Hilljack

I'm trying to fix my sisters blazer, 99 4.3 V6 auto. she says the CEL has been on for about a year and the mechanics that shes taken it to all say her catalytic converters are plugged. its also a california emissions vehicle. When I plugged my scanner into it, it comes back with a #5 misfire and thats the only code. I'm assuming that if the cats are plugged, it is because she drove it so long with the misfire. I'm not really sure where to start or what to check... not used to working on vehicles with spark plugs lol.

i am driving a toyota land cruiser for about 1 year (company vehicle), and as a joke want to put spinner hubcaps on it to irritate my boss. I can only buy things online as I am "removed from civilization" for a while. The only ones I can find are for 13"-15" rims. Does anyone know where I could find spinner hubcaps for a 16" rim online?

I have a 95 F-150, 4x4, manual tranny, 302. I want to swap in a 351. How difficult will this be? Will all the brackets (alternator, A/C, etc..) from the 302 fit the 351. Also since the 302 is EFI, am I going to have to change the computer? I know that the tranny will fit, but what about all the other parts? I am hoping to buy a rebuilt or reman 351 for this swap.

I have a '91 F-350 that I am converting to diesel, I want to use the Cummins 6B 5.9L designed for medium duty Ford trucks. I have a 460 and E4OD transmission. I will be buying a re-manufactured motor for the conversion so I have a few different configurations to choose from. But I am unsure as to what transmissions are available for this application.