Mechanics

DRIVING PROBLEMS! NEED HELP!

1997 Nissan Pathfinder • 187,000 miles

Hey Guys,

I have a 1997 Pathfinder that me and my dad got so that I could have my first car! And when we first got it, it was in pretty good shape, but not so much any more. It has gotten so bad that you have to literally push the 'pedal to the metal' to even get it to go! We have invested a lot of money into this car, and at this point we are just trying to get it in good enough shape to sell it so that I can have a working car for my senior year!

As I said above the car has gotten so bad that you have to push the gas pedal all the way down just to get it going! Now, I literally live right next to the school so I can get there but with it getting less than 10 MPG cause of this problem, and cause I have to leave REALLY early so I don't have to worry about slowly getting into traffic.

Anyways on to the problem! When you first start it up (in the morning or the afternoon)you have to set there and rev it up for like 5 minutes (and in this time the pedal is pushed all the way down and the RPM's are between 2 and 3 thousand) and when it finally gets to where it starts to push 5000 RPM I head on out. And, for the first 1000 feet or so the car will jerk and not go above about 5 MPH then it becomes 'normal' and gets to where it won't jerk. After this time of 'warming up' the car will do a decent acceleration to about 35 MPH then it very sluggishly accelerate upwards. And, even after a decent amount of time driving it (about 10 mins or so) it still drives up to the 35 MPH mark and so on. Also, when I'm driving it home (so in the afternoon; never done this in the morning) the RPMS will start to drop and die suddenly unless you feather the gas to stop it, and when this happens it will sit their and flood itself to death. It will also flood when you go to start it at about any time after driving it. It sometimes does this in the morning if I stop for breakfast but it will start up after about 5 - 10 seconds unlike in the afternoon when it will literally sit there for almost a minute flooding.

Now, on to what my dad and I have done. We have replaced the fuel pressure regulator, fuel pump, fuel filter, MAF (not a OEM a aftermarket one), all the spark plugs, distributor cap and rotor, throttle body position sensor, and the air filter. We also put in a new starter. (As you can see we are sick of putting money into this thing and not getting any results!)

And, the things we have done to it! We have ran high octane fuel and fuel injector cleaner through it (when we ran the fuel injector cleaner in it the 'warming' up in the morning got a little better). We have also tried running it with the pipes disconnected, and we have tried a working distributor from a 2001 Nissan Xterra. The computer has gave us two different codes over the last several months too. They are (I don't know the name of the codes) a misfire on cylinder 5, and random multiple misfire.

If you guys can help me I would greatly appreciate it! I really want to get rid of this Pathfinder (in working condition!) So that I can have a working car for senior year!

Thanks,
Justin
Avatar
TheHatedPathfinder
July 17, 2012.



Sounds like the cat converter is bad not allowing the engine to breathe.

Roy

ASEMaster6371
Jul 17, 2012.
Thank you for reply! My dad tried disconnecting the cat (not taking it off) and it didn't seem to make a difference but that was a while ago (one of the first things he did) do you think it would make more of a difference if we took it completely off? And, I'll ask him about it again. Thanks!

Tiny
TheHatedPathfinder
Jul 17, 2012.
Loosen the bolts at the exhaust manifold on both side enough to allow it to breathe.

Roy

ASEMaster6371
Jul 17, 2012.
He told me he did it right, but I went ahead and asked him again and showed him your reply (XD) and he told me that "YES" he did that. Thanks for the reply!

Tiny
TheHatedPathfinder
Jul 17, 2012.
Any help would be appreciated!

Tiny
TheHatedPathfinder
Jul 20, 2012.
Have you changed your IAC motor on the engine. You can take it out and c if its got carbon built up on it or it could just b bad alltogether. Let me know if this helps.

Tiny
Catfish scheufele
Jul 27, 2012.
Thanks for the reply!

First I want to add that the idling problem has pretty much disappeared. (My guess is after running the last of the fuel injector cleaner through it) But, I just wanted to add that cause I was thinking that might be why you said to check the AC motor. My dad are going to try and get it off to check tomorrow but I have something to add that might help in the troubleshooting process.
The 'new' information is just something that I kinda forgot about and we are starting to think that this may lead to the problem.

Cylinders 1, 3, and 5 do not affect the engine when they are removed when both idling and revving it up. It has new spark plugs, wires, cap, rotor, and we tried a working distributor out of my aunt's Xterra. The wires are getting fire to the new plugs, and the plugs are getting fuel. We also double checked to make sure the rotor was in the right 'position'. Also 2, 4, and 6 'act normal' when the plugs are pulled.

Thanks in advance!

Tiny
TheHatedPathfinder
Jul 28, 2012.
Have you done a compression check on those cylinders sounds like you have a head problem.I own a garage I would like to c u get this fixed let me knowing there's anything else I can do for you.

Tiny
Catfish scheufele
Jul 29, 2012.