1987 pontiac fiero not burning gas?

[CaMeRoN_15]

the car ran fine than sat for like 4 months with a half tank of gas and now it wont start with the gas from the tank its squirting gas into the Throttle Body but not burning it if i pour fresh gas from a can into the TB is fires and runs untill the gas is burnt is this bad gas in the tank?

 

[wde3477]

Suggest fresh gas would be a good place to start since it will light off on good gas and you see the old gas entering the throttle body.

It's never good on a vehicle to just park it, but suggest if one does - it's best to park it with a full tank and perhaps a bottle or two of fuel-dryer, like HEET, to absorb any moisture.

Suspect that condensation has pooled at the bottom of the tank, and this water/gas mix is what is currently being pumped into the throttle body.

 

[Oreif]

Since it runs with gas poured into it, It could be a few things and most likely it's only the fuel related sections. Water in the gas. Some HEET or some Sta-bil will help. Try adding some then add in a gallon or 2 of fresh gas.

It could also be that the fuel system has a problem like low pressure or a clogged/dirty injector. While the injector may be spraying, It may not be spraying enough. Low pressure could be due to a weak fuel pump or dirty fuel filter. You could try spraying some throttle body cleaner into the throttle body to clean it and the injector.