hardcore55

Pulled plugs don't look right???? Please help

hardcore55

All same plug black on one side white on other

hardcore55

Please anyone that can help I need it and motor misses a little when u stomp gas it idles OK

hardcore55

Probably help if I told u what they came out of a fresh rebuilt 94 383 lt1 z28 Afr heads comp 306 cam done changed optispark??? And wires

Purple Poncho

iTrader: (1)

Not that it is going to solve your problem bug you are using the wrong plugs. aFR and other aftermarket heads require a .75 reach gasketed plug and not a tapered plug as you have now.

96capricemgr

iTrader: (1)

I wouldn't use a platinum or iridium plug in an application like this either, they are for near stock.

VoyagerCamaro

I agree. I have a ez-go golf cart that when I pull the plugs they look like this. I've never had any problems with it though. IIRC AFR recommends the Delco 41-629 plugs for AFR195 heads... Plugs that are interchangeable with the delco plug are, autolite 3923, and accel 0416S, however the accel version from what I've heard is a horrible plug.

hardcore55

Thanks for tha help I need it I'm gonna try to change all plugs tomorrow and get NGK gasket seated plugs part#FR5. Stock#7373 keep comments coming need all tha help I can get LoL !!!!!

hardcore55

Keep comments coming need all tha help I can get I will keep y'all updated I the NGK gasket seated plugs work

blk97z28

iTrader: (3)

What plugs do you guys use then? Been using the iridium plugs on my full bolt-on car. Bump for the op, looks like the plug need more clearance.

TravisMcGill2000

iTrader: (2)

How much compression does it have?

JC316

iTrader: (1)

It's called splash fouling and I've seen it before on a vortec 350. Not sure how the hell it would happen on a fresh rebuild, unless some carbon was left in there.

hardcore55

Running 11.1 compression how do u stop splash fouling????

hardcore55

What causes splash fouling and what's the fix?????

JC316

iTrader: (1)

Splash fouling usually occurs on an extremely dirty engine. Carbon deposits come off from the piston and splash up on the plug. That's why I said it's odd to happen on a fresh engine, unless the pistons and combustion chamber weren't cleaned properly.

hardcore55

U don't think it could be valve seal leaking??? I thought of that but then again if that was it wouldn't the hole plug be black??? I rebuilt bottom end and had heads pressure tested and milled use same valves they still good maybe heads had carbon on valves ????I cleaned heads best I could ????but block was washed hottank and pistons was spotless ??? May be some old gunk left in Afr heads