Fuel Smell at Cold Starts - Page 2 - Toyota 4Runner Forum

gamefreakgc · 10-14-2022, 04:30 PM

I can say that fuel smell in the cabin is not normal. Fuel smell with the windows down, going in reverse and huffing your own exhaust, yeah I could see that. Not with the windows closed though.

A good tune-up can go a long way as well. In a related issue, I was getting fuel smell in my Altima when it idled and got so bad it made my eyes water. Replaced the air filter, cleaned the MAF sensor and tightened down some questionable hoses and the smell and fuel in the interior is gone. I think there was a vacuum leak or faulty MAF signal that was pouring on the fuel at idle to compensate. Might be worth doing the same, especially cleaning the MAF sensor as that is a known issue.

McLoven1t562 · 10-14-2022, 07:41 PM

Quote:

Originally Posted by gamefreakgc

I can say that fuel smell in the cabin is not normal. Fuel smell with the windows down, going in reverse and huffing your own exhaust, yeah I could see that. Not with the windows closed though.

A good tune-up can go a long way as well. In a related issue, I was getting fuel smell in my Altima when it idled and got so bad it made my eyes water. Replaced the air filter, cleaned the MAF sensor and tightened down some questionable hoses and the smell and fuel in the interior is gone. I think there was a vacuum leak or faulty MAF signal that was pouring on the fuel at idle to compensate. Might be worth doing the same, especially cleaning the MAF sensor as that is a known issue.

lol right? I definitely know it's not normal :P - so I just replaced my O2 Sensors since I have no idea how old they were, the sensors were pretty dark so looks like it was time anyways. Swapped the fuel filter because I had a new one just sitting around, going to clean the MAF Sensor this weekend and then see what hoses I can get and swap those out as well. I've swapped a few hoses that connect to my new oem evap canister but the NAPA didn't have all the sizes I needed at the time.

I'm just going through maintenance stuff overall, whether it's fuel or not. Luckily with my 3 inch lift I don't need jacks for most undercarriage things either lol

hawkcharmer · 10-14-2022, 11:47 PM

Quote:

Originally Posted by GRIPGRAIN

I had LARGE evap leaks with no codes present.

How did you resolve the EVAP leaks? I have no codes, but getting fumes as well

CougarHound · 10-17-2022, 10:28 PM

Sounds normal to me. OBD checks for leaks and throw codes if there is anything wrong with the emissions system. Maybe clean the mass air flow sensor or oxygen sensors? Prob running too rich for some reason.

Also maybe you bought a crappy charcoal canister? Or the charcoal canister is getting over saturated somehow? Do you top off your fuel?

GRIPGRAIN · 10-29-2022, 11:56 AM

Quote:

Originally Posted by hawkcharmer

How did you resolve the EVAP leaks? I have no codes, but getting fumes as well

replaced the cracked hoses

giovannie23 · 10-29-2022, 02:06 PM

I also had a gas leak that i would smell only on cold starts. I started looking around and noticed gas slowly dripping down the back of the engine. I had a o ring on the injectors go bad.

I think it was leaking the whole time i would be driving, but with the engine hot it would evaporate before it would give off a smell.

I also had no cel codes pop up

Site Navigation