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carguyjosh, ASE Certified Technician
Category: Chevy
Satisfied Customers: 2172
Experience:  ASE certified , 16 yrs in field
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Have 01 Tahoe. Terrible gas smell-to the point my wife is nervous

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Have 01 Tahoe. Terrible gas smell-to the point my wife is nervous about leaving it garage

Have you seen any leaks from your truck?

Do you have a flashlight and the ability to get underneth it?


Thanks, Carguyjosh

Customer: replied 7 years ago.

Have not seen any leaks.


Yes to the next two questions.

Okay, what I would like to have you do is to get under the truck with a flashlight....Not a 110v. work light (gas fumes, burning bulb, bad combo )...


I need you to look at the fuel tank, lines, and filler neck...You are looking for any discoloration where it goes from clean metal to a dirty, possibly wet area...


Please let me know what you see and we'll go from there....


Thanks, Carguyjosh

Customer: replied 7 years ago.
No luck. A lot of rust, but no discoloration.
Customer: replied 7 years ago.
Don't know if this helps, but when I moved vehicle into garage to check it i did'nt notiv\ce smell. Was very strong today after being on highway.

Can you tell if the smell is more towards the front or rear of the truck?


The next thing that I would like to have you look at is the fuel injectors, fuel rail and the pressure regulator.


You will need to open the hood to get a look at these components. After looking at the injectors and fuel rail I will need you to pull the vacuum hose off of the regulator to see if its leaking.

The fuel pressure regulator is located on the driver's side about in the middle of the rail...


Please let me know what you find...


Thanks, Carguyjosh


Customer: replied 7 years ago.
The smell appears to be toward the front. No guatanty on me accomplishing your request, but I will try,
No problem, just let me know....Thanks, Carguyjosh
Customer: replied 7 years ago.
Saw no leaks, but am hesitant to remove vacuum hose as it seems anytime I try to do something to a vehicle or around the house bad things happen. Maybe we should settle up and I will go plan B. Have not figured out what plan b is yet. Thanks.

Well I hate to leave you unanswered, The most likely cause is that the fuel pressure regulator is failing and allowing raw fuel to be pushed into the vacuum hose and then into the intake.


A tell-tale sign is that sometimes the engine may crank longer than normal to start and may have excessive smoke out of the tail pipe.


Now, I don't know about where you are but at my shop, we wouldn't charge someone to run their vehicle up on a hoist to take a quick look around. Most good shops won't charge...


Please let me know what is found....


Thanks, Josh

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