Question about 2002 Nissan Altima
This is likely to be the fuel pump.
Have a scan on the car before you make any replacement.
Posted on Jul 26, 2009
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Posted on Jan 02, 2017
It sounds like a fuel problem as opposed to an electrical fault. Start with the easiest fixes first ..
The next time the car comes to a grinding halt quickly remove the petrol filler cap and listen for air rushing into the tank. If you can hear air rushing into the tank that means a vacuum has been created inside it.
There are 2 causes of a vacuum inside the petrol tank. One is that the air-valve in the filler cap is blocked (there's usually holes in the filler cap covered by a rubber type ring) and the other is that the breather tube from the tank to atmosphere becomes blocked with dirt and debris thrown up by the roadwheels. Try driving the car with the fuel cap removed or very loose so that air can easily enter the tank. If the car still comes to a halt with the same symptoms, then there isn't a vacuum being caused within the tank.
A failing fuel pump can cause the same problems. I once owned a VW that had the symptoms you describe. The in-tank fuel pump was 'on its last legs' and when replaced the car was perfect.
A blocked fuel filter can also cause the same problems.
Here in the UK the Volvo 960 is either a straight-six 2.5 litre or 3 litre engine. I would guess that Volvos in North America share a pretty much the same mechanical layout depsite model differences. A UK 960 has two fuel pumps. One is located within the fuel tank and is accessed via an inspection plate behind the rear passenger seats (estate/station wagon models). The other fuel pump sits in a bracket underneath the car alongside the fuel filter, just aft of the front passenger seat (driver seat in the US..).
The in-tank fuel pump does most of the work, lifting the fuel out of the tank. The under-car pump lifts the fuel to the engine (it shares the same fuel line). Start with the easiest fixes first - is there a vaccuum in the tank that 'slows'/'holds back' the fuel? Then look at the fuel filter which is supposed to be changed every 40,000 miles.
If it's of any use to you, I've put some photos of the fuel pumps and fuel filter on my own website - www.glennsmart.btinternet.co.uk Just choose 'Volvo 960' from the drop-down menu.
Posted on Sep 20, 2008
When the ignition switch is turned on the pcm turns on the fuel pump by energizing the fuel pump relay. The PCM keeps the fuel pump on as long as the engine is cranking over or running.It does this by recieving pulses from the ignition module. If there are no referance pulses the PCM will turn the fuel pump relay off in 2 seconds with the ingnition on.
Most models also include a secondary control path through the oil presure switch witch will turn the fuel pump on after it detects oil presure.cranking time will be longer if the fuel pump doesn't recieve current until oil presure switch contact is closed.
Posted on Jan 28, 2010
Need to have the fuel pressure checked at fuel rail to know for sure if there is a fuel pressure problem for sure. There may be a in line filter as well, you can also do a check of the pressure regulator by pulling the vacuum line off of it then try starting the car with it off and see if it runs, if it does the regulator is bad, but IF it doesnt run doesnt necessarly mean it is good, a lot of fuel filters have a bypass wich allows the gas to bypass the filter when it is full bad thing is the debris can then plug the injectors causing problems, or there could be a loss of signal to tell the injectors to give fuel to the cylinders from an electrical or a sensor failure. So it is best to test the pressure to know for sure if it is in the fuel line or the injectors if it is truly being starved of gas. hope this helps
Posted on Apr 13, 2010
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