2001 Tacoma missfire no check engine light

This actually reminded me of a TW member who was fighting something similar to this for weeks and weeks until he finally found a clogged cat.

 

Change the PCV valve, as well, it's probably what started the whole mess.

 

Maybe a silly question but what is the difficulty of this?

 

Just pop the old one off and pop the new one in pretty much. Cheap too.

 

Could also be a bad injector. Check the resistance of each one.
Easy to do, but you need a multi-meter (to read resistance in ohms).

 

sub'd
having a bit of a misfire as well; thinking may need new plugs/coils, new battery or MAF sensor

 

I was having issues with misfires as well, I did a few things before I changed the MAF. Now shes running on all 6 again. Feels good and just in time for winter. There is a spray you can get to clean it instead of replace it but I was over the headache so I splurged the 90 bucks to have it delivered to my door.

 

Is there supposed to be a hose there ?!

 

subbed for outcome

im having a little hesitation as of recently. The idle went from smooth to slightly rough about 4 months ago. 2 weeks ago while sitting at a light, the idle went down like it was gonna die out. The next incident was 2 days ago, i let it idle for 10 minutes, hopped back in the truck, reversed fine, then when I hit the gas pedal to drive forward it gave a quick hesitation, like 2 or 3 skips then drove like normal. I changed from single electrode plugs to double electrodes about a week ago. The last incident so far was yesterday, felt some slight hesitaion on the way home, felt it on 3 different occasions. The only difference this time was I felt the hesitation while driving around 40-50 mph.

Is this similar to what your feeling?

I have been getting the P0420 code on my Ultra Guage. twice in the last month or so.

maybe its time I bite the bullet and get new O2 sensors along with 2 new cats.