-
Who is stealing my gas ?
2007 Toyota Tacoma w/ 2.7 engine.
I always fill the gas tank before I leave the truck sitting. Which happens a couple of times per year. Left it this past April and when I got back in July the gauge said about 1/4. So on my way out I mindlessly stopped to fill the tank. Then, checked MPG and found it was 4.3. There was 56 miles on the trip-set. I mindlessly went 'huh?' and just reset the trip-set to zero. After a couple days of thought I concluded that someone must had stolen the gas while the truck was just sitting here. So I installed a locking gas cap.
Parked it July 1 with a full tank and left it. Now; August 10, the gauge shows 3/8. The locking gas cap is still in place and appears unmolested. So probably nobody stole either tank.
Question: what other possible answer is there?
Truck never smells like gas, is stored in the shade, nothing that I can see about the fuel system appears damp.
Where can 15 gallons of gas go in a month or two of just sitting?
I remember finding old cars - with fully vented tanks - that had been sitting for Years and still had gas in the tank.
I mused this morning that maybe something about the vapor recovery system may have failed - so I got Auto Zone to check the codes. Neither of which have anything to do with the fuel system.
Any ideas?
PHM
--------
When faced with the choice between changing one's mind, and proving that there is no need to do so, most tend to get busy on the proof.
-
-
someones getting into the tank somehow ....
Tell your Cat I said "Psst Psst Psst"
It seems like everywhere I go the AC is broken
-
Post Likes - 1 Likes, 0 Dislikes
-
Sounds like someone must have stolen it. I can't see any other explanation. They must be fairly good at opening locks.
"Is this before or after you fired the parts cannon at it?" - senior tech
I'm tired of these mediocre "semi flammable" refrigerants. If we're going to do it let's do it right.
Unless we change direction we are likely to end up where we are going.
"It's not new, it's better than new!" Maru.
-
I cant imagine a gas cap having a sophisticated lock mechanism
Its probly 1 key that fits all of them lol
Tell your Cat I said "Psst Psst Psst"
It seems like everywhere I go the AC is broken
-
Post Likes - 2 Likes, 0 Dislikes
-
Originally Posted by
Snapperhead
I cant imagine a gas cap having a sophisticated lock mechanism
Most of those kind of locks are generic.
My parents bought a 1990s school bus and installed a new locking tool box under it and the keys were identical. I think they also fit some other locks they had but I don't remember what. Basically you can buy a few keys online and open most cheap locks.
"Is this before or after you fired the parts cannon at it?" - senior tech
I'm tired of these mediocre "semi flammable" refrigerants. If we're going to do it let's do it right.
Unless we change direction we are likely to end up where we are going.
"It's not new, it's better than new!" Maru.
-
Crs?
Take pics, write it down, mark the tires
.
Used to put a drop of custom nail polish on safety adjustment screws after calibration to indicate tampering or tape on a door.
-
Post Likes - 3 Likes, 0 Dislikes
-
Did you verify the gauge or the sender itself is not faulty. When you refilled did the refilled amount match what you expected based on the gauge readings?
-
Post Likes - 1 Likes, 0 Dislikes
-
Have you tried filling it a second time to confirm it will actually take anymore fuel?
Might be a sticking fuel sender. Not sure how Toyota units are designed but my Ford truck recently was sticking. Apparently a semi common problem with them.
Sent from my SM-G965W using Tapatalk
-
This truck always gets about 15 mpg. So the 4 mpg caught my eye. <g> But casually assuming I had screwed up somehow, the guy filled the gas tank, gauge said full, and off I went. And subsequent fill-ups showed about 15 mpg.
But after rolling all the likely possibilities around in my head for a day or two I installed the locking gas cap.
Then eventually I filled the tank to leave and rushed off to the airport. Got back here late Friday, started the truck Saturday, and found the gauge near 1/4 again with 13 miles showing on the trip set. <g>
WTF? Over?
PHM
------
Originally Posted by
szw21
Did you verify the gauge or the sender itself is not faulty. When you refilled did the refilled amount match what you expected based on the gauge readings?
PHM
--------
When faced with the choice between changing one's mind, and proving that there is no need to do so, most tend to get busy on the proof.
-
Post Likes - 1 Likes, 0 Dislikes
-
My original assumption was something like that: "Huh. Damifino. Fill him up - I've got stuff to do."
But the second time (now) I know it's not me. <g>
Nobody is driving the truck. For one thing I always disconnect the battery when I leave. So, although my keys are always here, anyone taking them would find the truck dead. I unbolt the clamp and leave the wrench on top of the battery for when I get back - nobody here is going through all that trouble. Plus; the trip-set miles would match the gas they used. Nobody is THAT clever. <g>
I did consider putting a dot of hot-glue holding the filler door shut. Then if it is still intact in September - the gas isn't coming out through the fill pipe. <g>
PHM
-------
Originally Posted by
ehsx
Crs?
Take pics, write it down, mark the tires….
Used to put a drop of custom nail polish on safety adjustment screws after calibration to indicate tampering or tape on a door.
PHM
--------
When faced with the choice between changing one's mind, and proving that there is no need to do so, most tend to get busy on the proof.
-
Post Likes - 1 Likes, 1 Dislikes
Galt disliked this post.
-
Originally Posted by
Poodle Head Mikey
My original assumption was something like that: "Huh. Damifino. Fill him up - I've got stuff to do."
But the second time (now) I know it's not me. <g>
Nobody is driving the truck. For one thing I always disconnect the battery when I leave. So, although my keys are always here, anyone taking them would find the truck dead. I unbolt the clamp and leave the wrench on top of the battery for when I get back - nobody here is going through all that trouble. Plus; the trip-set miles would match the gas they used. Nobody is THAT clever. <g>
I did consider putting a dot of hot-glue holding the filler door shut. Then if it is still intact in September - the gas isn't coming out through the fill pipe. <g>
PHM
-------
I like the hot glue idea.
"Is this before or after you fired the parts cannon at it?" - senior tech
I'm tired of these mediocre "semi flammable" refrigerants. If we're going to do it let's do it right.
Unless we change direction we are likely to end up where we are going.
"It's not new, it's better than new!" Maru.
-
I considered that but it would interfere with my 'let's leave it and see if any more disappears' idea. <g>
PHM
-------
Originally Posted by
BALloyd
Have you tried filling it a second time to confirm it will actually take anymore fuel?
Might be a sticking fuel sender. Not sure how Toyota units are designed but my Ford truck recently was sticking. Apparently a semi common problem with them.
Sent from my SM-G965W using Tapatalk
PHM
--------
When faced with the choice between changing one's mind, and proving that there is no need to do so, most tend to get busy on the proof.
-
You have a leak somewhere. You need to observe it for a while.
If it's not the gas tank or fuel lines, it could be a fuel injector
https://www.700r4transmissionhq.com/...ells-like-gas/
or the fuel pump.
https://www.toyotanation.com/threads...cause.1513346/
Vacuum Technology:
CRUD = Contamination Resulting in Undesirable Deposits.
CRAPP = Contamination Resulting in Additional Partial Pressure.
Change your vacuum pump oil now.
Test. Testing, 1,2,3.
-
Most vehicles have a check valve so siphoning gas is not easy. Of course thieves may have tricks to get around this.
I had to drop the gas tank on one of my vehicles a while ago to service the sender assembly. I just could not pump out the gas due to the check valve and ended up using up the gas and then dropped the tank when about 2 gallons were remaining.
-
Or you could hot wire the pump a drain it from the fuel rail test port.
-
Post Likes - 1 Likes, 0 Dislikes
-
Originally Posted by
VTP99
Or you could hot wire the pump a drain it from the fuel rail test port.
Been there done that. 
"Is this before or after you fired the parts cannon at it?" - senior tech
I'm tired of these mediocre "semi flammable" refrigerants. If we're going to do it let's do it right.
Unless we change direction we are likely to end up where we are going.
"It's not new, it's better than new!" Maru.
-
Why not leave it empty when you park it prior to a trip?
-
Post Likes - 1 Likes, 0 Dislikes
-
Probably worried about condensation.
-
Post Likes - 1 Likes, 0 Dislikes
-
Originally Posted by
VTP99
Probably worried about condensation.
Yeah and with ethanol fuel you do have to be careful.
"Is this before or after you fired the parts cannon at it?" - senior tech
I'm tired of these mediocre "semi flammable" refrigerants. If we're going to do it let's do it right.
Unless we change direction we are likely to end up where we are going.
"It's not new, it's better than new!" Maru.
-
When all other possiblities have been properly discounted the one that's left must be it, or so the saying goes. So the logical conclusion is . . .
The Twilight zone.
-
Post Likes - 1 Likes, 0 Dislikes
Reply
Membership Chair/ARP Committee / Professional Member*
R600a liked this post.
