[txpres]

I am having a problem starting my 2012 Sequoia when the outside temp is 40 deg or below.
It acts like it is not getting enough gas. It cranks for over 5 sec. Then it will stop. It does this 2 or 3 times before it finally starts. When it does start, it runs real ragged like it is not a rich enough mixture. After about 10 sec, it will settle down and run correctly.
It only does this if the outside temp is below 40 deg and the car has not been run recenly (such as sitting overnight). The car will then start fine for the rest of the day if used frequently.
Car runs great when warm. Mileage is 40k
Does the Sequoia have a cold start injector? Or something similar? Any ideas on what is the problem?

 

[hardtopte72]

Is it flex fuel?

 

[txpres]

Yes, it is Flex Fuel.
However, the only fuel I have used is normal gasoline.

 

[hardtopte72]

I wonder if it's got a switching problem with the fuel systems.

Do you have a scanner to measure data? Does it have an aftermarket air filter like K&N?

 

[txpres]

It has the stock air filter, not aftermarket.
I do have a scanner that measures some data, however the problem only occurs when the temp is below 40 deg and the car has not been run for several hours, such as overnight.
I did stop by a dealer when I was in CO and having the problem. He put his scanner on it and started it up and said everything was fine. But of course the car was warmed up and started normal.
Not sure what good it would do to go to a dealer here in Austin since it generally does not get cold enough to see the problem.
If I had not gone to the cold country, I would not know that it was having a problem. Starts great here.
Also, once it warmed up when it was cold, it ran great.

 

[bluedeval03]

I am having a problem starting my 2012 Sequoia when the outside temp is 40 deg or below.
It acts like it is not getting enough gas. It cranks for over 5 sec. Then it will stop. It does this 2 or 3 times before it finally starts. When it does start, it runs real ragged like it is not a rich enough mixture. After about 10 sec, it will settle down and run correctly.
It only does this if the outside temp is below 40 deg and the car has not been run recenly (such as sitting overnight). The car will then start fine for the rest of the day if used frequently.
Car runs great when warm. Mileage is 40k
Does the Sequoia have a cold start injector? Or something similar? Any ideas on what is the problem?

Try this to see if the fuel rail is loosing pressure when you turn the key off and it sits for a bit. Cylce your key to on, notch before start, hold for 4 seconds, back off. Repeat this 5 times, will only take you about 30 seconds. Then start to see if the issue changes, or stays the same.

 

[txpres]

Try this to see if the fuel rail is loosing pressure when you turn the key off and it sits for a bit. Cylce your key to on, notch before start, hold for 4 seconds, back off. Repeat this 5 times, will only take you about 30 seconds. Then start to see if the issue changes, or stays the same.

I tried it this morning and car started fine. However, the outside temp is 55 deg so I would have expected it to start Ok anyway.
It has been starting fine even when left off overnight since I got back to Austin with the mild temps we have here.
We are due for some very cold weather later this week and I will try it then.

 

[txpres]

Try this to see if the fuel rail is loosing pressure when you turn the key off and it sits for a bit. Cylce your key to on, notch before start, hold for 4 seconds, back off. Repeat this 5 times, will only take you about 30 seconds. Then start to see if the issue changes, or stays the same.

It finally got cold enough here in Austin to test.
I did what you suggested and it started right up even with temp at 26 deg.
I then waited several hours and tried starting it the normal way. It required cranking for over 10 sec.
Looks like the fuel rail is loosing pressure.

Question: what device is causing the loss of pressure? Is is easy to replace?

 

[heartdisease]

Do you smell any gas when you are around it? I would check the fuel filter first, I don't know where it's at or how it fits in line but I have had some drip when changing them if I didn't have things quite right. Perhaps a seal at that point has gone bad or is pinched?

 

[txpres]

Do you smell any gas when you are around it? I would check the fuel filter first, I don't know where it's at or how it fits in line but I have had some drip when changing them if I didn't have things quite right. Perhaps a seal at that point has gone bad or is pinched?

No Fuel smell. I will check and replace the fuel filter.

 

[vitamin_J]

Quite curious to find out more. My 2013 is getting checked

Dealer is looking at my 2013. After several cold days, starts have been longer and some sputtering. Now TRAC OFF, Check Engine lights are on with the 4LO light blinking. Seems to drive normal.
Initial report from the shop is sediment/sand in my fuel tank. Don't know about that. When I asked about the codes they said it had mis-fire codes.
I am religious about where I get gas and none of my other vehicles have this problem.