ok guys my b18c5 is having some hesitatingand bogging idle problems, alot of people had the same problems and said it was their o2 sensors. Now my car isnt throwing any codes. so im wondering can the o2 sensor still be bad??

 

you should get a CEL if its the o2

 

yup. check for leakes in the fuel.vacuum system.

 

Check all plugs and wires.. done a tune up lately? check those out too

 

what is it then my cap and rotor look clean and good working shape, i replaced my plug, my wires say 2000 so they are about 3 years old but look in good working shape. The fuel filter looks a little worn though

 

Yup go get some new plugs wires and cap rotor. then try it. if its not then do a CEL and i have the complete list of codes in my sig.

 

bump

 

ttt

 

your ecu will only throw a cel if your emissions are 1.5 times normal. it will not come on for other problems if it does not throw your emissions off..me personaly i hate cels..mine came on cuz my gas cap was a little loose...that pissed me off cuz the code read that it was a problem with the fuel tank...and yes i did eventually figure out that it was the gas cap after i dropped the tank to search for a leak arrrghh.

 

so can i have a bad o2 which will cause sputtering but a code NOT be thrown!

 

Yes you can because I just had the same problem. My car was sputtering/violent hesitation without a CEL. I unplugged my primary o2 and it solved the problem. The car ran and idled perfect once again. You will get a CEL if you unplug it, but you will be able to tell if it's your problem.

So unplug it...see if it runs better. If it does, go buy a new o2 sensor and reset ECU. If it doesn't, keep troubleshooting. Just a quick, simple test.

 

ok cool, which one is the primary, which teh secondary. im runnin b18c5 motor obd2

 

^

 

The primary is the one on the engine harness that plugs into the collector. The secondary is the one in the cat.

 

thanks a bunch, the thing is though that the problem isnt all the time, it is almost a daily thing though. so if my car is runnin good at the time i take the o2 out how cna i tell if that problem?? should i just drive around w/ out all day and see if the hessitation and bogging happens again?

 

Mine was the same....it happened sometimes...sometimes it didn't. yeah..just unplug it for a day or something and see if it happens. It won't hurt anything.

edit: you don't need to take it completely out..just unplug the plug.

 

yeh thats what i ment, thanks man ill give it a shot!

 

up

 

Any luck???