tpy1879

I'm having issues with my 2005 Acura TL some help and advice would be great. I took it 2 autozone and had them plug the OBD in and it read that I have issues with A/F ratio concern, Air leak near HO2s (Heated Oxygen Sensor) Bank 1, Ignition system concern, and Faulty catalytic converter. The guy said all I need is to run a fuel cleaner through the vehicle, if so what kind, but I would like a 2nd opinion on that. Any help would be greatly appreciatied, Thanks.

Turbonut

iTrader: (1)

What was the code(s)?

spaceboy

then try a fuel cleaner first, that seems to be the cheapest solution for now

tpy1879

Don't know the codes cuz i don't think they give them to ya but they print out a recipt telling u what the ODB detected which was what I stated in the first message.

tpy1879

Is there a certain brand I should use? I know not to use cheap priced ones cuz I heard those are not good. Let me know if u have any suggestions

tpy1879

what's a good fuel cleaner, u know of any? Let know thanks

spaceboy

i used to put this in my old car..like once a year

didn't put it in my TL since i thought i have been feeding it 91 Premium already

tpy1879

yeah, I know, I use super premium which is 93 so I'm puzzeled at why I would need a fuel cleaner plus I just gave it a tune up 4 months ago, new coil packs, new spark plugs, I mean what next, mayb the sensors just bad

spaceboy

TBH, i don't think that autozone guy know what he was talking about, i personally don't believe just a bottle of fuel cleaner can solve all the problems he detected.....

try your best to get the codes if you can so we can help u out

tpy1879

yeah, I agree, I'll get back to ya when I get the codes Thanks man

spaceboy

good luck, keep us updated....i also have a 05 TL so i kinda wanna know too

csmeance

all of these issues are tied to 1 thing, the O2 sensor before the catalyst. Go back to autozone and ask them for the OBDII codes and not the description.

As far as a fuel cleaner goes, all 93 octane is not made equal! First off the government has mandated 10% ethanol in our gas which is a nightmare for cars. It causes buildup, rust, etc in our fuel systems.

I use Redline SI-1 Fuel cleaner in all of my cars now because of the ethanol in gas and it helps quite a bit. On my 760 I have to use it after every 2-3 tanks of gas otherwise the fuel system will go crazy!

tpy1879

Got the code P0420

tpy1879

The code is P0420, let me know what u think

Turbonut

iTrader: (1)

First, replace the rear O2 sensor bank 1, firewall side.

https://acurazine.com/forums/3g-tl-problems-fixes-114/check-engine-light-p0420-746712/

Quickly found some info online:
http://www.p0420.com/

Fry Stl

p0420 is the kiss of death to a cat. converter. more than likely before you did your plugs and coils, i'll make the assumption that the car was misfiring. misfires kill converters. probably weakened it, then you put all that jazz on, but the damage was already done. need to replace converter and downstream o2. putting snake oil fuel system cleaner in your gas tank for a converter will do nothing but take $15-$20 out of your bank account.