Ok - We've had this car for a little more than a year, when we bought it we took it in for complete servicing (new brakes, O2 sensors, oil and filter changes) but our car has now gotten worse when it idles or is stopped it dies. It has now started to shut down while we are driving (slowly or beginning to stop at a light or stop sign). The service tech said it was the O2 sensors and all were replaced. Before I pay thousands of dollars to have repaired, can you offer a solution as to why this is still happening?
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ok this can be applied to just about any vehical ever made ...but my experience is with ( for this case) my 1991 jeep cherokee..i had all kinds of proplems and codes...they consisted of hard starting, reving up and down, cutting out,(engine dying), worse and worse gas milage..stumbling..o2 sensor codes( fault o2 sensor)..bad isc motor..bad map sensor...bad temp/thermostat and my brakes kept getting worse..(softer and softer...so i started posting my proplem all over the net and even broke down and took it to a jeep service center...i spent well over seven hundred dollars and still most all of the proplems remained...so i referd back to an old and very simple way to search for proplems with any motor...(cheapest way first)...lol well i guess not first..at least not for me haha..i started unpluging the different sensors while the engine was running to see if there was any change and every one seemed to change things a little ...so i then took a can of carb cleaner and started spraying ever gasget surface and vacume hose...!!!!..i found that the engine changed pitch every time i sprayed the intake gasget...!!!..so i bought a new one for ten dollars ...spent 4 hours to replace it .. and it fixed every one of the proplems i had...it sounds crazy but if you put a little thought behind it ..it makes perfect sense...o2 was reading faulty and lean(more oxygendue to leak)..brakes were getting softer(due to drop in manifold vacume) map sensor was reading faulty and causeing stumble and cut out (also due to drop in manifold pressure) temp/thermosate reading due to idle air temp (which needs to coencide with temp sensor) not recieving proper air flow reading also due to leak...well as much as i can go on about this i am just posting this where i can i hopes that my adventure saves someone a little money....remember i spent over 7 hundred before figuring out this simple ten dollar fix!!!! and since the intake and exhust share a common gasget it is pron to leaks....good luck and i hope this helps
If you have a check engine light on you can pull the code and it should tell you if its an o2 sensor or not. I usually replace them when i do a major tune up. Change your spark plugs, wires, cap and rotor (if your car has cap and rotor), oil and filter, tranmission oil and filter, air filter, fuel filter, coolant flush, and o2 sensors. Thats a major tune up. Also spray a little brake cleaner above the engine around the intake and vacuum line and see if the engine reacts to it. If does you have a vacuum leak which may cause you to surge aswell. You may also want to change your iac motor and throttle postion sensor aswell seeing as they have alot to do with idle and acceleration. Without an engine code its hard to tell but those are my basics gor that problem. You can ask a mechanic for a diagnostic then you can fix it yourself if thats what you are trying to do. Hope this helped good luck
O2 sensor have you replaced? Does the car have any oil leaks? Does
the car drive abnormal? hesitate, buck, etc. I have seen where
the engine is leaking oil. That oil makes its way into the connector for
the front O2 sensor. Since the O2 is located in the pipe at the rear of
the motor, slightly under the oil filter. When the oil gets into the
connector it causes the readings to become out of whack and the PCM sets
a code for it. Do you replace the engine harness. Once the oil gets
inside you can never get it out.
You can always try to make a piece of harness
and bypass the section that goes down under the intake to the sensor.
Essentially taking the oil soaked part of the harness out of the
picture. If the problem is gone than you know for sure its the harness. The connector by the O2 is connector C105. There is another spot by the
right strut tower where connector C210 is. that connector houses the
same wires as C105. You can try to back the pins out of C210 and run new
wires down to the O2 ans see what happens.
i have the same car and year. Both my lights flashed i bought it to my mechanic he checked my oil and said that when i got my car serviced at a cheap place they put in cheap oil. he hooked up his computer to mine and got an o2 sensor code. he shut the light off and changed my oil. all set. i also use premium gasoline and my car runs very good.
HI first off the O2 slow resp code is an exhaust leak and not the O2 sensors itself. Slow resp codes is due to to the O2 reading 2 much oxygen or to little exhaust caused by a leak. Now on to the more important. first thing you should do is go buy a can of starter fluid or 2+2 gum cutter and spray it near the injector number one if the intake gasket is or the injector is leaking the car will sputter than run ok for about a second and then start miss fireing again. Dont buy a coil yet. Try this. get a plastic spray bottle and fill it with alittle luquid soap and the rest water. spray the coil pack and look and listen if you hear a clicking noise or a a blue sparking arking off of the coil, also do tis with a your spark plug wires. One last thing if your spark plugs are not ngk thay are wrong and that also maybe part of your problem.
You may have a blown heads. Try by replacing the oil pressure sensor located in the rear of the engine. Second clean the throttle body by taking off the hoses. Get the cleaner from the auto parts store. Clean throttle body, air intakes, air filter, new oil filter, and have your feul injectors services. Did you check under the car for oil leaks? Try placing a white sheet under the car to see if you have a bad oil spill. Make sure all harness wires are not shorting out. Alot of wires are placed close to heat sources and could melt them. Yoyu just have to replace the melted section and reroute the wiring........runjoe