londonsate

I had CEL due to random misfire, tried seafoam, no change.

I use EVAP hose, if any one want to do it, I can take a picture.

My next step will do intake manifold valve clean.

Q7V8

Yes, if you can post pics of the evac hose, I was planning to seafoam my engine. Since now, I only used directly on the gas tank. Thanks.

londonsate

Here is the pic, just open one end of that hose, I opened the end closing to the black plastic sensor.

dukesean

My '07 (112,000miles) has CEL for random misfire and b1 s1 o2 sensor about 1 month, and rough idle when start sometimes.
I used the same hose to do seafoam, I used about 1/3 can of seafoam the first time. VCDS to clean all the codes.

CEL came back about 6 days later. Then I did the second treament with whole can of seafoam two day in a row, since we are traveling now so don't have time and place to diy manifold clean.

So far, after around 1000 miles, everything seems fine. No more CEL.

Plan to do manifold clean when at home. So please let us know the 'how to' when you done. Thanks.

londonsate

Take as many pics as I can

dukesean

Cool, sounds great.

Prospeeder

Wonder if you could do this as preventative ever year or something to keep the carbon to a acceptable level not to cause issues.

londonsate

Do u mean if I do seafoam every year it will prevent the carbon built up?

tlasher69

let me know how it works , my exhaust flap is stuck to the open position , we got a bad tank of gas . used another gas treatment the light went off and came back on the next day . do you think I can use sea foam gas treatment ?

not2fast

Did you use the spray for this?