Car bogs out in every gear

[j0natell0]

all of a sudden my car threw a code of p0420 Catalyst System Efficiency Below Threshold (Bank 1) and two codes for an o2 sensor. I checked for exhaust leaks, none. Im not sure if the catalyst could be clogged? it drives fine but when u try to mush on the gas it bogs but when stepping on the gas pedal lightly it will drive normal? Whats the deal? Btw: there is a little smell coming out, i remember that smell when i put the new cat in a few months ago.

[D3UC3S]

few months wouldn't be long enough for the cat to go bad....maybe it was defective from the start. What kind of cat did you put on?

[j0natell0]

few months wouldn't be long enough for the cat to go bad....maybe it was defective from the start. What kind of cat did you put on?

some autozone junk. it was brand new though

[project_EM1]

could be misfire check your plugs and wires

[j0natell0]

could be misfire check your plugs and wires

checked that, no codes thrown for that, and listend to the exhaust, sounds steady, no popping

[D3UC3S]

Also check the fuel filter....may be time for a new one since it only does it at WOT.

[Barefoot]

i think your running lean. the smell from the exhaust can u describe it.

[j0natell0]

cleaned out the fuel filter, checked the spark plugs they give out spark, check the timing. its good. i cant really describe the smell. but its still bogging..

[Z0_o6]

I had the same issue with an Integra I bought a few years ago, the cat was indeed clogged. If the engine burns oil, or the A/F mixture is off, added to the fact that it is a cheap aftermarket cat, it will clog up VERY quickly. The easiest way to find out is to just remove the cat and exhaust and test drive the car. It will be very loud, but you are just looking to see if the condition stops. If the car feels a lot stronger (which I'd bet money it will) then you need to replace the cat, and correct the problem that is fouling it in the first place. Like I said, I would look to burning oil because of worn rings or valve stem seals, or both. Try it, it costs nothing but an hour or so. Good luck.

Edit: the smell is also most likely a rotten egg or sulfur smell, which is attributed to the catalyst overheating. If it is severely clogged, you will be able to drive the car and then immediately look at the cat under the car, they can get so hot when clogged they actually glow red! :eek:

[project_EM1]

checked that, no codes thrown for that, and listend to the exhaust, sounds steady, no popping
mine wasnt throwin a code for it either until i replace my cat
does it bogs or does it stutter if it bogs try cleaning your egr
if it stutters check your plugs and wires doesnt hurt to check anyway

[j0nbunklah0m]

cleaned out the fuel filter, checked the spark plugs they give out spark, check the timing. its good. i cant really describe the smell. but its still bogging..

dont forget to mention we hollowed out the cat today

[D3UC3S]

and get a magnaflow HI FLO cat.....dont just bore one out. Thats askin for crap like this to happen

[Barefoot]

dont forget to mention we hollowed out the cat todayy yall do that. now he needs a new 1. should have just unbolted it.

[j0natell0]

it bogs in every gear, it doesnt stutter. just feels like its not giving power. what should i do next

[j0natell0]

sorry let me explain it a little better. When i crank the car the rpms will jump to 1k. feels like a dead startup. then the rpms will jump up, then down to the point it sounds like it will stall and die. Then it will idle fine.. The car bogs when pressed on the gas all the way. Drives kind of normal, but when heavy accelerated it bogs.

[Z0_o6]

Compression check ASAP. If it sounds like you don't have compression.... you probably don't.

[Mr. Antonov]

Check your idle control valve vacuum hose.

[j0natell0]

still acting up

[Z0_o6]

What were the compression numbers?

[CaTcH22]

Check the vacuum to the MAP sensor and make sure the dizzy is ok. We also had the same problem with an older DA with a b20 swap that had a bad TDC in the distributor.

[chaseamundo]

20$ says its you 02 sensor.....checkem out

[VickNotic]

20$ says its you 02 sensor.....checkem out

$20 says it's not the o2 sensor :taun:


i might have had a similar incident like this once on my car, and night this same incident happened and my header was glowing red, and found out it was my cat convertor it was clogged... and i ended up gutting my cat convertor .. since we i live dont do emissions 8D

[j0natell0]

timing slightly off

[chaseamundo]

youknowit my be on to somthin haah

[StarBwoy]

didt you wash da motor same thing happen to my bros da water got in da plugs

[Barefoot]

went looked at it yesterday. his timing on the exhaust cam off by atleast 2 teeth.