1988 F250 460 EFI
 

I bought this truck, as my husband reminds me often, clutch was bad, so he changed that, rear fuel tank would not work, so he changed the in tank fuel pump, (please bear with me, this has been a two month project), then front tank would not work, so he changed front in tank fuel pump, also changed plugs, wires, distributor cap and rotor, and leaking rear main seal. Now, to the problem, the truck smokes constantly, a whitish smoke that smells terrible! We have replaced the EGR, EVR, MAP, TPS, HEGO, ACT, etc., still smoking. Tried a Seafoam treatment, smoking just got worse. Checked head gaskets, cooling system, emission system, TFI or ICM, whatever it's called, and we are not pulling any codes from EEC. Any thoughts would be greatly appreciated! Oh yes, also did vacuum and fuel pressure checks, and all checked out. Thanks.

RE: 1988 F250 460 EFI
 

The whiteish smoke ordinarilly means water ,does it get worse after it warms up,it could be a cracked head, head gasket ,or block, the in take gasket could be leaking between water jacket and intake port.