Question about 1999 Audi A4

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Rough idle hesitation on acceleration dies

Car starts but runs rough,hesitation when accelerating,sometimes dies

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  • Matt_VWGTI Apr 25, 2014

    Hi Shylo Dooley, I want to help you with your problem, but I need more information from you. Can you please add details in the comment box?

  • Howie Snyder
    Howie Snyder Jun 01, 2014

    Coils

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 6 Answers

SOURCE: no acceleration,audi 1.8t,runs like no boost

have you tried cleaning out the throttle body as i had a similar problem and this worked

Posted on Nov 29, 2008

j_del
  • 1586 Answers

SOURCE: no acceleration,audi 1.8t,runs like no boost

It's possible that the diverter valve (DV) has failed. The OEM valve has a plastic diaphragm inside and it can crack. If this happens, the car will leak boost air and will lose power as a result. Go to www.audiworld.com, click on Resources, then Tech, and then go to the engine article about replacing/upgrading the diverter valve - it'll show you where it is and how to do it.

Posted on Mar 27, 2009

alicantecoli
  • 22095 Answers

SOURCE: Audi A4 - Strong vibrations while accellerating and while idling

If it had points and carb i could diagnose it but with all this computer control stuff it could be anything from a faulty sensor to a dodgy fuel pump or evan a multiplug loose .i would suggest the dealer to diagnose it sorry i cant be of much help but evan the software is encrypted and the vehicle has to be connected via the internet to stuggart

Posted on Jun 06, 2009

dnewcombe1
  • 1564 Answers

SOURCE: 1998 Audi A4, engine shakes/runs rough sometimes

It sounds more like you've got an intermittant vacuum leak. Try, with the engine running, spraying some WD-40 or any kind of penetrating lubricant spray,over the intake manifold area and any related vacuum lines. If you hear the engine strat to stumble, providing you're not shooting directly into the air box, concentrate the spray on that area until you're able to pinpoint a loose, cracked. or off, vacuum line or hose.

Posted on Aug 22, 2009

  • 14036 Answers

SOURCE: hesitation in acceleration with no check engine light

MOST TIME CAR STUMBLE OR HESITATION ON ACCELERATION YOU.HAVE A SLIGHT LEAN FUEL MIXTURE.CAUSED BY STOPPED UP FUEL INJECTORS OR FUEL FILTER SLIGHTLY PLUGGED.

Posted on Jun 07, 2010

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Mar 22, 2014 | 1999 Audi A4

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Idles roughly, then low when stopped or in park, then dies. Decreasing gas mileage. Slow to accelerate


Sometimes that's caused by a vacuum leak near the manifold area.

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Hard to start, dies, missing out, hesitation, low rpm take off missing out


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Dec 13, 2013 | 2000 Chevrolet Silverado 1500

1 Answer

Hesitates on acceleration


Does the car always hesitate during acceleration? If it ALWAYS struggles when it starts or ALWAYS hesitates on acceleration then I would say the issue is fuel delivery. If the problems are more intermittent and come-and-go then it could be an electrical issue.

I would start by changing the fuel filter. Changing plugs, wires, cap, and rotor are all good things to do as your budget will allow. I doubt you will have to change your injectors.

If you end up replacing any rubber fuel line, be sure to use the high-pressure stuff made for use on fuel injected cars.

I hope this helps! -Nick

Apr 10, 2009 | 1983 Chevrolet Chevy

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