AlaskanPathfinder Posted August 16, 2008 Share Posted August 16, 2008 I have a 95 Pathfinder that has a bogging issue, if I punch it.. it hauls the mail, no smoke or wierdness however if I drive it normal it sluggs out at around 1500rpm and then picks up nice and then hits 2nd gear sluggs out then picks up nice and if I go highway driving it has almost a rythmic bog when holding the throttle steady...Its had new plugs (MKG) spaced at.032 ,wires, cap, rotor, fuel filter ,air filter and I also cleaned the MAF I did notice by spark plug 6 there is a plug hanging there much like the plug that goes into the MAF it still has the clip but cant find out where it goes..I fell in love with this truck and want the bogging to stop any help would be great this truck runs and drives too good for it to be major but have run out of ideas Link to comment Share on other sites More sharing options...
nige Posted August 16, 2008 Share Posted August 16, 2008 try unplugging the O2 sensor under the hood and see if it improves driveability. You could check all the vacuum lines for cracks too. Your fuel pressure regulator is also back there by plug 6. the vacuum line is prone to slipping off or getting bumped off when you change that 6 plug Link to comment Share on other sites More sharing options...
AlaskanPathfinder Posted August 16, 2008 Author Share Posted August 16, 2008 Ok thanks fro the reply and where can I unplug the o2 sensor under the hood I cant find it...I will check vac lines on the pressure reg, its driving me nuts it is such a cool truck Ive never had a pathfinder always chevys but im impressed Link to comment Share on other sites More sharing options...
AlaskanPathfinder Posted August 16, 2008 Author Share Posted August 16, 2008 Ok checked vac lines and they look good I can not find where to unplug the o2 under the hood ...if someone could direct me please and thanks:) Link to comment Share on other sites More sharing options...
AlaskanPathfinder Posted August 17, 2008 Author Share Posted August 17, 2008 Ok checked vac lines and they look good I can not find where to unplug the o2 under the hood ...if someone could direct me please and thanks:) UPDATE: skrillaguerilla's advice worked my heated o2 sensor is unplugged and I have no CEL..the truck accelerates and runs great....Thanks again!! J Link to comment Share on other sites More sharing options...
adamzan Posted August 17, 2008 Share Posted August 17, 2008 I'm having a similar issue, where did you find the plug? Link to comment Share on other sites More sharing options...
AlaskanPathfinder Posted August 17, 2008 Author Share Posted August 17, 2008 the plug is in between the battery and the firewall its on a cluster of other plugs it is a grey plug, with 3 wires( 1 black and 2 white) and im not sure its ok to run with it unplugged but my truck is all better Link to comment Share on other sites More sharing options...
morpheus Posted August 17, 2008 Share Posted August 17, 2008 That's a common symptom for the older trucks and it almost always is the o2 sensor. Just follow the wire up from the exhaust till you find the plug. Link to comment Share on other sites More sharing options...
nige Posted August 17, 2008 Share Posted August 17, 2008 hey mike glad i could help alaskan. you can drive your truck around with the sensor unplugged, but it may adversely affect your fuel economy; keep and eye on it. Sometimes a broken o2 sensor is caused by an improper air/fuel mixture. you can replace the sensor and the truck should run good when you plug the new one in. If you had a cel; you will need to reset the computer. To do this, unhook your battery terminals, and push all the buttons inside the car; move windows etc, try to get the last of the electric current out of the system. leave the battery off for about 5-10 minutes to be sure, then hook it all back up and start the truck and go for a test drive. The CEL shouldn't come back on unless there is another problem with the system. Link to comment Share on other sites More sharing options...
adamzan Posted August 17, 2008 Share Posted August 17, 2008 That's a common symptom for the older trucks and it almost always is the o2 sensor. Just follow the wire up from the exhaust till you find the plug. Are the service managers for all dealerships named mike? The one here is too Link to comment Share on other sites More sharing options...
Kittamaru Posted August 17, 2008 Share Posted August 17, 2008 hey mike glad i could help alaskan. you can drive your truck around with the sensor unplugged, but it may adversely affect your fuel economy; keep and eye on it. Sometimes a broken o2 sensor is caused by an improper air/fuel mixture. you can replace the sensor and the truck should run good when you plug the new one in. If you had a cel; you will need to reset the computer. To do this, unhook your battery terminals, and push all the buttons inside the car; move windows etc, try to get the last of the electric current out of the system. leave the battery off for about 5-10 minutes to be sure, then hook it all back up and start the truck and go for a test drive. The CEL shouldn't come back on unless there is another problem with the system. Uh... won' the CEL go out after 2 good checks from the O2 Sensor? Link to comment Share on other sites More sharing options...
AlaskanPathfinder Posted August 17, 2008 Author Share Posted August 17, 2008 Ok thats good to know didnt want to hurt my truck running it without o2... Im gonna replace soon but inbetween paydays I have a bad feeling that when I get a new o2 its gonna go back to the "bog" but I hope not thanks for all your help ..trying to get ready for the snow this truck is gonna be fun when it dumps here in AK, Nov-Mar its 4x4 time just to get to the store:) ...... good times!!! Link to comment Share on other sites More sharing options...
Precise1 Posted August 19, 2008 Share Posted August 19, 2008 Just a reminder, one of the best first steps of trouble shooting is checking the ECU for codes. A lot of the time it will dispay O2 (or other issues) and eliminated guesswork for the first item to be R&R'd. B Link to comment Share on other sites More sharing options...
adamzan Posted August 20, 2008 Share Posted August 20, 2008 Uh... won' the CEL go out after 2 good checks from the O2 Sensor? I unplugged mine today and it runs a hell of a lot better but I didn't get a CEL Link to comment Share on other sites More sharing options...
94extreme Posted August 20, 2008 Share Posted August 20, 2008 glad i could help alaskan. you can drive your truck around with the sensor unplugged, but it may adversely affect your fuel economy; keep and eye on it. Sometimes a broken o2 sensor is caused by an improper air/fuel mixture. near sea level it'll run all day but going high will suck you dry. Link to comment Share on other sites More sharing options...
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