Car repairs. Any advice?
My acura is getting old…275000 miles so its understandable if it needs a bit of this and a bit of that.
current list of woes include an aircon that works only until it gets hot, then it stops…
And for about 4 years now the check engine light has been on for a P0420 cat low efficiency light. But the car has been driving fine except I need to clear the codes and then drive around until the sensors get active and quickly get the car smogged . Cars five years and older need a smog test every 2 years here in cAlif.
SO i’ve done that for the last two smog checks and the car has passed so the nox cant be that bad. It would’nt have passed if the NOX was bad. But recently sprung another code which means the knock sensor is on the blink so I found that was quite cheap to buy like 50 bucks or so and hope my mechanic next door at the gas station wont charge me too much to put that in. IF i could reach it I can do it easily.
no knock sensor means have to use Premium and there is a smell of gas meaning probably too rich a mixture.
So been doing a bit of reading up on ox sensors and all that trying to make sure its not my ox sensors acting up. Basically trying to avoid having to change the cat.
We cant order non calif cats in calif. And calif cats are like 1500 dollars while cats for other states (which is good enough to stop the check engine light) runs maybe 600. I am hatching a plan to drive the car to reno and have the cat replaced there !! It will pass smog here in calif ! I can also find some shade tree mechanic here that will charge that to install a non calif cat in calif, which i guess may not be totally legit, but better than running a straight pipe which is totally not legit.
straight pipe wont kill the check engine light though.
So in my readings and attempt to make sure its not the ox sensors and it really is my cat…im not sure what im seeing on the code reader is good or what?
I understand the ox sensor fuel ratio should flux a lot for sensor 1 prior to cat and be steady at as close to 0.45 as possible on ox sensor 2 which is after the cat??
Mine seems to do that, so assuming the ox sensors are ok? Which means perhaps the cat really is bad?
OR, I finally decided to replace the plastic cover for the air filter. There is a small nozzle that connects to a hose that connects to the top part of the engine. While most of the air intake goes to another part of the engine. NOt sure what this nozzle does , why does air need to be supplied to the top of the pistons?? Any mechanics? Well basically this has been broken for years. I thought nothing of it, but air apparently has been leaking into the top part of the engine, which i thought nothing of as its an air intake anyway right? And i guess its sealed to prevent stuff other than air coming into the top part of the engine?
But thinking maybe that has something to do with check engine light i ordered a new part. 113 dollars later at the acura store. it comes in a few days, I wil install it and see if it makes the p0420 light go away? will be great if it does !! I think the knock sensor probably is bad though as i have had driveability issues recently. Which the p0420 condition did not result in.
any mechanics want to explain what is what to a person who really shouldnt be repairing his own car but wants to save DINERO.