Can an o2 sensor cause a misfire on plugs? I need help
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09-13-2014
Can an o2 sensor cause a misfire on plugs? I need help
09-13-2014
nope, but a clogged cat can......need more info to help you further.
09-13-2014
How can i unclog it?
09-13-2014
if its clogged you have it cut out and a new one welded in the down pipe.
but this is still not reliable info cause your not telling the full story yet........
09-13-2014
Well the car started shaking and putt puttering so i changed the spatk plugs the wires and the three coils and its still acting the same like its loosing power and feels clogged so i got it read and they said its my o2 sensor now o2 sensor number 1 which is upstream rite?
09-13-2014
post the code your getting.
does the check engine light flash when its floored? engine sound like a vacuum with a full bag? like it cant suck any more air in and feels gut less?
09-13-2014
Dont have the code anymore but yes the engine light flashes and when revved up our even driven theirs a pop sound
09-13-2014
was it popping before the plug and wires change? if not, double check the plug wires are on right.
get the car scanned again, post that code, it tells a story and will lead you to a cure.
09-13-2014
No it wasnt popping after i put this o2 sensor in and it still does it ima get it read again then post the code thanks
09-13-2014
on quick free cat test is to remove the up stream o2, the one behind the engine, then drive the car, if it runs better the cat is clogged up. taking the o2 out causes a good leak thats pre cat, so the engine can exhale some.
09-14-2014
Code is coming up as random misfires now
09-14-2014
p0300 can be a bad cat, or ignition problem.
pull that up stream o2 yet then drive it see if it feel better?
or drive it hard at night, see if the cat is glowing red?
bang on it when its cold to listen for stuff rattling inside the cat yet?
09-14-2014
I was told to put foam in my gas to clear out my cat
09-14-2014
who told you that???????
if its broken and is blocking the exit port its fubared. if its clogged, also fubared. ive never heard of cleaning a cat, it gets replaced.
if your up stream o2 was faulty for a long time your engine was over fueling, thats why the cat clogged up.
09-14-2014
I gotta start from square one with these spark plugs with these random misfires im thinking its the coils
09-14-2014
double check the plug wires.
if those are on right, id say back to the cat.
09-14-2014
Would the cat cause misfire? Because thats the code that keeps coming up
09-14-2014
po300 aka flashing cel light is either something ignition related or a clogged cat. always. most of the time its the cat.
being you had a a o2 code, id say its the cat.
09-14-2014
Should i change the down stream o2
09-14-2014
no, change the cat lol
you refuse to accept the cat theory i see.
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