Problems after overheat

mardimacfly
Thu, 13 Mar 2014 03:40:55 +0000
Maintenance/Repairs

New owner of a 1978 Chevrolet g30 350 5.7l with an edelbrock carb. Idles rough in all gears including park and neutral when cold. After it warms up it will idle fine in park and neutral but not in reverse or drive. Acceleration is fine. All this happened after an overheat (temp light never came on). No signs of oil/coolant mixing. No moisture in tail pipe.
Checked spark plugs they all look good. Checked under distributor cap, all dry.
Furthermore, temp light does not come on when key is in on position. I grounded the wire and the light comes on. Changed coolant temp sending unit and still the light doesn’t come on.
There is no pcv valve and the evaporative emission control canister is completely disconected. Is it safe to drive Lucky Number Two (that’s the van’s name, long story)?

11 posts - 7 participants