matt688

2001 Civic, 170,000 miles.
My Malfunction indicator light have been coming on and off for a couple weeks, yesterday I lost all acceleration (idle mode?) and had to pull over for a bit. While this happened the light came back on and started blinking. My acceleration has been sluggish for for awhile as well.
I took it to autozone today and got the following codes.

P0300
P0301
P0302
P0303 - misfires

P0131 - o2 sensor
P1457 - emissions leak

The plugs, wire, coils and catalytic converter are all about 18 months old. Before I just started replacing everything again, I was wondering if anyone could shed some light on whats going on.
I don't think my plugs are bad. I think I will start with the o2 sensor and see if I keep getting the misfires. Could that have anything to do with my emissions leak?
How risky is it to drive with these problems?

Thanks for any input!

johndeerebones

Plugs are the likely culprit honestly. Find your emissions leak and go from there. That is the cheapest route. Adress the 02 code and go from there.

got2run5

Start with your plugs-they're cheap. Plus if you continue to drive with misfires you're going to fry your new cat.

johndeerebones

True, misfires dump fuel or run too hot and eat cats.

matt688

replaced the o2 sensor and the plugs. pretty sure my cat is gone, their are holes where pipes connect to the converter, think ill try weld this to see if I can prolong it a bit more. Thanks for your help