VioletA Posted August 7, 2013 Share Posted August 7, 2013 I have a 2001 Nissan Pathfinder LE and I have not had any luck with this truck since I bought it 4 years ago.. Its now has roughly 173,000 miles on it...anyways We have a rear main seal leak that I am getting taken care of at the end of this month and I just had to replace the starter. And the muffler system had corroded at the flange of the tail pipe (rear muffler) so I had to replace that as well...I bought a Bosal Y Muffler system and just had it installed now my Suv is running funny not for sure if its a coincidence that it happened at the same time but this is what its doing: Feels like the idle is off, when I put it in Reverse or drive it vibrates and shakes but I feel it through the driver seat and the pedals, also some loss of power on the hwy its a struggle to get up any hill. My first thought was the muffler system and possible back pressure but I took it to the muffler guy and he said everything looked fine. Also I notice the new exhaust system I bought is not the same size as the OE and I asked if that could cause that vibration and he said no but he suggested that I do a tune up and have my spark plugs changed.. All I know is that it was not doing that before I had the new system put on..The size of the new muffler is quite smaller would that cause a problem later on down the road a? I'm contemplating ordering a different system to put on my SUV Also I have been having a check engine light come on but its nothing to do with the exhaust but it is in emissions its the Code P1491 Vacuum Cut Valve Bypass Valve I was wondering if fixing that issue is an easy job? Beings that its with the fuel system? And could that code and issue cause my truck to lose power or idle funny? We are going to attempt to fix it ourselves it seems pretty straight forward from what I read but I am inexperienced and will be going off of what I read and advice from others so any help will be greatly appreciated...Also I was wondering if you can change spark plugs as first timers or is it a job for an experienced mechanic? Link to comment Share on other sites More sharing options...
VioletA Posted August 7, 2013 Author Share Posted August 7, 2013 I just found this forum on the issue I am having but would still like suggestions and advice http://www.nissanpathfinders.net/forum/topic/11442-how-to-replace-evap-canister-and-valves/ Link to comment Share on other sites More sharing options...
badfish Posted August 9, 2013 Share Posted August 9, 2013 Sounds like the trouble your having is with the evaporative emissions and not with the exhaust. The link you found is a great set of detailed instructions. Doing this yourself will save you a ton of money! You should start with the spark plugs. If you've never had them done since you've owned it, then they are probably due. This is also a great indicator of weather or not you should tackle the evap can! You should buy a Hayne's or Chiltons repair manual specific to your car(about $30). They give really good step by step instructions and list the tools you'll need as well as photos and diagrams. I hope this helps! Link to comment Share on other sites More sharing options...
Towncivilian Posted August 9, 2013 Share Posted August 9, 2013 I don't advise buying a Hayne's or Chilton's manual when the factory service manual and very detailed guides are available on forums such as NPORA and NICOclub. Spark plugs have a 105k mile interval, and 173k is close enough. I'd replace them with the proper OEM specified NGK plugs. There's an excellent, thorough pictorial guide on spark plug replacement on NICOclub. Welcome to NPORA! Link to comment Share on other sites More sharing options...
badfish Posted August 15, 2013 Share Posted August 15, 2013 I don't advise buying a Hayne's or Chilton's manual when the factory service manual and very detailed guides are available on forums such as NPORA and NICOclub. Spark plugs have a 105k mile interval, and 173k is close enough. I'd replace them with the proper OEM specified NGK plugs. There's an excellent, thorough pictorial guide on spark plug replacement on NICOclub. Welcome to NPORA! FSM is available for free? Please enlighten me! Link to comment Share on other sites More sharing options...
SkiBumBrian Posted August 15, 2013 Share Posted August 15, 2013 Go to the forum home page, then to the Garage and scroll down to the FSM downloads, its that easy! 1 Link to comment Share on other sites More sharing options...
ahardb0dy Posted August 16, 2013 Share Posted August 16, 2013 is the new muffler smaller in overall length or the pipe diameter? If the muffler body is smaller than stock it will probably just make the exhaust louder, if the pipe is smaller diameter it could cause a restriction and you should get the proper diameter muffler. Do not think the muffler is causing your problems though, Have you hecked the computer for any codes? A full tune up would be a good idea if one hasn't been done, also check your air filter. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now