98 blazer setting up stream o2 sensor code repalced o2 sensor 3 times fix's miss 4 about ever 300 miles then knocks out o2 sensor ... dealership said its a weather realted problem getting moisture into the wiring killing the sensor so if anyone has a wiring schematic for a 98 blazer with a 4.3 please email that sucker to me cuz im fed up with the dealrship charges ever other week im just going to run new wires for computer to o2 sensor and install new sensor.... when it starts acting up it kills left bank 1,3,5 miss badddd.. so if you think you got a schematic please look and let me... thanks

any other ideas come on guys ???

There should be some kind of warranty on the sensor. Check into that b/c they may be skimming ya.

ya mine is startin to eat them up to, i just replaced all of them bout 2 weeks ago, and im on my second string of them. its rediculous, one of my mechanic buddys told me to replace my CAT ( or empty it) and my MAF. my blazer sank in a pond up to the dashboard, so there was moisture everywhere. so thats the cause of my problems, and it is a very good chance that yours are dying because of moisture also. or at least your first string of sensors. i dont thing water in the receiving wires would have killed so many of them, but i suppose its a possiblity. check the harnesses, see if the seals on them are good. try a little bit of silicone around them to water-proof them next time u put them on. and if the sensors are bosch, or OEM sensors, there is a one year warranty on them, so he shouldnt be charging you for them, u can go to a autopart store and get them for 45-50 bucks each, replace them yourself, and bring them back every time they die.

they cute out the quick conctor and used butt connecters with heat shrink and glue then heat shrink the hole thing the last time they replaced it... same problem.. anybody got a match and a can of gas??

As an electrician I have found that "butt connectors" can be unreliable if not crimped properly. In vehicles I have found that they fail or create a high resistance point due to moisture and vibration.

However, these symptoms usually take a long time to appear and the heat shrinking - if done right - is supposed to be waterproof. We use heat shrinks to make splices in maholes where the wires will eventually be under water and they work fine. Even with water splashing on the heat shrinked connectors from underneath, I wouldn't think they would get corrupted after only 300 miles.

**:grinno: However, now that I thinking about it more >> the operating voltage of the sensors is very low and the slightest increase in resistance can throw off the reading to the computer. I would try making fresh UNINSULATED butt connections, then soldering the butt connectors, then heat shrinking them.

first things first what is the code?
secondly if you are going to a chevrolet dealer that is butt connecting around weather pack connectors. do not go back. while i find it hard to belive not all dealerships are equal. although if it did not fix it it was not the problem.
codes start at p0130 and go to 167. the specific code does make a differnce.
post the code

2 codes upstream sensor the one right below the manifold and .. missfire code on 1,3,5 cylinder on scan tool there missing itmentaly

2 codes upstream sensor the one right below the manifold and .. missfire code on 1,3,5 cylinder on scan tool there missing itmentaly

With them codes you need to work on the missfire.
Bad missfire will overload 02 sensors and set a 02 sensor code.
What 02 sensor codes is it setting?

A flunkie or dead miss on no 4 cylinder CAN BE CAUSED BY MOISTURE IN THE 02 SENSOR WIRING.
But iIdo not think it sets any codes just a dead miss on 4 cyl
The wiring that goes by starter to right side o2 sensors is the problem area.
And also I have found a bad or Corroded plug in on o2 sensors on rght side that will make no 4 cyl miss.:grinyes: :lol: :grinno:
There was a TSB on that but I think it was for around 1995 blazers.
It says replace the 02 sensor wiring at starter on right side.
But the wiring kit is about 350-450$ last time I priced one.

Defective MAF sensor can cause this as well.

Clean or replace the MAF next time and you might see everything smooth out.

A friend had the same problem, he swapped in a new MAF and not one more problem since then.

Try it, you can take the MAF back if you don't need it.

You don't have to buy AC Delco. Also you might be taken for a ride by the dealer. O2 sensors don't just keep on burning out like that.

tested all o2 yesterday say they are good so it has to be in the wiring im guessing.. i checked for lint on the mas when all this started to happen and just the other day too..

tested all o2 yesterday say they are good so it has to be in the wiring im guessing.. i checked for lint on the mas when all this started to happen and just the other day too..

What are all of the code no?

tested all o2 yesterday say they are good so it has to be in the wiring im guessing.. i checked for lint on the mas when all this started to happen and just the other day too..

Replace the MAF.

Checking for lint is not how you check to see if it is working.

i give up im buring this $@#$# to the ground i just put a mass air flow on it 2 new o2 sensors new connectors and drove it in the rain today it made it about 2 miles before it started screwing up again... im buying a ford! its nickel and dimed me to death the dealership as @# rapped me .. and i didnt even get a kiss out of the deal im just feed up with the hole thing rite now

Take it to a different dealer bud.

Take it to a different dealer bud.

10-4 on the different dealer there BlazerLT
Here is some dealer tips for him to find a good one.
Tip on going to the dealer
Ask that only a factory certified gasoline engine performance specialist work on your car.
Not all dealerships are concerned with how repairs are dispatched, and not all dealership techs bother to take advantage of the training offered by factory (the vast majority of which is paid training). If the dealer is uncooperative, ask for your money back and call around for a dealer that will accommodate you.

I would still ask for my money back from them.

Paying that money and having nothing accomplished is essentially fraud.

Talk to the manager and stir up some royal shit and get them moving.

Them sitting there and not fixing it and them holding their hand out for more money to try to fix it again is a scam and you don't have to put up with it.

No more Mr. Niceguy!!!! Get in there and cause a scene and get them moving.