I haven't posted on here in some time but hello to all! For about the past two weeks I have been getting a stong gassy/exhaust smell comming from my car. I can't even drive with the ac on because it smells like a straight exhaust/gassy smell is comming through the vents! It's so bad that after driving I can't even park my car in the garage with the garage door closed because the smell is so strong. I don't have offroad pipes (I know what that smells like), only highflow cats. I have had my current exhaust set up for about six months with no problems (Highflow cats/prochamber/pypes mid muffler). What could be causing this strong gas smell to come out of no where?

 

Hey Adam!

I don't know, maybe a clogged cat converter?

 

Check your PCV system, maybe it's clogged? That gassy smell is exactly like what blowby smells like and the cabin air system intake is in the engine bay....

Actually, if you have a Paxton, do you have an oil-catchcan/seperator or breathers?

 

You should start with the obvious and make sure none of your gas lines, rails, and injectors are leaking. There's a dye you can add to the fuel system to help you pinpoint any leaks.

 

You state it's a gassy or exhaust like smell. Do you know what it is precisely? If it's the smell of raw fuel, then definitely start checking fuel lines, pcv hoses, etc. if it's an exhaust smell, you've probably got an exhaust leak at one of the mid-pipe connections to the manifolds.

If for instance you have an exhaust leak at the manifold on the passenger side, this could cause both issues.

The front oxygen sensor on the passenger side is located in the exhaust down pipes, and thus the leak would be in front of the sensor the car uses to measure air fuel ratios. Since a leak will introduce fresh air to the pipes before this sensor, the computer will read this as a lean condition and dump more fuel into that engine bank.

This of course will richen the fuel air mix when it doesn't need to be. You'll then likely have a raw fuel smell from the engine's probable inability to burn the additional fuel that is being given to it.

 

I would definently say its more of a raw fuel smell. When I pulled up to the mother in laws house today the first thing she said when comming to my passanger door was, "It smells like gas!", I was like uh oh lol. I'm gonna take it to a local shop to see exactly what the problem is.

 

I need to change my sig because I took the paxton off..

 

Whats up buddy!

 

Yeah, that's certainly not from blowby, ha!

Definitely second bigray's suggestion of checking the fuel system. Had a fuel relay valve stuck in the open position on my '90 TBird, you could smell gas inside and from 5 feet away outside.

 

We'll, whoever re installed my fuel rail and injectors didn't do a good job because I was leaking fuel out of the rail.. Oh we'll, it was a pretty simple fix and she runs perfect

 

Glad you got her fixed up Adaaam! How have you been? Great I hope!

 

Glad it was an easy fix! Those are always fun and satisfying ones.

 

Glad you found it. That's a scary mistake someone made.

 

I thought it said grassy smell so i figured I better click and see what its all about lol.... but you said gassy

 

I have been great Scoot!!! I hope the same for you!! Time to get back into the whole mod thing again!! The bug has bittn

 

Most definently!! It smelled as if my car were gonna blow at any minute

 

I had a scary feeling it was going to be something bigger but i'm glad it was a simple fix!!

 

LMAO!

 

To be honest I was gonna tell you to eat less pork 'n beans, but I didn't want to make light of the situation.

 

I try to leave my gas out of the mustang!