Question about 1993 Nissan Altima
While driving fuel just cut off,i have change the gas filter still the same problem.
Your first place to start is to see if you have pressure from the fuel pump. With the key on but car not running you should hear a buzzing sound from rear of car near the fuel tank. If you do hear this it is a good sign but you still need to make sure you have good fuel pressure to the injectors. Remember any time you open fuel lines(even for a filter change ) you need to purge the fuel system of air that has gotten into the system. You can do this easily by turning the ignition switch on(do not start) and off several times. This allows the pump to pressurize the fuel system. You can get a goo idea if you have good fuel pressure by taking off the inlet line to the filter and checking for feul flow there. For the Nissan you should be 40 PSI. give or take a pound.
Posted on Nov 17, 2008
There is an Idler valve near the intake that can be adjusted. that valve may be worn out and need replacing.
Posted on Oct 15, 2009
Testimonial: "I need more info then that I still do not see any Idle valve that can be adjusted. I have test The IAC valve and it ohms out correct. "
Sounds like an idler issue, adjust it first before doing anything else.
Posted on Oct 15, 2009
Testimonial: "I need more details then what you gave please."
Take an analog ohmmeter, remove connector from TP sensor, and touch probes on terminals of sensor, try combination of 2 until you see reading increase as gas pedal pushed & decrease as pedal released by someone, while engine off, and key off.. Have them slowly, & gradually push pedal, as you watch meter. Reading should increase slowly & gradually as well. If you see it climbing, then quickly drop off, then jump back up, it's faulty. Try to concentrate more on the position of gas pedal where you experience the engine cutting out. Costs nothing to try it.
Posted on Oct 16, 2009
Testimonial: "thank you excellent help"
Your car could cut out for many reasons. Here's the reason and solution to my own pathfinder cutting out:
One day, out of the blue, my Pathfinder engine cut out as I started to drive. It then cut out randomly. The way it was failing 'felt' electrical in nature, like a connection was going bad.
So, I'd start the car and quickly run out and start tapping on all things electrical. The MAF, or Mass-Airflow Sensor (not to be confused with MAP, the manifold air pressure), is located on the front airbox-airtube assembly and was a natural to tap on. The instant I tapped on it, the car died.
Did it again, and again, and again. The Mass Airflow Sensor was to blame.
I looked at the prices of these buggers, and they were in the $300-$800 range.
For that price, I'm going in!
I removed the MAF sensor by unscrewing the 4 screws.
I then managed to gently pry it open. What I found was a little control board encased in a jelly, presumably to isolate the board from the elements, and three little thin wires leading to the external connector. Without even having to break out the multimeter, I could tell that one of the wires had broken due to vibration fatigue or some other manufacturing defect. I recall I had to break all three wires to get the thing to open fully.
Soldering this was very difficult due to the presumably silicone jelly. It made the metal very resistant to bonding with solder. Without digging too much into the jelly, I exposed all wires and eventually, with scraping, fire, and flux, managed to get solder to stick decently to the various wires, adding my own jumper wires to make it easier to bridge the gap and close the case.
I needed to make this fix road-worthy, so I folded their wires around an insulating piece of clear plastic I cut from some plastic packaging material. The wires folded nicely into place and the case closed.
Several years later, the fix is holding strong.
Posted on Feb 02, 2011
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