1995 Chevy Suburban Fuel Smell

Tiny
SUBURBAN DUDE
  • MEMBER
  • 1995 CHEVROLET SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 159,000 MILES
Recently bought used Suburban. However when I filled up the fuel tank for the first time I noticed a fuel smell coming from engine compartment when I started driving that wasn't there before. I also found out I am missing the fuel tank fill cap. I have heard that without a fuel tank cap the fuel tank is not pressurized correctly. Is that true? Or should I start troubleshooting elsewhere? THANKS!
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Monday, June 21st, 2010 AT 6:27 AM

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Tiny
INTERNETMECHANIC
  • MEMBER
It's best to have a gas cap. Look for gas leaks, engine compartment, everywhere. You can check evap hoses, lines. Use a fuel pressure gage, cycle the key to build pressure, turn off, maybe you can find a good place to clamp return line without causing any damage. To See if pressure holds, you need to clamp both the return and supply lines. I have heard of some hoses having a hard plastic insert in them, so you have to be careful about clamping.
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Monday, June 21st, 2010 AT 9:11 AM

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