I recently bought an Audi A4 2.8L from a used car lot. The documentation shows it only has one owner, but I didn't really notice whether the car was always running on premium fuel. It might be a possbility that it was running on high ethanol fuel b/c I had the O2 sensor changed before I took the car.

My question is, what kind of products on the market can I use to help clean out the engine b/c the build-up of deposits caused by high ethanol fuel?

I want the car to start fresh and even though it's an 9 year old car, I will still treat it like it's new.

 

I think Seafoam, try searching the forum for that.

 

ya seafoam would work

 

Yeah seafoam, I did a write up on how to in the DIY section. After seafoaming I would change the oil immediately. I would also use higher octane gas for the first 2 -3 tanks

 

Thanks very much for the post.

I checked out the DIY post, really helped alot thanks.

I just had my oil changed, so I assume my best bet would be to do it right before it needs changing again?

Also, I watched the video as well as the posts, so where can I buy the materials for this? Canadian Tire?

So far this is what I understand from the threads:

1. I turn on the engine.
2. Feed Seafoam through brake boaster vac hose (where can I find this hose and how do I detach it? Do I detach it before I turn the engine on or while it's running?)
3. Slowly feed it with a cup so that I don't hydro lock the system.
4. Once everything is sucked in, turn off the engine, and let it sit for 15 minutes.
5. Then try and turn the engine back on and I should see a lot of smoke coming out from the back.
6. Change oil and fliter asap.
7. And from then on, only fill up with premium fuel.

My car has 106km on it, so I plan to do this twice. Should I do it one after the other right away o r should I wait for the next following oil change?

Please don't mind me, but I'm new to this DIY stuff and this would technically be the first time I'm doing something like this by myself. I want to really make sure I know how to do it so that I don't damage anything else.

To me, this Audi is very precious, saved alot of money as an college student to be able to own one of these.

Thanks again.

 

Hey Nate.

I've found Seafoam at Auto Value, but no where else. Perhaps Princess Auto? I've been planning on doing this to my car for a while now, but trying to find a good time to do it. I've heard from other guys that have used it that there is quite a bit of smoke pouring out for about 5 minutes or so. I just didnt want to have the fire department called out to my place.

From what I know, you've got the procedure right. However, dont try to suck the whole cup into the system. When the engine starts to sputter (or it may stall) then you should be good to shut it off and let it sit. I dont know how much fluid it will take to make it do this though.

I've even heard of people putting Seafoam in their gas tanks to clean the injectors and in the oil as well to remove sludge buildup. I have heard arguments for both sides doing this, so maybe read up a little more before trying.

 

The engine will sputter the second you start injecting the seafoam! so no you should stall it and not shut it off!