fsck3r

I am getting a code 41 (Primary O2 Sensor Heater) Would that crack cause it?

3RdT

if its leakin, i think possibly could but im not 100% sure.

RabbittZ

iTrader: (1)

what mani is that?

confidence

mine didn't when it cracked. runners 3 and 4 were complealy spereated from the cat on my manifold and i had no codes. maybe yours got damaged?
oh btw, don't wast your time welding that. cast iron is a bitch to weld and the welds ususaly crack soon there-after. my welds lasted 9 months at the longest. try to find a new manifold

EE_Chris

Get a multi-meter.

Unplug the O2 from the engine wiring harness.

Measure the resistance between the two black wires. It should read between 10-30 ohms. If yours does not, you have to replace it...you can not fix the heater section of the O2 sensor, only replace the entire unit.

I just went through the same thing, but for the 2nd O2. When I measured mine, it measured >100k ohms and had 170k miles on it.

civic-4-ges

I had a similar crack and it did not give a cel

EARLdaSQUIRREL

i had a similar crack in my z6 manifold and no cracks ( im guess its a z6 or am i wrong?)

fsck3r

Alright Thanks guys I am looking for a new manifold so I will probably need a new or used 02, Appreciate the help and it is a z6 mani

blazinb16

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EE_Chris &raquo;</TD></TR><TR><TD CLASS="quote">Get a multi-meter.

Unplug the O2 from the engine wiring harness.

Measure the resistance between the two black wires. It should read between 10-30 ohms. If yours does not, you have to replace it...you can not fix the heater section of the O2 sensor, only replace the entire unit.
I just went through the same thing, but for the 2nd O2. When I measured mine, it measured &gt;100k ohms and had 170k miles on it.</TD></TR></TABLE>

Nice info....i'v got the same code gues i'll be doing what you did here real soon....dose code 41 effect performance at all???

jetpilot

I have the same code, I havent tested it but in the helms there is a complete step by step trouble shooting to check if its the 02 sensor or maybe a wire going to the ecu thats cut or touching a ground

fsck3r

Im guessing my O2 is bad instead of a wire going to the ECU, and from what I hear the code 41 makes your ECU or at least my p28 run in a safemode without VTEC

jetpilot

Im pretty sure it doesnt cause I have a p28 and at 5.5k rpm I hit vtec without a doubt

fsck3r

Hmmmm... That arises other questions then, your VTEC engages at 5.5k and your completely stock?

jetpilot

well at 5.5k the intake starts sounding totally different (I removed the lower air box/horn/silencer thing), so I guess theres where vtec engages

fsck3r

hah this is too funny, I had lost the green connector from the wiring harness so I am using slide on pins to the vtec ground and pressure. I had the Ground and the pressure mixed up pulls all the way to 7200 now

jetpilot

not funny, just dumb
j/k Great your probs are gone!

CeoStatus0

i had my stock exhuast mani cracked all the way around.. the giant flange from the manifold was the only thing keeping it on.. my car never threw a cell... but i just recently replced my exhuast mani and i felt a loss in torque.. when it was cracked my car would always give off a loud garggling sound when it was warming up... good side is that my car is fixed... bad side is i miss the power, even though it wasn't much but i could really feel the difference