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Old 04-22-2019, 09:07 PM   #1
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Default Gas leak and hiss when running

So my 87 truck sat for a couple months. When I started it and drove it I had a heavy gas smell. After parked while still running I noticed a lot of fluid dripping and low and behold it was gas. I could hear hissing but couldnít see where the leak was coming from, seemed like somewhere behind the cab but was dripping off the frame. When itís off there is no gas leak. Maybe in the line?

Also when I went to park it it was spitting out a lot of fluid from the exhaust and white smoke/condensation. It didnít seem like a head gasket leak as it dissipated pretty quickly. Iím hoping it was just excess gas in the exhaust.

Any tips on how I should approach this?

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Old Yesterday, 12:56 AM   #2
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turn the truck on but leave the engine off. the pump in the tank will run and you should see the leak. start with looking at all the rubber lines to and from the tank. age has probably caused the hoses to crack.
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Old Yesterday, 08:04 PM   #3
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If you can get it on a lift, it will help find the leak.
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Old Today, 08:03 PM   #4
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Hey had the same problem awhile back, on the pump there are two nipples that curve off the the top of the gas tank, they seem to rust pretty easy and crack. I'd check that before anything else because it's the hardest thing to get to, after that it's pretty easy to get to the rest
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