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6 votes
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Is it bad to continuously turn cruise control on and off?

The cruise control on a modern car is totally electronic – obviously it has to interact with the car's controls, but no more so than would happen in "manual" driving. There should be no reason why you ...
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5 votes
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Can improper coolant concentration increase coolant temperature?

The coolant ratio does affect how the system cools the engine, but probably not as you'd think. Water is a better thermal conductor than is the antifreeze, so it will do a great job of shedding the ...
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3 votes
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Tell tale signs of a valve cover leak?

You are right about leaks in that the liquid will flow down from where it leaks at. In your case it is really hard to tell exactly where it's coming from, but would suggest you are right about the ...
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3 votes

Do injectors leak or injector seals leak?

I fear you may have jumped several steps at once here. It is likely that a failed or faulty coolant temperature sensor is causing your hot-start issue. As regards the fuel system, this will retain ...
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2 votes

Is it bad to continuously turn cruise control on and off?

I have VW Golf, which technologically should be similar to Audi, and I observe the same behavior you describe. I think the reason to keep the fuel on is that ECU can keep the speed constant in more ...
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2 votes

How to determine component causing overheating?

A test you can do is to measure the heat from several places: Both upper/lower radiator hoses Both inlet/outlet heater hoses. I'm thinking you may have either a clogged radiator or a bad ...
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2 votes

Why is my car hard to start only after a few hours?

Pull all your spark plugs, careful not to mix them up in reference to which cylinder they were IN. Are ALL of them as BAD as That one you show us here? IF that plug is the darkest, IS IT FROM THE ...
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2 votes

Why is my car hard to start only after a few hours?

Fuel Rail Pressure was around 6 bar when off (25 bar when on, 70+ bar at WOT), it remained this even after 2 hours (I'm guessing it primes when you turn on the ignition) I believe this is the root of ...
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1 vote

Why is my car hard to start only after a few hours?

NGK is backwards with heat range, meaning the lower the numeric digit is, the hotter the NGK plug is. This is unlike every other spark plug where you get colder in heat range when the number is lower. ...
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1 vote

Ticking noise which gets faster at idle and slows after blipping

From what you posted in your question, this would seem to me to be something in the HVAC system which is vacuum operated (taking a stab at this). Since it is not dependent upon engine speed for the ...
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