mr1985.0

My buddy just bought an 83 5.0 with an 86 motor it has some make shift **** under the carb.I think its some type of home made egr block off, and if so could it cause i to smoke or have a slight miss?

iceman89gt

i wasnt aware that any carbed motor had a egr valve, what color is the smoke and whats it smell like

mr1985.0

Its white greyish

Blckstng93

I believe CFI has an EGR.

iceman89gt

white grayish color sounds like a possible leaking head gasket, but it could also be from a slightly rich fuel mixture. usually the lighter smoke comes from coolant entering the cylinder and being burned with the fuel and then exiting through the exhaust via the exhaust valve, oil passing by the rings and entering the cylinder will do this also. when you rev it up does it pop any through the exhaust or have any poping through the exhaust during deceleration?

mr1985.0

it comes out through the exhaust at start up none at idle but it does it wide open throttle

mr1985.0

I thought of head gaskets too but no peanut butter in oil or radiator, and temp gauge reading normal.