Truck won't run.. P0100, P0110, P0115, P0120

[Wainiha]

^This a good question! I want to learn something.

[Scuba]

Originally Posted by terryj5

Mr. Scuba

It would be really cool if you could help out some of us "higher mileage" folks (and rigs) with some more history and info on your fuel pump/rig.

Here is what I am getting at. I was thinking of packing an inline electric fuel pump in the trail spares box with the appropriate stuff to "cut it in" between the tank and the filter should an in-tank pump failure occur on the trail. I know that pump failure is not common but obviously it does happen and it will stop you dead.

So here goes.

Not sure if that would work, honestly.

Originally Posted by terryj5

A few years back, you posted that a fuel filter change helped your idle. Was the filter full of crap, rust maybe?

Has your tank seen any "trail contact" that could have inflicted some kind of physical stress to the pump?

Are you certain that the pump was bad (bench test), not just a connection?

Was there any crap on the pump filter itself?

I don't recall posting about a filter helping my idle. Its been a crazy couple years. It's possible though, that it did help with idle at the time.

I dented the tank badly back in '10 at the hammers. But that was 70K miles ago. I figure if the pump was damaged as a result to that, I would have noticed a long time ago. Though, it did cause me to have to bend the fuel pump bracket a tad so that I could get the pump in.

Electrical connections were fine and strong when I pulled the pump out.
The thing that might have actually been the cause of the issue?
When I pulled the fuel pump bracket out of the tank, since it is bent, the pump doesn't sit on the bottom of the bracket to "hold" it in place.
After a couple years of wheeling and the pump freely moving around, I believe the little 2-3" fuel hose that connects the pump to the metal line got loose. When the pump was doing its job the loose hose was letting the fuel go out of the top of that hose instead of up the metal line. Thus, no pressure.
I decided that I didn't want to waste my time trying to get that line tight and button everything up just to find out that the pump really wasn't building enough pressure. So, I just put the new pump on, fastened it to the bracket, and went on my way. I'll keep the old pump and fiddle with it if (when) this vatozone one bites the dust.

Originally Posted by terryj5

Now here's the thing that would really help. Would you go suck on the outlet of your old pump? Of course feel free to use protection, like a piece of hose. I am curious, if in your opinion, an inline pump would stand a chance of "sucking" thru a dead "in tank" pump (just to get home). Some pumps have check valves that could provide to much resistance to "sucking". Most fluid pumps "pump" way better than they "suck" and can be rendered useless by a small bit of resistance on the supply side. I realize we are not talking real numbers here, just looking for a gut sort of feeling.

No, I'm not doing that. GTFO
I'll gladly send it to you if you want to try sucking on my pump.

Originally Posted by terryj5

99% of the time we travel solo and with 220K on the clock, the more potential failures we can cover the better.

Inline pumps with simple hose barb connections, generating just about the right pressure can be had for about $75 (Summit Racing). If this would "get us home" I would add one to the kit.

Thanks in advance

Like I said earlier, not sure if that would work. I'm not sure how big of a pump you would have to run to get enough pressure built to get fuel to come through the in tank pump.
Really, I'd just carry a spare pump.
The tank isn't THAT hard to get out.

[terryj5]

Thanks for the info on your situation.

I have done the inline pump thing several times on cars with failed in tank pumps but not on a Taco much less a Toyota.

I will be doing a PM filter change in a few days. I will put my vacuum pump/gauge on the line from the tank and see just what it takes to move fuel thru the Taco pump. Actually moving fuel thru the system will be a better measure anyhoo.

The price on the Vatozone unit seems reasonable, might just go that route.

Edit
After a little search, OEM Aisin pumps with screen can be had for about $140. That beats the heck out of around $253 from Toyota online shops.

[Scootn2nature]

stumble feels like out of gas........when it happened to me it ended being a plugged front cat .eventually it melted out the bottom of the vacuum modulator. thank god I was under the 8-80 rule.`

[Scuba]

Originally Posted by Scootn2nature

stumble feels like out of gas........when it happened to me it ended being a plugged front cat .eventually it melted out the bottom of the vacuum modulator. thank god I was under the 8-80 rule.`

Had a cat almost completely plug up on me. I would have known if that was the issue this time.
The thing that tripped me out, and made me think I was getting enough fuel, was the fact that when the issue started I checked out my plugs and they were fouled out and wet with gas.
That's why I started looking elsewhere.

I realize I probably look like a dumbass for disassembling half of the truck and replacing $600 in parts before checking the fuel pump, but oh well.
At least I have a brand new MAF and IAC, as well as a new to me ECM, and I can keep the old ones as spares knowing that they are still operable.
Think I may wrap them up in tin foil and keep them in an EMP safe box JUST incase..

[Wainiha]

Originally Posted by Scuba

Had a cat almost completely plug up on me. I would have known if that was the issue this time.
The thing that tripped me out, and made me think I was getting enough fuel, was the fact that when the issue started I checked out my plugs and they were fouled out and wet with gas.
That's why I started looking elsewhere.

I realize I probably look like a dumbass for disassembling half of the truck and replacing $600 in parts before checking the fuel pump, but oh well.
At least I have a brand new MAF and IAC, as well as a new to me ECM, and I can keep the old ones as spares knowing that they are still operable.
Think I may wrap them up in tin foil and keep them in an EMP safe box JUST incase..

Probably no consulation to you, at least you helped us learn something.

[Wainiha]

Hey Scuba I'm running the P0100 and110. What were your AFRs during your issues?

Mine is stuck at 14.6 and won't swing either way. WOT or throttle cut.

Other codes and PIDs were swaying me towards MAF or A/F sensor replacement.

Today I just got P1130 and 1135. A/F circuit or sensor.

Still when I searched the 100 and 110 codes I got your thread. The fuel pressure is a common possible issue listed( as well as a few more) by the FSM for my codes. Made me wonder...

Just going in circles for now.

Asked it here and RST:http://www.rocksolidtoys.com/forum/showthread.php?t=444