P0456 Evap Small Leak - But not really?
#42
01-01-2011, 09:50 PM
#43
01-02-2011, 03:43 AM
Veteran Member
#44
01-02-2011, 08:33 AM
#45
01-02-2011, 08:44 AM
Veteran Member
#46
01-02-2011, 09:23 AM
#47
01-02-2011, 10:21 PM
#48
01-03-2011, 02:07 AM
Veteran Member
#50
01-03-2011, 08:38 PM
Pulled the canister
I pulled the Denso PA366 canister out of the assembly tonight.
Thought I might find it as a part alone, but no such luck.
In anycase, I will clean it thoroughly, determine what adhesives properly stick to it, inspect for cracks, and otherwise apply a bead of adhesive (epoxy?) around the body seam, and see if this fixes it - I did not listen for leaks before, as the car is kind of 'apart' right now.
It will be a while before I fix, and drive it enough to determine that this is resolved or not.
Pete
Thought I might find it as a part alone, but no such luck.
In anycase, I will clean it thoroughly, determine what adhesives properly stick to it, inspect for cracks, and otherwise apply a bead of adhesive (epoxy?) around the body seam, and see if this fixes it - I did not listen for leaks before, as the car is kind of 'apart' right now.
It will be a while before I fix, and drive it enough to determine that this is resolved or not.
Pete
#51
01-04-2011, 01:48 AM
Veteran Member
If you can't figure what needs fixing, read the fuel trims (and post them if you want help). Also check that both banks are running CL (closed loop).
#53
01-04-2011, 02:31 PM
Veteran Member
#55
01-04-2011, 02:39 PM
Senior Member
Where would it be located on my car? I've gone through the same stuff. Swapped out a couple of fuel caps, inspected the lines, done a sniff test. I can clear the fault and after about five or six start-ups it will come back. The only exception is if I go on a long trip. I went to Utah last month and the light never came on the whole week I was there. When I got back, it was good for a a couple of days but as soon as I started my usual home to work drive it came back. I've taken several trips that were 150+ miles each way, and the fault doesn't show till I'm back. I always clear the fault before I go on a trip. It's the stop and go stuff that brings on the light.
Any ideas folks?
Any ideas folks?
#57
01-04-2011, 03:30 PM
Veteran Member
#58
01-04-2011, 03:59 PM
Veteran Member
I also noticed that the original Poster is from California. I know at least in to the mid / late 90's vehicles had "California" Emissions, and at some point there were a couple states added to the list. I remember 95% of speed parts saying 49 State legal.
I wonder if this is no longer the case, or if California still has stricter standards than the rest of the country. We only have a once every 2 yr OBDII code scan, only for vehicles over 5 years old. If no codes are present, and all the monitors are set ready, you're on your way for another 2 yrs.
They still do tailpipe testing on OBD1 Vehicles (like my '90 500SL), but they are talking about exempting cars over 20 years old (currently the exemption is at 25 years of age), so they can slowly weed out the last of the OBD1 cars sooner.
George
I wonder if this is no longer the case, or if California still has stricter standards than the rest of the country. We only have a once every 2 yr OBDII code scan, only for vehicles over 5 years old. If no codes are present, and all the monitors are set ready, you're on your way for another 2 yrs.
They still do tailpipe testing on OBD1 Vehicles (like my '90 500SL), but they are talking about exempting cars over 20 years old (currently the exemption is at 25 years of age), so they can slowly weed out the last of the OBD1 cars sooner.
George
#59
01-04-2011, 06:19 PM
Veteran Member
I think Brutal had a take on this code - have a look back. If you want (or need) to fix it, it won't necessarily be easy but also may require changing parts till you happen on the right one.
I'd think it may not set on higher speed driving for the obvious reason (small leak matters more when hardly using gas).
I'd think it may not set on higher speed driving for the obvious reason (small leak matters more when hardly using gas).
#60
01-04-2011, 09:24 PM
Senior Member
First is has nothing to do with competance. Ive smoke tested many a jags over the years and the only thing youll ever see on a smoke test is a large or gross leak. Small or very small leaks youll never see. And theyre never a gas cap. Gas cap are normally large and gross leaks. If i have someone that really wants to go after a small leak i tell them up front its gonna be a parts replacement mulitple visit issue. I start with the cheapest and what has shown to be the issue moreoften than not. Thats the fuel tank seals under the rear seat both sides. Theyre either round or flat depending on year and model. Then the cannister close valve, and then the purge valve. I have a 05 stype sitting in the back lot that needs a complete fuel tank since i found the leak on that 1 in the very top under the trans/propshaft tunnel. Thats not a serviceable part of the tank and its been here 3 months cause jaguar doesnt have a vender to make one yet. ....so my recommendation is quit spending money on the smoke test and code clearing at this point. Put tank seal in both side and lube well. Be prepared to move onto the next item without fuss if/when the light comes back on