on when u brake some what hard and the accelerate the car and the car like spuddles and the light comes on...Is there an easy way to check this with out a pressure gauge I really dont want to have to change the filter unless I have to since its in the gas tank and if so I rather save so I can swap the fuel pump...

[willko1]

So I have p0420 code on my car and there is no intake leaks and spark and all that is well.so it might be by cat but I just dont have the tools to trouble shoot it so by doing research I found this.
http://www.bigdaddiesgarage.com/mini-cat-cel-fix.html
Its an adaption that goes on the o2 censor Which is then hooked up to the cat..they cost $50 a pop.the question is how do I get the right size/which do I get? And how much bulk is going to add to the o2 censor, is there going to be enough space for this to fit under the car? I found the product on this site http://www.justanswer.com/nissan-infini ... ensor.html

So let me know what y'all think before I get two of these (I have a bank1 and bank2),and if they are worth the time and money guys..another thing I'm also suspecting is that the code might be coming on do to a clogged fuel filter or weak fuel pump because I have noticed the light comes on when u brake some what hard and the accelerate the car and the car like spuddles and the light comes on...Is there an easy way to check this with out a pressure gauge I really dont want to have to change the filter unless I have to since its in the gas tank and if so I rather save so I can swap the fuel pump...

did you ever do this what was the result??

[elwesso]

I don't think the cats are really that suspect to failure on these cars.

Correct me if I'm wrong, but out in AZ you have emissions testing, right? If that's the case, then those little "o2 sensors cats" will not make the car pass emissions, because if the cat is still working improperly.

Seeing how you say the car sometimes sputters and whatnot, that is probably the cause because the engine is misfiring or something like that. Is that the only code you got? On those cars the fuel filter is non-serviceable, so I don't suspect you have any issues with that. I would check the fuel pressure, there's really no way of doing it without a pressure gauge.

Check out page 48:

http://www.nicoclub.com/FSM/Q45/2002_Q4 ... Q45/ec.pdf

Unlike what the FSM says, I would replace the fuel pump before I replaced the fuel pressure regulator. If you don't have a pressure gauge then I'd suggest you just take it to a shop, based on that procedure I wouldn't think it would take more than about an hour. If you don't get the 42psi when you turn the ignition on, I'd replace the pump.

From what I've seen you should be able to get pumps for about $150 and a fuel filter for under $20.

[life602]

Thanx for the info, to start off with but that the only codes(P0420) that pops up in bank1,and bank2(2codes).funny thing is that I pass emission last time I took it thru and the code had also been on then ( I just cleared the code and it pops back on after 20-40miles).I think I'm going to save up for a pressure gauge and check the pressure in the line.since you mention it could be a spark problem last time I changed the sparkplugs I didnt replace any of the plugs/coils because I thought they where well but I'm sure they could be the original parts and the car had like 120k now so it might be time and I replaced the spark plugs and I changed the plugs at 100k with original plugs.I also took a look at the location of the fuel pump on the manual but not how to remove it and it looks like the pump and the filter are sold separate but come togather as a unit that drops into the tank..another funny thing is that the car started not to want to turn on at times and for some reason some times I go to the back of the car and push down on it a couple times and then the car starts..not to mention I also have to replace the inner tie rod on both sides know and I can't find it on the manual( I just find how to replace the rack)and I dont have the tool to unbolt it...FML.thanks for the info I will do that as soon as I get a gauge and as for the mini cats I thinks its a good idea u just have to make sure the O2 sensor is still going to clear all the little surrounding areas of the chassis..if any one trys it post a review I'm quite interested on this product.