the 05 Gator in my book, shows it coming with the 4R100 with the 5.4 SOHC. Hmmm. Pan is 20 bolts in the picture.

 

Alright my F150 kin, I just got the PO455 "gross evap system leak" code on the truck. Any of you have that one yet? Last time I specifically got the evap purge solenoid.... that was probably 2 years ago. I cleared the purge solenoid code, and now this one.

The fuel cap is fairly new.... replaced in August of 2017 (Motorcraft).

 

Could the vent filler hose have dry rotted or gotten a hole in it? I'd doubt the filler hose would have a hole or you'd notice leaking fuel while filling up and/or a stronger fuel smell.

 

Yeah... don't think the filler hose leaks, because I filled it up right after the CEL came on. No leaking.

I do get a whiff of gas once in a while when I shut it off though. Might be the vent hose. ****.... shouldn't have filled it up, LOL.

 

P0455 I think is a vent problem. Either the purge or vent valve. It could be the cap, but I'd check the valve under the truck Either the hose or vent could be sucking air which would throw this particular code. The purge under the hood on the firewall could also be the malfunctioning item.

 

By "valve under the truck", do you mean the purge solenoid? IIRC, that's by the spare tire?

 

No. I mean the one on the top of the tank where the return hose runs to.

If you are smelling gas, I'd lean to the firewall valve or the purge can. Still could be the hose though. That's my choices on this code.

 

Thank you my friend. Thinking about this...I tend to smell it more often near the filler, usually when it's hot outside.

I took it to SLC to pick up my metal order today. I've got 25 sheets of metal sitting in the bed, all the way to the end of the tailgate (8 feet long). Just heard on the news we might get a snow storm tomorrow.... perfect time to not be able to drive the truck, huh?

I just ran out and disconnected my hoses and put my hose bib covers back on. As much as I b!tc4 about the guy that lived here before me, I am sure glad he put a drain for the sprinkler system in the house, lol. Makes it very easy to get ready for winter. I can do it all downstairs.

 

From what I understand it's a problem between the fuel tank pressure transducer and the vacuum modulator valve that happens after filling the tank if it's not the cap. Since you've mentioned the snow coming I wonder if this isn't happening because of the weather? Was it cold when you filled your tank? Gasoline is denser in the cold which could be effecting this. IIRC this is one of those codes that will clear itself after so many starts of the engine if the cause of the code has been cleared. I also believe it's an adaptive strategy code that will learn the weather change if that is the cause.

 

White, Came across this:

Running these EVAP monitors are accomplished two different ways. Ford, GM, and some Asian imports use vacuum to run the monitor, while Chrysler, most European and a few Asian products use pressure to run the monitors. There are a lot of factors that have to be correct in order for the PCM to carry out the EVAP monitor. The ambient air temperature needs to be between 40 and 100 degrees (for most vehicles) and the fuel level needs to be near a half of a tank full. (The air temperature in the tank will effect the fuel vapors.) The barometric pressure must fall between 22 in. Hg on Fords and 19 in. Hg on most GM vehicles. (8,000 to 10,000 feet above see level). Most of the systems are set up to only run the test with the vehicle under 35 mph so that tank slosh is to a minimum. The last but most important thing is there cannot be any other fault codes stored in the PCM. Since the job of the EVAP system is to reduce emissions it stands to reason if there are any emission related codes stored in the PCM the eventual outcome of the EVAP test would be inaccurate.

The altitude of SLC is already listed at 4,210-9,410 feet above sea level.　

http://www.hyvac.com/tech_support/at...essure%202.htm