Brian_92GSR

My f-max kit is on and running well, but I do still have some exhaust leaks (such as the big hole for another o2 sensor). I ran hondalogger for the first time today and the o2 reading stayed around .20, where as .80 is normal. Do you think this is just due to the leaks before the o2 sensor? I am running a turbo program for a 94 gsr.

MiraiZ

its quite possile that you are getting inaccurate readings from exhaust leaks....what are you planning to do to plug those o2 sensor hole up?...also are you usind the MF2?

Brian_92GSR

No I'm not using the MF2. I'm not really sure what to use to plug the holes. No one on honda-tech knows what size bolt I need, and my guess on what size it is isn't available locally (3/4" fine thread). I might have to go with a more permanent solution.

MiraiZ

As a temporary measure, just get some exhaust repair kit to plug the hole up....then go to a home depot or something and try to buy an assortment of bolts that might fit....or if you can find the right one then take it to a muffler shop and have it welded close...

sgT

plug it with another O2 sensor and hook that up to an a/f meter

G

There is a metric "oil pan bolt plug" available at any auto parts store. The thread is....I can't remember off hand, but it is metric. Like 1.25Xlength...... Take your car and a jack and test fit at the auto parts store. If I can remember the thread size, I'll post it.

DeeJay

Get the part from f-max, or take it to a good muffler shop and they can tig weld it closed.

1.8EG-T

I had to put another o2 bung in my dp, most autoparts stores carry a non fouling sparkplug adapter, the inside of it is a perfect match to the o2 sensor, find that size, and that is the size you need. I will check to see if I can figure it out for you.

fastestdriver

O2 sensor thread pitch and size are the same as spark plugs. Screw an extra spark plug in the hole to make sure then go the parts store and find a bolt the same size and the spark plug threads.

Brian_92GSR

Keep in mind that although it has two holes for the o2 sensor, they are threaded differently. My stock o2 sensor would only fit into one of the holes.

GruvyTune

you go to NAPA and ask for an O2 sensor bung plug. Thats where I got mine at. Standard size.

torin

Brian_92GSR

Hey torin - the one you had to plug was the one closest to the cat?

GruvyTune

I only had one hole in my downpipe and that was the one that was plugged. I have OBD1 and I had my carsound cat made with a bung for the sensor.

like I said, get the part from NAPA. was $10 (ouch!)

Brian_92GSR

Just got the hole plugged. It was a 14mm bolt that ended up plugged it.