'87 Olds Cutlass Supreme Gas Leak

hi.you elimanated all the firing problems i would say try the feul side it can be a dirty feul filter or a faulty injector it can be injector wires or air mass meter or a leak in the intake manifold I will say start with the feul filter.hope this helps

i need see the steps to changing a heater core in a 87 oldsmobile cutlass supreme

check for a vacum leak you can do this by spraying starting fluid around vacum hose just be carful don/t spay when engine is hot

what layout of power windows wiring diagram

fit a new tank or get some glue called "tank weld" its like a putty and will stop the leak dead in its tracks im gessing its rusted through?

check emissions egr valve, pcv ,vacuum leak, plugs ,wires, coil, throttle body clogging can be any thing

Factory recommended tire pressures are usually on the drivers door frame, check the decals for size and tire pressure.
a second site is on the inside of the gas cap cover.

Spend $12.00 on a new radiator cap. The Olds has a pressurized water system. If there is an air leak it will not cool properly. Be sure your radiator is filled and no water leaks exist such as leaky freeze plug or water hoses. Is the fan belt good and snug? You could also have a sticky thermostat. Both the cap and thermostat are low cost items that you can do yourself as a first step in eliminating the problem.

Yes, it will go right in.

sounds like you have a huge vacuum leak at the engine, check under the hood for a sucking noise, I think you will find one.