3rd Oxygen Senor goning bad (HELP)
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3rd Oxygen Senor goning bad (HELP)
I have a big problem with an 88 ranger with v6 automatic, 2wd. The oxygen sensor keeps going bad...I have had all kinds of test run on it and it keeps showing the O2 sensor is bad. This is the third one I have put in and I am holding the forth one in my hand waiting to find out what is really wrong with my truck.
It is not keeping at an idle speed and continues to die. The engine light will go on and off..at one point it got to where the truck would not start at all. I changed the O2 sensor and it started right up, but is still not keeping an idle speed and dying. When changing the O2 sensor with less than 100 mile on them it is solid black with pretty bad carbon buildup.
Within 4000 miles the truck has had a major tuneup, along with new heads.
Sorry for the long post, but I am all out of ideas to fix the problem.
Thanks.
Jason
It is not keeping at an idle speed and continues to die. The engine light will go on and off..at one point it got to where the truck would not start at all. I changed the O2 sensor and it started right up, but is still not keeping an idle speed and dying. When changing the O2 sensor with less than 100 mile on them it is solid black with pretty bad carbon buildup.
Within 4000 miles the truck has had a major tuneup, along with new heads.
Sorry for the long post, but I am all out of ideas to fix the problem.
Thanks.
Jason
Cargo Master
Joined: Aug 2003
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From: Belleville, Ontario
Welcome to the forum Jason Jones..... The oxy. sensor is probably the victum of the real problem. Go through your records and detail the tuning and maintenance to the point were the first of 4 sensors went bad. In My Personal Opinion, regular gas should not be used in any privately owned vehicle. Step up to Premium. Give us another post with a summary of the tuning. Break it down by mileage readings please. Also, were there any other codes with the oxy. sensor code?
Elder User
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From: northeastern ohio
I dont have any help off hand on your problem. But if you dont use regular grade gas you are wasting money and premium actually makes carbon build up faster (unless you have it tuned for premium)
Cargo Master
Joined: Aug 2003
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From: Belleville, Ontario
Originally posted by Rand
I dont have any help off hand on your problem. But if you dont use regular grade gas you are wasting money and premium actually makes carbon build up faster (unless you have it tuned for premium)
I dont have any help off hand on your problem. But if you dont use regular grade gas you are wasting money and premium actually makes carbon build up faster (unless you have it tuned for premium)
Post Fiend
Joined: Dec 2001
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From: South Jersey
The 2.9s are known for burning the O2 wires, check them out. The other thing that kills them is coolant an the 2.9s are know for cracking the heads when overheated, do you lose coolant or have white smoke.
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Thanks for responding guys...the truck has had regular maintence done on it as far as oil change and regular maintence work.
The O2 sensor started going bad when the water pump went out and the truck over heated leading to cracked heads. I had new heads put on along with a new water pump, cap and rodor, plugs, belts...etc. Along with the new O2 sensor.....this is when the problem started. I took it back to the place that did the work b/c it was not keeping an idle speed and was dying along with the engine light coming on after about ten minutes of driving. They decided it was a bad O2 sensor that was causing the problem. They put a new O2 sensor in and the problem was fine for about 2500 miles....then it started all over again. I then took it to another place to have them run more tests and see what they came up with and they came to the same conclusion of the O2 sensor. I changed it out again and it is still doing the same thing.
Any other questions, just ask....thanks again for the help!!
The O2 sensor started going bad when the water pump went out and the truck over heated leading to cracked heads. I had new heads put on along with a new water pump, cap and rodor, plugs, belts...etc. Along with the new O2 sensor.....this is when the problem started. I took it back to the place that did the work b/c it was not keeping an idle speed and was dying along with the engine light coming on after about ten minutes of driving. They decided it was a bad O2 sensor that was causing the problem. They put a new O2 sensor in and the problem was fine for about 2500 miles....then it started all over again. I then took it to another place to have them run more tests and see what they came up with and they came to the same conclusion of the O2 sensor. I changed it out again and it is still doing the same thing.
Any other questions, just ask....thanks again for the help!!
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New User
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The 2.9s are known for burning the O2 wires, check them out. The other thing that kills them is coolant an the 2.9s are know for cracking the heads when overheated, do you lose coolant or have white smoke
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Post Fiend
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Does your truck have dual exhausts, or have you made any mods to the exhaust system? A friend of mine had a shop weld up a set of duals on his 4.0, and was told that he might see some O2 sensor failures. Sure enough, he has to put a new one in about every 10K.
Post Fiend
Joined: Dec 2001
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From: South Jersey
I went back and read your original post again, is it possible that your running rich and the carbon build up is cause the O2 problem. Test the fuel pressure and check the fuel pressure regulator vacuum line for gas.
