ZUKIWORLD Online | Suzuki 4x4 Editorial and Forum
ZUKIWORLD Discussion Forum => Suzuki 4x4 Forum => Topic started by: Mowcheeba on September 02, 2008, 09:08:49 AM
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I don't have much experience when it comes to cars and engines, so if you experts could
help me out I would appreciate it.
When accelerating heavy or going over 2000 rpm the engine shuts down.....the car stops.
Very frustrating as you could imagine, so now I can only drive with very low RPM and can't
go more than 40 km/h.
What could it be? And what can I do about it?? If I get some guidline maybe the mechanic can fix it.
The mechanic said that I would have to take the care to a Suzuki dealer that could connect a computer
to find the problem.
But going 40 km/h that would mean a 2 1/2 hour drive to nearest Suzuki dealer.
Please help....It is a Renault 1.9 cc Diesel engine,
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To me it sounds like a fuel problem, could be that your tank is not venting, or your fuel filter is clogged, or you have a small hole in the fuel line in front of your pump, and last it could be your pump but try to look at the other stuff first, it's cheaper.
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I'm with mrfuelish, it sounds like a fuel issue. When was the last time you replaced your fuel filter on that diesel?
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x3 fuel problem. Check fuel filter first, lift pump second (if your rig has one), and injection pump 3rd. Air bubbles in your fuel line will cause the symptoms you describe as well; if you have no lift pump, make sure all of the fuel fittings are tight between your injection pump and your fuel tank.
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I had a similar situation occur with a clogged catalytic converter.
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Thank you for your replies. Well, the mechanic cleaned the fuel filter 2-3 weeks ago and
the problem did not go away. I got a new fuel filter installed about 6-7 months ago.
I'll tell the mechanic to check the entire fuel line, hopefully there is no serious problem
with the pump.
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x3 fuel problem. Check fuel filter first, lift pump second (if your rig has one), and injection pump 3rd. Air bubbles in your fuel line will cause the symptoms you describe as well; if you have no lift pump, make sure all of the fuel fittings are tight between your injection pump and your fuel tank.
I'll look for air bubbles in the system. Had problems about 6 months ago, difficult to start almost like
there was a weak battery. This turned out to be caused by air bubbles in the system, the mechanic
changed fuel filter and installed new tubes.
I'll check the lift pump and injection pump, hopefully the problem is there.
Thanks,
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I had a similar situation occur with a clogged catalytic converter.
Thank you, I need all the input I can get. Maybe this is the problem...
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i dont think they put catalytic converters on diesel engines.at least i never seen one
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X4 Plugged Fuel filter
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i dont think they put catalytic converters on diesel engines.at least i never seen one
I was actually wondering about that as I typed; got very little diesel experience. Figured I'd mention it anyway, though.
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If I get this right, you all mean the engine doesn't get fuel fast enough due to
some problem in the fuel line. Would I be able to support this by checking what happens
between the fuel filter and the engine when someone is accelerating? I have transparent
tubes so I can easily check for air bubbles or slow flow after the fuel filter...
How is the fuel line after the fuel filter? Injection pump.......engine?
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I'm not a diesel mechanic or anything, but I had the opportunity to troubleshoot a bajillion fuel problems when I swapped the diesel into my sami, and then some more when I did all of the injection pump mods and the turbo swap...and I've done injector and injection pump swaps and a fair amount of troubleshooting on a few pieces of heavy equipment and pickups. It's been my experience that 95% of the problems with diesel engines are fuel related. Also, let me preface this by saying that I'm not familiar with the Renault 1.9L diesel; I've never even seen one. So I don't know the specifics of your particular engine. But the troubleshooting and fuel system info does apply to pretty much every diesel engine out there.
Basically your fuel system works like this:
The diesel in your tank is pushed from the tank by the lift pump (not all diesels have these, but most do). The lift pump is a small, low pressure fuel pump that provides a positive pressure to the injection pump to keep it from working too hard by "sucking" the fuel all the way from the fuel tank. This pump also helps protect against air bubbles by providing a positive pressure in your fuel system...if your lift pump is bad then the smallest loose connection or pinhole leak will introduce air into the lines as the injection pump "sucks" the fuel from the fuel tank. These air bubbles can be too small to see through fuel lines...enough of them can aerate the diesel fuel and cause the engine to run poorly or not at all. Assuming your fuel lines are tight, your lift pump is working properly, and no air is being introduced into the fuel system, the next component in the fuel path is the fuel filter; if it becomes clogged (which happens quite often with poor fuel or after switching to biodiesel) it will starve the injection pump of fuel when it needs it (at higher loads and RPM's). The symptom of this is a loss of power or "dead pedal" when accelerating.
Next is the injection pump itself; it takes the fuel from the fuel line and pressurizes it to a very high pressure to send through the injectors at specific times (this is how a diesel engine is "timed"). The high pressure is why the fuel lines to the injectors are metal. Genrally, injection pumps are not servicable by even skilled mechanics. Although the timing, fuel pressures, and idle speed are adjustable, the inner workings of the injection pump are best left to diesel specialists. If it is bad, your engine can also show a loss of power, and even not run at all.
The injection pumps are by far the most expensive component to replace, both in cost of parts and labor. So, I'd start by eliminating everything else. The best thing to do would be to get a manual for this engine and follow the procedure for doing a volume and pressure test for the lift pump (I'm assuming you have a lift or transfer, or whatever renault calls it pump either in or somewhere near your fuel tank). Basically this involves removing the fuel inlet line from the injection pump and running the lift pump for a specified amount of time into a cup. If the filter is good and the pump is working properly, you'll get the correct amount of fuel into the cup (again though, I can't tell you what this volume is as I don't have any specs for a Renault 1.9L diesel). The pressure is checked with a fuel pressure gauge.
Although watching the fuel line while driving the vehicle might tell you something, my guess is that you're not going to see anything but fuel moving through there...and there's no way to gauge how fast or how much fuel is moving, and if that's enough for the injection pump, or if the lift pump is working.
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Is this an ECU controlled engine, turbo or normally aspirated? Do you have an EGR valve?
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Is this an ECU controlled engine, turbo or normally aspirated? Do you have an EGR valve?
Please help....It is a Renault 1.9 cc Diesel engine,
So, it pretty much HAS to be a fuel problem right?