A4 (B7 Platform) Discussion Discussion forum for the B7 Audi A4 produced from 2005-2008.5

Ignition Problem

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Old 01-01-2006, 01:45 PM
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Default Ignition Problem

When I turn the key it cranks for a second or two before the car turns on. Even my dads 2001 Dodge Caravan starts pretty much instantly.

Is this a problem that I have or are all the A4's like this?
Old 01-01-2006, 04:38 PM
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Default Its a problem

Car starts right away. All Audi's Ive driven have started right away.

Are you keeping your tank full in cold weather?
You can clog the injectors otherwise
Old 01-01-2006, 05:16 PM
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Default Is this happening only in cold weather? My A4 has been in the shop for this for 19 days now.

Tomorrow makes 20 days.

Right now, Audi has no idea what is causing the problem on my car. One other member fixed the problem by replacing the fuel pump with version F - apparently a TSB was just released for this.

Take the car if for service. It should start without hesitation.
Old 01-01-2006, 09:15 PM
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Default All the time

Its happening all the time, hot weather, cold weather, full tank of gas, no gas...

My first audi experience isnt going too well I have a HUGE list of problems...
Old 02-20-2006, 01:34 PM
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Default Re: Ignition Problem

Your hard starting issue has been bugging me. I finally found the reason which is inherent in the redesigned A4. A vapor lock situation can occur which results in the need to "crank" the engine longer than the older models. Here's the commentary as well as the designed in "solution" to the issue caused by the new FSI technology:

One other technology advancement of note is the fact that the fuel system is primed when you open the driver's door. The fuel lines sit low on the engine, and because the injectors are squirting into the cylinders instead of behind the valves they are more susceptible to a vapor-lock problem. By priming the system up front, cranking times can be reduced. There is also no fuel line return line, so vapor that might build up from a hot soak situation can be put under high pressure thereby further reducing the effect of vapor-lock while starting the engine.
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