Originally Posted by pappasteve
I believe it is fixed. It wasn't the lines it was the fuel tank pressure sensor. It was only reading zero all the time. Swapped it out and now it reads 7.5 and as vacuum builds in the system it droppes down towards zero.
Not sure why it didn't throw a code for a bad fuel tank pressure sensor, unless zero is withing the acceptable range.
My mom'* driving it to see if a code comes back. I don't think it will.
How did you test the FTPS? My daughters car has all the same issues you had with your moms car.
My daughters car is a 2003 Chevy Cavalier with 91,000 miles. A few weeks ago the check engine light came on with a code of P0440 (Small Evap Leak). Here is what I've done so far to try correcting it.
1. New OEM Gas cap
2. Replaced Canister vent solenoid at the rear and checked all wires for broken or damage.
3. Did a smoke test on it with a mechanic friend. Could NOT find any leaks at all.
4. Reset the check engine light 3 times now after doing each step to only have the light return on after 40 to 60 miles of driving in the car.
I'm really stumped and not sure what I should try next. Any help would be greatly appreciated!
Thank you and I look forward to correcting this problem. I hate being stumped!
What are my final options?
1. replace purge solenoid at front?
2. Could it be the engines PCM (Computer)?
3. Vapor Charcoal Canister?
4. Gas filler tube to the tank?
5. What about the Fuel Tank Pressure Sensor?
Like I said...there were NO visible leaks when we smoke tested it. We did this test numerous times!