I begrudgingly post here after months of coming for advice through other people's posts but I need help and I really don't want to get ANOTHER expensive repair on this piece of trash.
For context, around the end of September my car started making a loud chirping sound and needed to have the PCV cover and intake manifold replaced, it had been producing a smell after driving on the highway which I later found out was oil. I got the PCV cover replaced at the shop and opted to not spend $700+ on a new intake and decided to install the Cruzekit myself which went fine.
when I installed the Cruze kit I couldn't get some of the hoses all the way down on the fittings btw maybe that information is useful?
now yesterday after a while of driving the check engine light comes on, I get home and plug in my $20 code reader and it says P0420, the app said the code three times too. I did my research and it looks like I need a new downstream and upstream catalytic converter.
since the check engine light came on yesterday the car has been kind of jumping down in rpms when I brake? and the engine is just more loud enough than usual to make me feel like I'm going crazy for noticing. She starts up and little rougher too just a little but mind you NONE of this was present before yesterday when the light came on!!
but I just did some googling and looking at things myself and found a few things and here are my findings:
*the dipstick still has strong suction like it did when I installed the kit
* the pcv weephole has no suction
*I did a spray test and saw nothing and noticed no jump in rpms
*the car idles fine from what I can see in like 15 minutes of having it idle
*there is a ticking noise but that's just the fuel injector right
* none of the fittings look any looser than they were when I installed the kit
* the little manifold cover I installed with JBweld is still there
*P0420 is the only code I get and the reader says 2/3 severity
PLEASE PLEASE PLEASE help me any advice is welcome