Question about 2000 Volvo S70

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2000 s70 is surging but idles fine. I think I need to replace the fuel filter. Are there any other possibilities I should look at?

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I would replace the fuel filter, air filter, and plug wires, that should take care of the obvious culprits

Posted on Aug 27, 2010


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My truck is surging at highway speeds gets worse to the point of cutting out some in city driving but idles fine.

I'm not specifically familiar with your truck, but I would check with a dealer to ensure there is no inline filter before taking the part store's word for it. While most vehicles have a pick up filter in the tank for big stuff, I've never seen a car without an inline filter for micro-particulate. The part store you called may simply not carry it, or may carry a desk help person who doesn't know what they're doing (happens all the time). Other possible issues for your surging could be that you have a sticky injector that isn't opening/closing properly, that your automatic trans is acting up (if you have one), or a pressure regulator in the lines (my wife's car also does this because the part that is supposed to hold fuel pressure in the line is bad (as a result it starts hard unless you let the pump "prime" the pressure just before starting) and so it surges just a little with the fuel pump's cycling when driving at freeway speeds. I think you're on the right track with an inline filter though and would try that first.

Nov 13, 2013 | 1995 Dodge Ram 2500

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1999 pontiac sunfire 2.2 - engine idles fine, engine accellerates fine untill 3,500 rpm then rpm drops to around 3,000 or so then surges back to 3,500. i hold the throttel steady as this is happening....

Hi Fuel pump pressure test and Flow test (a wine bottle (75cl) should fill in less than 30 seconds).
ECU could be in limp home, my advice ask a technician for his help. Kind regards David

Dec 25, 2017 | 1999 Pontiac Sunfire

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I have a 1998 Volvo s70 it starts fine it idles fine but when I pull off it's very sluggish or draggingthe longer I drive the more it slows and bogs Down it shifts all gears so its not the...

It could be the converter. The MAF sensor was a guess, because that often is a cause of loss of power. Other possibilities are a dirty air filter, or a partially clogged fuel filter, or a fuel pump/pressure regulator problem not allowing proper pressure at the engine's fuel rail. And that's the short list.
The easiest way to check the converter short of disconnecting it and testing operation of car without it hooked up is with a pocket IR thermometer laser temperature reader. The car needs to be at normal operating temperature-say after a 20 minute run time. Measure the temperature of the exhaust pipe entering the catalytic converter and the pipe leaving the converter. If the exit temperature is about 100 degrees hotter than the entry temperature, the converter is probably good. With a plugged or failing converter, the exit temperature will be the same or lower than the entry temperature.
If the converter is good, check your air filter, fuel filter, and have a free scan test done at AutoZone of your engine's computer (OBD2 fault scan test). There might be a trouble code pointing to the problem, like for example, the MAF sensor.
Good luck. Post back if you need further assistance.

Dec 02, 2011 | 1998 Volvo S70

1 Answer

2000 Volvo S70 Starts then dies. Seems to do it more often if the engine is warm. Wait 10 minutes and it starts and runs fine.

Fuel pumps are common on these cars. Its a hard fault to duplicate with a gauge because they rarely die at idle! I would still connect a gauge and see pressures though, see what happens to them when it starts to die (if it will at idle). 99/100 times you need to replace the fuel pump, and fuel pump relay. The relay overexcites and burns out your fuel pump. As long as you dont have AWD its not a difficult job, if its AWD then you have to lower the whole back end of the car (springs, diff, AOC....) to lower the tank enough to get to the pump. Make sure that you align the pump correctly or you will have a false fuel level reading.

Dec 15, 2010 | 2000 Volvo S70

2 Answers

2000 volvo s70 difficult to start, more so as fuel level drops. Cranks fine. Recently changed MAF sensor, B+ cable, plugs, fuel filter - no improvement.

Sounds like the fuel pump, as the levels of the fuel tank drop, there's less natural pressure on the fuel, which would definitely make it harder to start with a weak fuel stream from a bad pump.

Dec 04, 2009 | 2000 Volvo S70

2 Answers

2000 Volvo S70 GLT SE

You must drain the tank remove from the car flush it out with pump and screen out of it you will need
a list or car jack and several stands change the screen and fuel filter also . Good luck

Mar 09, 2009 | 2000 Volvo S70

1 Answer

Car runs fine at idle but wants to surge

there is a fuel pump inside the tank that is bad replace it

Jan 01, 2009 | 1988 Nissan 300ZX

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