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Sparkplugs not burning fuel - 1998 Volkswagen Passat

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Ignition coil/coil pack malfunction
Ignition control module malfunction (ECU)
No fuel pressure, malfunctioning fuel pump
Fuel pump relay malfunction
Immobilizer activating cutting fuel and ignition, part of anti-theft feature (a key icon present on dash)

Posted on May 03, 2010

  • Ed Paje May 04, 2010

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Did a tune up on my 91 dakota, but still burning lots of gas. change wires, sparkplugs, cap, rotor, and oxygensensor but still burning gas out the tail pipe


Try running fuel injector cleaner through the gas tank. A fuel injector might be stuck open, letting lots of fuel into the engine. Also try replacing your fuel pressure regulator, and inspect the fuel tank return lines.
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Hello;Are there any service lights on in dash?It could be that the fuel pressure valve went bad,causing it to get to much fuel, and thats were the black smoke is coming from.

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Hi! Try replacing your sparkplugs. It may be full of carbon and causing a reduction in fuel economy. New sparkplugs can perform better fuel burning. Hope this helps

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your sparkplugs might not burning all the fuel thats why its flooding. try changing your sparkplugs for better burning

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first of all change spark plugs to the standards of the car ,, maybe you have bad spark plugs .. does your car have a white smoke in exhaust ? if so then its something has to be replaced inside 2 and 3 cyclinders thats an advanced failure
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sound like you have a bad fuel pressure regulator . check your fuel pressure. could also be a leaking injector. the fuel pressure test will tell you which one

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