Killing O2's?
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Killing O2's?
OK so I started up the Superram and everything seems to be OK except I have put three O2's in and all three were Zapped!
A month ago, I used a lot of Right Stuff around all of the intake gasket ports to the bottom of the intake, a lot where the block and intake meet front and back, oil pan etc.
I also had my headers coated inside and out with ceramic coating.
And, the bottom of the Superram lid is Powder coated.
The Right Stuff is supposed to be O2 safe,
but is it possible that Right Stuff, or Powder Coat is giving off a fume or gas that is killing my O2's ?
I never had this issue before on my Miniram.
I find it hard o believe that 3- O2's have been bad, but I will get another today and try it with a torch before I put it in.
And I plan on driving the car with no O2 in an attempt to burn off anything that may be causing an issue.
Anyone else have something like this? Any ideas, the wiring all checks out OK, O2 signal Pin D7 is now making good contact and O2 GRND D6 is well grounded.
A month ago, I used a lot of Right Stuff around all of the intake gasket ports to the bottom of the intake, a lot where the block and intake meet front and back, oil pan etc.
I also had my headers coated inside and out with ceramic coating.
And, the bottom of the Superram lid is Powder coated.
The Right Stuff is supposed to be O2 safe,
but is it possible that Right Stuff, or Powder Coat is giving off a fume or gas that is killing my O2's ?
I never had this issue before on my Miniram.
I find it hard o believe that 3- O2's have been bad, but I will get another today and try it with a torch before I put it in.
And I plan on driving the car with no O2 in an attempt to burn off anything that may be causing an issue.
Anyone else have something like this? Any ideas, the wiring all checks out OK, O2 signal Pin D7 is now making good contact and O2 GRND D6 is well grounded.
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
ld,
I use the right stuff all the time, and did not have any problems...so I doubt its that. I would run a seperate wire up to the ECM right off the sensor, even if its up through the door for testing purposes. Attach it to the ECM as close as possible - then see if you get a good signal. It may be that your wire coming up through the harness is bad.
Also hook a volt meter to the wire and see what your getting on it.
I use the right stuff all the time, and did not have any problems...so I doubt its that. I would run a seperate wire up to the ECM right off the sensor, even if its up through the door for testing purposes. Attach it to the ECM as close as possible - then see if you get a good signal. It may be that your wire coming up through the harness is bad.
Also hook a volt meter to the wire and see what your getting on it.
Instructor
Joined: Nov 2004
Posts: 221
Likes: 0
From: dickson tn.
i had problems with my o2s when they replaced my gaskets also and after replacing all 4 and replacing one of the new ones plus a bad burn on my arm all it was was a blone fuse imagine that may check that before replacing them again...
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Originally Posted by ski_dwn_it
ld,
I use the right stuff all the time, and did not have any problems...so I doubt its that. I would run a seperate wire up to the ECM right off the sensor, even if its up through the door for testing purposes. Attach it to the ECM as close as possible - then see if you get a good signal. It may be that your wire coming up through the harness is bad.
Also hook a volt meter to the wire and see what your getting on it.
I use the right stuff all the time, and did not have any problems...so I doubt its that. I would run a seperate wire up to the ECM right off the sensor, even if its up through the door for testing purposes. Attach it to the ECM as close as possible - then see if you get a good signal. It may be that your wire coming up through the harness is bad.
Also hook a volt meter to the wire and see what your getting on it.
Something is fishy!
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Originally Posted by LD85
I will give the isloated new wire test a try again Jesse, I did this once but I think the O2 was already blown.
Something is fishy!
Something is fishy!
Is there any thing on the sensors that you removed. Silicone is poison to the sensors. If its present, the sensor will appear to be coated with a yellowish glaze. Is the SR manifold powder coated on the inside as well? I doubt its the powder coating, but you may consider asking the powdercoater what the make up of the paint powder is.
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
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From: Indianapolis IN
Originally Posted by tjwong
Is there any thing on the sensors that you removed. Silicone is poison to the sensors. If its present, the sensor will appear to be coated with a yellowish glaze. Is the SR manifold powder coated on the inside as well? I doubt its the powder coating, but you may consider asking the powdercoater what the make up of the paint powder is.
No there did not appear to be anything on them that I could see, I will check with the powder coat guy too. The bottom of the lid is coated.
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Originally Posted by LD85
No there did not appear to be anything on them that I could see, I will check with the powder coat guy too. The bottom of the lid is coated.
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
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From: Indianapolis IN
Well I just did a test, I left the NEW O2 hanging and then turned the car on and then turned Datamaster on.
Everything would read fine until I touched the O2 to the header pipe, then it would go to ZERO mV. Pulled the O2 away and it would read, touch it again then ZERO
I think it is a short to ground somewhere , sound right?
EDIT:
Oh yeah, when I touch my multi meter to the driver side header pipe and the cross brace above the battery, it reads @ 1.5 volts
Everything would read fine until I touched the O2 to the header pipe, then it would go to ZERO mV. Pulled the O2 away and it would read, touch it again then ZERO
I think it is a short to ground somewhere , sound right?
EDIT:
Oh yeah, when I touch my multi meter to the driver side header pipe and the cross brace above the battery, it reads @ 1.5 volts
Last edited by LD85; Apr 24, 2005 at 03:27 PM.
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Melting Slicks
Joined: Nov 1999
Posts: 2,281
Likes: 129
From: NOVA
St. Jude Donor '05-'06-'07
Originally Posted by LD85
Well I just did a test, I left the NEW O2 hanging and then turned the car on and then turned Datamaster on.
Everything would read fine until I touched the O2 to the header pipe, then it would go to ZERO mV. Pulled the O2 away and it would read, touch it again then ZERO
I think it is a short to ground somewhere , sound right?
EDIT:
Oh yeah, when I touch my multi meter to the driver side header pipe and the cross brace above the battery, it reads @ 1.5 volts
Everything would read fine until I touched the O2 to the header pipe, then it would go to ZERO mV. Pulled the O2 away and it would read, touch it again then ZERO
I think it is a short to ground somewhere , sound right?
EDIT:
Oh yeah, when I touch my multi meter to the driver side header pipe and the cross brace above the battery, it reads @ 1.5 volts
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Originally Posted by XFIRED
Just thinking outloud...If you run a wire to the neg terminal of the battery and touch it to the side of the sensor(quickly)do you get zero output?
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Originally Posted by LD85
Well I just did a test, I left the NEW O2 hanging and then turned the car on and then turned Datamaster on.
Everything would read fine until I touched the O2 to the header pipe, then it would go to ZERO mV. Pulled the O2 away and it would read, touch it again then ZERO
I think it is a short to ground somewhere , sound right?
EDIT:
Oh yeah, when I touch my multi meter to the driver side header pipe and the cross brace above the battery, it reads @ 1.5 volts
Everything would read fine until I touched the O2 to the header pipe, then it would go to ZERO mV. Pulled the O2 away and it would read, touch it again then ZERO
I think it is a short to ground somewhere , sound right?
EDIT:
Oh yeah, when I touch my multi meter to the driver side header pipe and the cross brace above the battery, it reads @ 1.5 volts
Jake
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Originally Posted by JAKE
How are you making the wiring connections of the 02s?
Jake
Jake
The O2 has the factory wiring plug, female.
I will check out all of the wiring next weekend, I dont see whre any of the wires are be grounded out, but I will pull the harness back out an look it over.
vette-rookie: I use Datamaster to read the O2 mV's, with it unpluged the ECM mV goes to .450, and when I put a torch on the O2 it does not change much at all and it should jump around high and low mV's
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
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From: Indianapolis IN
Originally Posted by vette-rookie
Ok thanks, I was just wondering if there was any any symtoms that arise from a bad o2. I wonder about mine sometimes since it smells and looks like its rich every now and then.
Melting Slicks
Joined: Nov 1999
Posts: 2,281
Likes: 129
From: NOVA
St. Jude Donor '05-'06-'07
Originally Posted by LD85
No I did this and I think I got .368 mV
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
Originally Posted by LD85
Well I just did a test, I left the NEW O2 hanging and then turned the car on and then turned Datamaster on.
Everything would read fine until I touched the O2 to the header pipe, then it would go to ZERO mV. Pulled the O2 away and it would read, touch it again then ZERO
I think it is a short to ground somewhere , sound right?
EDIT:Oh yeah, when I touch my multi meter to the driver side header pipe and the cross brace above the battery, it reads @ 1.5 volts
Everything would read fine until I touched the O2 to the header pipe, then it would go to ZERO mV. Pulled the O2 away and it would read, touch it again then ZERO
I think it is a short to ground somewhere , sound right?
EDIT:Oh yeah, when I touch my multi meter to the driver side header pipe and the cross brace above the battery, it reads @ 1.5 volts
with Xfired, you may have a bad ground. Check the voltage from the header to the negative on the battery,or better yet disonnect your battery and get the resistance reading from the terminal to your O2 mount.
Last edited by aboatguy; Apr 25, 2005 at 08:15 AM.
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Originally Posted by LD85
Well I just did a test, I left the NEW O2 hanging and then turned the car on and then turned Datamaster on.
Everything would read fine until I touched the O2 to the header pipe, then it would go to ZERO mV. Pulled the O2 away and it would read, touch it again then ZERO
I think it is a short to ground somewhere , sound right?
EDIT:
Oh yeah, when I touch my multi meter to the driver side header pipe and the cross brace above the battery, it reads @ 1.5 volts
Everything would read fine until I touched the O2 to the header pipe, then it would go to ZERO mV. Pulled the O2 away and it would read, touch it again then ZERO
I think it is a short to ground somewhere , sound right?
EDIT:
Oh yeah, when I touch my multi meter to the driver side header pipe and the cross brace above the battery, it reads @ 1.5 volts
Check all your engine grounds. Using a meter set to ohms. Test between your engine and the negative battery terminal. Between these two points you should have less than 5 ohms. Also if you disconnect the o2 sensor there should be .450v indicated with DM. This is the ECM reference voltage. If say the sensor was cold and inactive with it connected and properly grounded you would see the voltaghe less than .450v. The ECM will not switch to closed loop until the minimum closed loop temperature threshold is met and also until the ECM sees the o2 sensor switch from low to high.
Melting Slicks
Joined: Nov 1999
Posts: 2,281
Likes: 129
From: NOVA
St. Jude Donor '05-'06-'07
Originally Posted by victoria vette 94
Sounds like your exhaust isn't grounded anymore because it's ceramic coated..... just an idea.
