1998 nissan maxima gle cuts off every once in a while mostly when i slowing down speed or stopping and even sometime when driving.....I have took the EGR valve off and the egr solenoid valve off and both seem to pull vaccum jus fine.....also looked in tha throttle body and appears to be clean...all vaccum lines checks out and i hear no vaccum leaks when the car is running does anyone know a possible solution to this stubborn *** problem.....thank you in advance for any response!!
A good vacuum chamber doesn't mean the egr valve isn't sticking or leaking.
The recorded fault might have nothing at all to do with the periodic stalling. The management system should maintain the idle at the programmed speed by constantly adjusting the idle air flow through the idle air valve or equivalent. Perhaps it is sticking or not responding quickly enough or perhaps it takes too long to establish a stable idle due to other factors such as poor injector spray patterns or a tired oxygen or other sensor...
SOURCE: our 1995 nissan maxima started running really ruff,
http://www.autozone.com/az/cds/en_us/0900823d/80/1f/4e/28/0900823d801f4e28/repairInfoPages.htm
http://www.autozone.com/az/cds/en_us/0900823d/80/1f/4c/a2/0900823d801f4ca2/repairInfoPages.htm
http://forums.maxima.org/4th-generation-maxima-1995-1999/562989-egr-valve-issue.html
SOURCE: 2.5l iron duke will not idle
Scan again & check reading of the ECT sensor,coolent sensor as it may be reading to cold for present temp & just dumping fuel as it is seeing -30c all the time.I as well own a iron duke(1987)
SOURCE: i am getting p0400 and p 0402 codes
Check the EGR air passage tube again.
You may miss some on the first pass.
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Check for
vacuum leaks on intake manifold,
the air tube between the air filter.
intake manifold vacuum hose.
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clean throttle plate with Berryman carburator cleaner
SEE sample picture HERE
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Also remove carbon built up behind the EGR valve and the EGR passage tube.
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Vacuum leak WILL offset the intended 14.7 to 1 air fuel ratio.
More un-metered air (leaks) will lean out the fuel mixture.
Use small amount of Berryman carb clearer at potential air leak area will help you identify trouble spot.
At idle,just spray and listen for the RPM surge.
The in-rush of carb clearer will increase the RPM on the motor.
Record the problem spot(s) and address it later.
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EGR carbon built up require 2+ hours to clean from start to finish.
You will need a new EGR base gasket before your start.
Locate and remove the EGR valve after the vehicle is cool down.
Carefully record the connector and vacuum line (for older vehicle) location by drawing an easily to follow diagram.
Remove the EGR valve.
Inspect the location of the carbon built-up inside the valve and the EGR passage tube.
SOAK these areas with WD-40 spary.
You will need a small screwdriver,cloth hanger and lot of newspaper and time to get this cleaning done right.
RE-SOAK the carbon and let it sit for over-night will also help.
One the last round,pass a shop vacuum of the EGR valve and the passage pipe.
Install the new EGR gasket and connectors.
Allow the vehicle to warm up outdoor to burn up any remaining WD-40.
Take it for a test drive.
Please rate my answer if it's useful to you.
Cheers,
Mustgo
SOURCE: engine misfire under load. cleaned throttle body,
Pull the code. It will either be a P0301 P0302 P0303 etc. all the way to a P0308. This code means that you have a missfire and the last number is the cylinder with the miss. Get the code and then change the coil for that cylinder. While your there pull the plug and I gurantee that you need plugs after you see the condition of the plug. Then at that point pull all the plugs and replace. But these Fords are known for having bad coils. Each cylinder has it's own.
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