I can smell gas in the cab of the windstar van but dont see any leeks but it built up presure when i opened the gas cap

Follow the fuel line to the engine. Look over the fuel rails and fuel connections looking for any cracks or breaks.

Good thing you passed before the engine light came on. You should mos def get the code from that engine light. If you smell gas you have a leak in the system. Same thing happened to me i had to drop the tank and change the seal around the lid of the fuel pump housing because the smell was coming from under the car and in the car. I also followed my fuel lines and saw some cracks forming so i replaced those and the gas cap for the heck of it. Only $20 for everything but make sure to pull the code first. It reslly makes things easier.

i had the same issue and it was actually my gas cap. For some reason if the gas cap wasn't sealed all the way, i would get a strong gas smell inside the vehicle. try that 1st

fuel pressure regulator ! $50.location/top right side engine.smells like gas in cab strong while parked with air /heat on . check this. mine started leeking gas after 60,000 miles. easy fix one star bolt/hose/gasket 15 minutes.

if you smell gas you may have a small gas leek someware

(ex: pinhole in the gsa tank, small home in the gas line)

dont test with water gas will pass threw a whole that water wont

i hope this helps

Start the car with the hood open. Check the engine compartment as well as the fuel line from the fuel tank to the engine compartment. If there is a leak you will find it. Remember gasoline will evaporate quickly when there is air movement so watch carefully to make sure you don't look over the leak.

burnt or unburnt gas? if burnt gas smell look for bad manifold or manifold to pipe (donut) gasket.
if unburnt smell look for gas line leaks

try new gas cap that is vented

hope2help shack

If there is white smoke coming out of tail pipe, the head gasket is blown. needs to be replaced.

MINE HAS THE SAME THING,IT IS NOT GOING TO HURT ANYTHING,MAKE SURE GAS CAP IS TIGHT,U CAN UNHOOK THE BATTERY FOR LIKE 2 MINUTES HOOK BACK UP AND THE LIGHT WILL GO OFF,RESET ITSELF,OR U MIGHT HAVE A VACCUM LEAK SOMEWHERE IN THE HOSE