ok, so i read the tutorial on how to seafoam, and i did it correctly, so i took my car for a drive afterwards, and got a CEL, took out my handy dandy usb vagcom and scanned it came up with this

VAG-COM Version: Release 409.1-US


Chassis Type: 8D - Audi A4 B5
Scan: 01,02,03,08,15,17,25,35,45,55,56

-------------------------------------------------------------------------------
Address 01: Engine
Controller: 8D0 907 559 C
Component: 1.8L R4/5VT MOTR AT D03
Coding: 06251
Shop #: WSC 06335
7 Faults Found:
18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 35-10 - - - Intermittent
16684 - Shareware Version. To Decode all DTCs
P0300 - 35-10 - Please Register/Activate - Intermittent
16687 - Shareware Version. To Decode all DTCs
P0303 - 35-10 - Please Register/Activate - Intermittent
16688 - Cylinder 4 Misfire Detected
P0304 - 35-10 - - - Intermittent
16685 - Shareware Version. To Decode all DTCs
P0301 - 35-10 - Please Register/Activate - Intermittent
16684 - Shareware Version. To Decode all DTCs
P0300 - 35-10 - Please Register/Activate - Intermittent
16688 - Cylinder 4 Misfire Detected
P0304 - 35-10 - - - Intermittent
Readiness: 0000 0000

-------------------------------------------------------------------------------
Address 02: Auto Trans
Controller: 8D0 927 156 BN
Component: AG5 01V 1.8l5VT USA 8508
Coding: 00000
Shop #: WSC 00000
1 Fault Found:
00526 - Brake Light Switch-F
27-00 - Implausible Signal

-------------------------------------------------------------------------------
Address 03: ABS Brakes
Controller: 8E0 614 111 A
Component: ABS/EDS 5.3 QUATTRO D10
Coding: 0273004284
Shop #: BB 24334
No fault code found.

 

When your engine sucks up some seafoam, the plugs get a little soaked while also restricting 02 to the combustion process and so you misfired. You should change your plugs after seafoaming anyways.

 

ok, I'm in autozone now getting plugs, I came here to get my car scanned, their scanner came up cylinder 1 3 4 misfired that's it

 

ok back home, i posted previous message from my iphone while i was at autozone, i was showing the guy the codes i got compared to the codes their scanner got. they got

P0301
Misfire on Cylinder 1


P0303
Misfire on Cylinder 3


P0304
Misfire on Cylinder 4

Possible Causes
1: Ignition system fault-spark plug(s). ignition wires, coil
2: Vacuum leak (im going to clamp my hoses after posting this)
3: Injector Fault
4: High or low fuel pressure





ok and also how do i clear my CEL they told me they couldn't clear it for me.

 

ok... the plugs the guy at autozone sold me need to be gapped, whats the right gap and how do i set the gap, i have one of them tools to check gaps but i never set a gap before

 

ok awesome, just finished replacing plugs, bought a new gapper tool and set gaps to .030, after i put the last coilpack on i started my car and woot! no CEL. looks like that fixed it, and man my old plugs were oily

 

Then you probably ought to replace your well gaskets and VC gasket.

 

Way to go. Hopefuly your plugs do not actually have engine oil on them, but just soaked with seafoam/soot/carbon from the cleaning. If you had engine oil on top of the plugs your valve cover gasket needs replaced. If there was engine oil on the bottom/spark part of your plugs then you need new piston rings. Now I'm just making your paranoid

 

right.... *looks in wallet*.... will 2$ be enough?

 

Well it's pretty likely that all B5's by this point would need a new VC gasket anyways. My 00 was leaking at 75k miles, and the one on my 97 w/170k I don't think was ever replaced