Engine shutting off during long trips.

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I've had this happen twice.

Both times on hot days, engine at high temps.

Both times fuel under 1/4 tank.

Coasted into dealer the 2nd time they told me overheated fuel pump.
 
Did you change the pump? Did it sole the problem?
 
Did you change the pump? Did it solve the problem?
 
Is the fuel pump accessible enough that it could be wrapped with a ceramic insulation like this http://www.jegs.com/i/Taylor/895/2544/10002/-1
I had an Italian car that had an issue with overheating the ABS pump and wrapping it with the ceramic blanket material worked wonders.
Just an idea. Obviously won't work if the pump is in the fuel tank...
 
If it stalls due to fuel pump issues, it will not throw a dtc/cel.

It is hard to diag a car over the net, but from what im reading, I would replace the fuel pump.
 
ton504 said:
If it stalls due to fuel pump issues, it will not throw a dtc/cel.

It is hard to diag a car over the net, but from what im reading, I would replace the fuel pump.
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I'm taking it to a Toyota specialist this week, this seems to be pretty good advice.
 
So OBDII doesn't pick up the drop in pressure from a stumbling pump? Or the misfire? Or the lean mixture? Surprising considering it can pick up other seemingly benign events such as a tiny leak in the EVAP.
 
OregonLC said:
So OBDII doesn't pick up the drop in pressure from a stumbling pump? Or the misfire? Or the lean mixture? Surprising considering it can pick up other seemingly benign events such as a tiny leak in the EVAP.
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On the newer cars with the mechanical fuel pumps, yes. If it misfires then it may have a dtc in pending which does not light up the cel. But in the cases i worked on, the fuel pump either works or it doesnt. The lean condition prob has to be a 2 trip detection. And usually the fuel pump runs or doesnt run and not starve the engine therefore doesnt run lean long enough to set a dtc.

The evap leak is also a two trip dectection.
 
OregonLC said:
So OBDII doesn't pick up the drop in pressure from a stumbling pump? Or the misfire? Or the lean mixture? Surprising considering it can pick up other seemingly benign events such as a tiny leak in the EVAP.
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Great point, although this issue rarely throws a code, it happened so many times and after the third or fourth time, it did throw a code. I checked the codes and it was misfire in all even cylinders and lean condition on both left and right banks.
 
ton504 said:
If it stalls due to fuel pump issues, it will not throw a dtc/cel.

It is hard to diag a car over the net, but from what im reading, I would replace the fuel pump.
Click to expand...

Thanks, you don't think the charcoal canister tsb has anything to do with this issue? You think the pump would fix the problem?
 
Earlier in this thread I speak of having similar issues. Initially I would have a stalling condition when running in hot weather. I had the fuel pump replaced summer of 2012 and this problem went away, at least for the last two summers. Additionally I had an issue where my 2006 LX would not restart for a period of time after running in hot weather. I had the cam position sensor replaced when I had the 90k service done in June of 2014 and so far I have not had the no restart issue when running in hot weather. Please do not take any of this as a guarantee that doing this will solve this problem, but it seems to have cleared up for me. It is still in the back of my mind that I may potentially still have problems down the road. It would be great for many of us if we could determine the true root cause of these two issues.
 
kklaus121 said:
Earlier in this thread I speak of having similar issues. Initially I would have a stalling condition when running in hot weather. I had the fuel pump replaced summer of 2012 and this problem went away, at least for the last two summers. Additionally I had an issue where my 2006 LX would not restart for a period of time after running in hot weather. I had the cam position sensor replaced when I had the 90k service done in June of 2014 and so far I have not had the no restart issue when running in hot weather. Please do not take any of this as a guarantee that doing this will solve this problem, but it seems to have cleared up for me. It is still in the back of my mind that I may potentially still have problems down the road. It would be great for many of us if we could determine the true root cause of these two issues.
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Thanks for the feedback, very helpful. It seems like the fuel pump is the root issue. I will report back after replacing the fuel pump.
 
I am in the same boat here and interested in what you find with replacing the fuel pump. I have a 2006 LX and originally it would idle low and rough after pulling a camper in the summer. Now it is doing it on 75 degree days after just driving. When mine overheats I get a strong gasoline vapor smell. Do you get the same?
 
My mechanic told me that the 040 fuel pump does not fit, it's connectors are different and it is a longer fuel pump. He recommended the original fuel pump which came with the LC, he said Toyota has an updated version of it.

Anyone know anything about this?
 
The fuel pumps are part numbered as follows:

Year built 1998-5/2005: part #23221-66040

Year built 5/2005-eop: part #23220-50160
 
Has anyone had this happen to them when running more than 1/4 tank of gas? Also, when working normally, can you hear the fuel pump run when you turn the key to on but not start? If so, a good test the next time it happens is to see if you can hear the pump run. If the pump isn't running, the overheated fuel pump might just be the issue.

If it's only happened when there's less than a 1/4 tank of gas, I suspect that the overheated pump is the issue.
 
1meancruiser said:
My mechanic told me that the 040 fuel pump does not fit, it's connectors are different and it is a longer fuel pump. He recommended the original fuel pump which came with the LC, he said Toyota has an updated version of it.

Anyone know anything about this?
Click to expand...

When my pump was replaced my mechanic complained of this same issue with the connectors being different and fit issues. He insisted on getting the right replacement that would drop in. I don't know the part number that he ultimately used. Maybe this is a clue to some issue with the factory installed pump?
 
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