Question about 1999 Nissan Pathfinder
I just bought a 1999 Nissan Pathfinder 6cy automatic. While accelerating I have noticed a surge right before upshift. Also while holding a steady speed there is a hesitation that causes the car to ****. It stops when accelerating or slowing down but holding steady is the issue. Not really bad at fast speeds (50+) but right around 40-50mph its horrible. The dealership replaced the fuel pump and filter. Plugs and wires. Cap and button. The MAF sensor and the air filter. The check engine light came on yesterday and i took it to the shop where it read a lean fuel to air ratio. Also engine has started to tick when accelerating. Did i just buy a peice or junk or is this an easy fix?
remove the front 02sensor and drive the car like that, remove means complety take it apart from exaust, if problem goes away or gets so much better then your catalitic converter at the exaust is restricted and need a new one
Posted on Jun 19, 2008
you have two different problems. first your gauge may have a bad ground or bad sending unit . try fuel injector cleaner as they may be gloged for hesitation .
Posted on Mar 11, 2009
SOURCE: Will the MAF sensor cause
Good Evening, if your truck runs fine at idle it would make me wonder about the mass air flow sensor, however when you first start it your idle air control sensor should open up and let your vehicle to idle up to warm idle and then back to normal. So there are a few things to check.
Posted on Sep 15, 2010
SOULDS LIKE EXCESSIVE EXHAUST BACK PRESSURE CAUSED BY A RESTRICTED CAT CONVERTOR. SHOULD HAVE NO MORE THAN 1.5 TO 3 PSI CHECKED AT THE O2 SENSOR AT IDLE AND AT 2500 RPM. THE CONVERTOR CAN BECOME DAMAGED IF UNBURNT FUEL ENTERS IT. THIS IS CAUSED BY TUNE UP CONCERNS USUALLY.
Posted on Oct 06, 2010
SOURCE: Vehicle: 1998 Nissan Pathfinder
When the MAF on most vehicles reach a point of preventing the engine from starting, you can usually just unplug it and the engine will start. If that doesn't work-
You may want to try having the O2 sensor, ( Oxygen sensor ), checked. It works with other components of the emission system and can cause similar symptoms as the MAF, including preventing the engine from starting.
Posted on Feb 21, 2011
Testimonial: "Other similar issues are the cam position sensor, which is located inside the distributor. It's easier to just replace the distributor."
Tips for a great answer:
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Nissan Pathfinder Backfires? http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-backfires.html
---------How to adjust rpm? http://schematicsdiagram.blogspot.com/2011/12/how-to-adjust-rpm-on-2009-dodge-charger.html
------------Engine cuts out at 3000 RPM? http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html
----------This will help.Thanks.
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