Hard Start hot (after short stop)

[ColdCase]

I tried search but didn't find anything useful, but that could just be me.

Daughter mentioned today that every time she stops for fuel or to pick up a convenience store item, her A4 won't start the first time. Takes a few tries. If it sets for like 15 or more minutes, it starts fine.

Is this a common thing that I just can't find?

Where do I start?

The 2008 2.0T has a little over 100,000 miles with a recent timing belt change. She probably has a thermostat or sensor problem as she often gets that check engine light for low coolant temp thing.

Thanks

[JesusB7a4]

If it won't start after refueling then you should replace the n80 valve. If you're having cooling problems you should replace thermostat and sensor

[HereInOhio]

Take my comment witha grain of salt because I am rather unfamiliar with the B7 audis but I know the 06 and 07's had a problem with an inferior fuel pump module. Its under the back seat by/on the low pressure fuel pump lid. When they got hot they didnt work. Probably not your issue but I wanted to mention it. There may even be a recall or tsb about it.

If you have vcds I think it usually throws a code 3089 iirc.

[RickB_7]

Could also be a fuel pump relay. If you don't hear a humming noise when the door is opened or the key is turned to on, but not turned all the way to start, then the fuel pump isn't priming.

Edit: Reading into this a little more could also be the low pressure fuel pump located in the gas tank.

[miA4]

My car would do this on occasion and it ended up being the cam position sensor..... Changed it and all is well again.. no issues. Never threw a CEL either.

[Denio24]

First things first scan for codes using vcds. Usually a cel wont light up if it is intermittent. A failing fuel pump control module can affect starting and drivability. Also, you may hear some whining coming from the rear near the seat bench. You most likely have p3089.

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[ColdCase]

Thanks guys.

I finally had a chance to look at this more closely as there is now an active check engine set. The code this time is not the temperature thing. Its a P0455 code, EVAP gross leak/ no flow, suggest replacing the EVAP sol valve (n80).

I want to double check if a hose disconnected as the timing belt was recently replaced. Otherwise it doesn't seem like anyone stocks these locally besides the Audi dealer, currently at $40.

[ColdCase]

As a follow up, I swapped the EVAP valve (n80) and all is well. I used a dremel to cut off the old clamps and the seal pick tool technique to easily break the hoses loose... Now the daughter mentions the car is loud in second gear. I took a look and found the two exhaust pipe band clamp rings rusted off (the clamp in the center, the rings and bolts are not stainless I guess). Doesn't seem to be a replacement stocked locally and the OEM band part seems in good shape, just nothing to hold it in place. So I wrapped a generic autozone 2 1/4 inch band clamp around the existing clamp for the time being. It seems to be holding OK. I looked up the DIY test pipe instructions to get an idea of how things go together. A lift would have been nice, but I had enough room to work with the front up on ramps.

This forum has so many helpful members and information, thanks again.