when the car is hot?

[shoisfast]

Hi
when the car is warm sometimes it will not start until I relieve the pressure in the gas tank by removing the cap .is there another way to stop this from happening such as replacing the cap?

 

[SHOZ123]

Sounds like either the vent on the tank to the vapor recovery system, the vapor line going from tank to the canister or the canister is plugged.

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EEC-IV Evaporative Emission System


Fuel Tank Venting

Fuel vapors trapped in the sealed fuel tank are vented through the orificed vapor valve assembly in the top of the tank. The vapors leave the valve assembly through a single vapor line and continue to the carbon canister (located in the engine compartment or along the frame rail) for storage until they are purged to the engine for burning.


Canister Purging

Purging the carbon canister removes the fuel vapor stored in the carbon canister. With an EEC-IV controlled EVAP system, the flow of vapors from the canister to the engine is controlled by a purge solenoid CANP or vacuum controlled purge valve. Purging occurs when the engine is at operating temperature and off idle.

 

[Bizzy]

Hi
when the car is warm sometimes it will not start until I relieve the pressure in the gas tank by removing the cap .is there another way to stop this from happening such as replacing the cap?

Replacing the cap is a quick and cheap option to try before you get in depth with other things to check. Give it a try.

 

[projectSHO89]

Is it a problem of vacuum in the tank or pressure?

If the tank is in vacuum, replace the cap.

If it is pressurized, service the vapor recovery system.

Steve

 

[shoisfast]

bad fuel pump made it to san fran without a hitch