gas milage

[gutterguy]

Hello, I am new to this forum and need some help. We have a 1999 Nissan Quest and recently our fuel milage has gone way down. I have replaced the spark plugs and the air filter, does anyone have any other suggestions that may help?

[Fred95GSX]

O2 sensor.

[Mark Peltier]

Our 99 Quest recently was exibiting poor gas milage as is yours. Then about a week ago there was very poor acceleration to go along with it. After a week at the dealer (Who did a lot of head scratching) the problem was traced to a rust clogged exhaust pipe forward of the catalytic converter. If you start to experience poor exceleration you may have the same problem. Dealer said that the pipe has a sleeve and when it started to rust it slowly constricted the exhaust flow which affected gas milaege and slowly was choking the engine till it robbed power. ($1,100.00 repair, ouch) I hope yours is a simpler problem. Good luck and let us know what you find.

Mark

[Fred95GSX]

$1,100!!!! I hate dealerships. Please tell me your van was still under warrenty. Please.

[Mark Peltier]

I wish it was, I had to bite the bullet on this one. I originally had the van at an auto repair shop that a neighbor works at and they could not trace the problem. I had no choice really but to go to the dealer. The van has 120,000 miles on it and is 5 years old. This is the only expensive repair we have incured in that time so I am not to broke up over it. The dealer had the van for two weeks and only charged us $87.00 for a rental car for the duration. It now runs great, it still looks great and a new car or van (This one is paid for) would cost thousands more.