Question about 2000 Volkswagen Jetta TDI

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I too have a 1998 jetta with a cold/does not start problem. The temp is in the low 20s, I do use Biodiesel but very little lately. It might be air in the fuel line because I do see a gap in the line leading to the fuel pump. I tried filling the line with ATF and the filter with Diesel/ATF, but the ATF in the line seems to retreat back in the direction of the filter. How does one bleed the line if the engine won't even turn over. Could you recommend a block heater for the winter season? KG

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  • kgardener Dec 09, 2009

    So I'm sucking fuel from the filter in order to fill the line with fuel? What I did was using a syringe I shot ATF through the line and into the inj pump then quickly replaced the hose. That's when I saw the fuel retreat back to the filter. Maybe new lines will eliminate the possibility of the air.

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You can insert an electrical (12V - battery to supply) block heater for winter season in upstream of fuel filter.
I too have a 1998 jetta with a cold/does not start - 775d2a7.png

Posted on Dec 09, 2009

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The car should not have any real issue firing up in cold weather. I would look into the glow plug system for a problem. Have you tried cycling the plugs ?? (key on until GP light goes out, key off, and repeat 2 or 3 times). If you think there's an air problem, replace the lines, they're cheap (unless you get em' from the dealer). The way I have re-primed the inj pump is by taking off the return line from the pump and using a mighty vac or equivelent pumping until I get all fuel and no air. There are 3 popular block heaters to choose from. One goes in place of the dipstick, this is probably the easiest, one is a magnetic oil pan heater, but we have aluminum oil pans so no good, and another is an in-line coolant heater that splices inbetween a radiator hose. Google frostheater for a very nice setup.

Posted on Dec 09, 2009

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Please help me with my air conditioning for my 1995 jetta


HI, giving the compressor 12v directly is not the way to go as you are bypassing the entire fail safe cercuit. it seem to me that your ac gas is low(can be checked via ac pressure gauges) wich means you have a system leak sumwhere. as soon as your hi/low pressure switch(depending on system) detect inferior pressure to the spesified pressure ,the ac compressor voltage is cut in order to protect the pump from seizure.

Or perhaps your evaporator(small radiator like unit behind dash) can get freezed up caused by either too mutch system gas(check pressure) or poor opperation of the expantion valve. the evaporator then has a sensor(themometer) wich measures evap. temp and if the value drops below spec (usially round about7degrees) the ac compressor will be cut once again(fail safe)

Maybe your ac compressor overheats due to inferior system oil/oil capasity, also note that only some systems incorperate the function of measuring ac pump temp. then again temp to high= fail safe=no12v to ac pump.

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