Spark plug question on engine that was over fuelling
10-12-2015, 10:18 PM
#1
Rennlist Member
Thread Starter
Spark plug question on engine that was over fuelling
So I got my S4 running after the fire. When I started running it again for the first time there was a broken electrical circuit on the temp2. It over fuelled like crazy and I worked out the problem. After that the car wouldn't start, so I pulled the plugs and as expected they were plastered in black soot. I wire brushed them clean and got it to start and the engine cleared itself out.
On my initial drive around the block a couple times I found it was hesitating a bit, and down on power when I tried accelerating more briskly. Has anyone else had this after a flooded engine, and would it be best to just replace the plugs or will some miles improve things?
On my initial drive around the block a couple times I found it was hesitating a bit, and down on power when I tried accelerating more briskly. Has anyone else had this after a flooded engine, and would it be best to just replace the plugs or will some miles improve things?
10-13-2015, 05:25 AM
#2
Rennlist Member
Once the plugs start firing they should clear quickly. If they do not then I would think some other problem may be lurking in there.
Remember, your motor has been through quite some trauma and there just may be some other not too obvious issue not yet spotted/rectified.
Rgds
Fred
Remember, your motor has been through quite some trauma and there just may be some other not too obvious issue not yet spotted/rectified.
Rgds
Fred
10-13-2015, 08:17 AM
#3
Rennlist Member
One problem with wire brushing is that it leaves behind metallic deposits that contaminate the cleaned surface (a problem when you weld aluminum). I would go ahead and replace the plugs.
10-13-2015, 11:00 AM
#6
Captain Obvious
Super User
Super User
They should clear up on their own. Plugs don't get damaged to the point of needing replacement from a simple flooding. It's only raw fuel that burn off quickly when the cylinder starts to fire again. Maybe pull them and clean them with some brake cleaner. Instill think something else is causing this problem.
10-13-2015, 11:14 AM
#7
Rennlist Member
Thread Starter
Well I have discovered the flappy isn't opening, my fitting at the brake booster isn't holding vacuum so I am sure that doesn't help. Will fix that and see. Overall it starts right up, idling nice and smooth and responds nice when not under load. The isv on two occasions has bumped the idle up to 1800 rpm for 20 seconds then it settled back down not sure what that is about.
I am sure new plugs won't hurt might as well take them out of the equation considering how cheap they are.
I am sure new plugs won't hurt might as well take them out of the equation considering how cheap they are.
