Hey guys i know i put this on here before but got deleted.
i have a 08 mdx
168k miles
I keep getting the emissions light on with code of a large leak and a minor leak
I have changed the cap, purge valve, charcoal canister and filters between
i have gotten a smoke test with no results
(i did realize that the old canister sent some charcoal done the hoses all the way to the purge valve)

my gas mileage fluctuate alot.. for example i would have it read like 340 miles till empty and they all of a sudden bounce up to 400 then back down after a while

Any thought maybe someone had the same problem or anything i can do or get done to resolve my annoying issue

 

Are you the original owner?
Is your repair shop a shop that specializes in "Imported cars"?
Just like the benefits of asking questions on a dedicated MDX Forum, there are benefits from working with a dedicated Import repair shop.

 

I am the 2nd owner
And i took it to the dealership to get it checked out

 

could be a few things:

1. Bad Fuel tank pressure sensor (FTP) or bad o-ring on the sensor
2. broken wire between the system and the ECU causing the system to not function properly.
3. Crack/leak in fuel tank

The service manual states to put a vacuum system on the gas tank and monitor the fuel tank pressure sensor and see how the values change. If it doesn't bad FTP. If it does but not according to how the pressure is there may be a leak/crack somewhere.

 

 

Thanks for this brother.. im assuming the dealership did this cause i brought it in to take a look at this problem.. and i replaced that canister that also came with the sensor

 

Or maybe it didnt come with it, its been so long i dont remember but i have to definitely look into that

 

according to the diagram it looks like it is seperate from the entire canister assembly, part no 48 for the sensor, no 6 for the assembly:
https://www.acuraoemparts.com/v-2007...l--fuel-pipe-1

If you do buy anything from that site use code acurazine for 5% off.

 

Alright so i actually switch the sensor with my buds mdx.. been driving for a week now.. just got back the codes again while my buddy's car is perfectly fine. Im literally going to lose it man

 

time to check for damage to the tank