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Help-2007 Tundra has poor power, blinking engine & 4 LO light, VSC on, Accelleration

I just had my 2007 Tundra 5.7 L 4WD Automatic with 39000 mi truck lose power while on the highway about 10 days ago after a record cold night. I was b arely able to maintain 35-40 mph even with the pedal floored...around the same time, I noticed that my engine light was flashing, my my 4 LO light was flashing too, and my VSC light was on steady. I was in 2 wheel drive at the time and I had just had my Truck serviced 3 days previously. This was a previously perfectly functioning unmodded 2007 Tundra.
I first took it to my local mechanic- after it sat over nite( this was a warmer night-in the 30's) it started up fine with no lights, but he hooked it up to the computer and it said something about possible moisture in the air intake might have frozen made it stick open-but he felt it was safe for a weekend 400 mile trip.
Well, we got to St. Louis OK, but then after 2 cold nights parked out side at the hotel parking lot...after about 2-3 minutes drivingtowards home, as soon as I tried to accellerate on the interstate onramp, it just slowed down, and just like the first time above, I was barely able to maintain 35-40 mph even with the pedal floored...and at the same time, I noticed that my engine light was flashing, my 4 LO light was flashing , and my VSC light was on steadily. I was in 2 wheel drive at the time.
I called the 800 Toyota help line as no dealers were open as it was Sunday... we were only a couple mi from the closest Toyota Dealer so I carefully drove it there. It was then that I had my first experience of the truck trying to "Speed-up by itself"(it did not feel as if the accellerator was stuck)as I was slowing down for a couple stoplights-it was nothing I was'nt able to deal with as I was ready for anything at that point(I'd gotten my recall letter a few days earlier about the accellerator issue)...anyway, we found a hotel (after waiting for a taxi for over 2 1/2 hours and stayed the night till it could be seen the next day.
The dealer was nice enough to work on it immediately the next morning when they opened. Toyota said there was some kind of issue with moisture in the air intake that may have frozen but it seemed to be ok now, they drove it for 24 miles with no further problems and felt it safe to drive home for the 200 mile trip...but felt I should check in with my dealer when I got there, and they fixed my "accellerator problem". The Truck worked fine on the 200 mile drive home.
But the next morning on my 6 mile ride in from the country to town-about 2 miles from leaving home, the exact same problems reccured. I just dropped it off at the Iowa City Toyota dealer saturday Feb 27th where I bought it and its not clear if this is related to the recall issue(probably not) and they think its possible "from the sounds of it and the Computer readouts, that it will need an entire new air intake system( possibly around 2000.00!! I've been quoted)-though they had'nt looked at it yet.
In retrospect, I realized that this had happened acouple times last winter when I went to visit my daughter and had to park outside at night on a few cold nights and the 4W drive lights came on and I had to go through all the tricks in the manual to get them to go off( I can't remember if the manual tricks worked or it got warmer or after I shut it off for awhile it got better on its own- but it only happened 2-3 times so I figured maybe the truck had just been cold since it never happened again till now...but now I see that this seems to be the same problem I'm having now. I strongly encourage anyone who gets this problem to get it checked out asap and insist on getting the intake system THOROUGHLY looked at!! I've searched and found that a few other owners have had simlar problems, could it be a temperature related issue?? It just does'nt seem right that a problem of this magnitude should be occurring so early on this truck...it looks like another glitch to me. Let me know if anyone else has had this problem...DAcat :ts:
 

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Re: Help-2007 Tundra has poor power, blinking engine & 4 LO light, VSC on, Accellera

Search this forum and the web and you will find dozens of people with the same problem. Most have the same trouble codes but dealers are inconsistent with diagnosis, and most repairs run into the thousands without a clear and definitive fix. See this other thread for more detail:
http://www.tundrasolutions.com/forums/tundra/181377-air-induction-pump/
 

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Re: Help-2007 Tundra has poor power, blinking engine & 4 LO light, VSC on, Accellera

Thanks Wileetundra:first: for the tip on the Air Induction pumps...it looks like you were right...I got off the Phone with Toyota this AM and after driving a loaner Corolla for the past 6 days, I was told that they got in 2 replacement Air Injection Pumps and they will be putting them on my Tundra today and it might be ready by tonight...I sure hope that fixes the problems...we'll see...DAcat :ts:
 

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Re: Help-2007 Tundra has poor power, blinking engine & 4 LO light, VSC on, Accellera

Glad the info helped. Don't celebrate until it proves to be fixed for a few weeks or longer. Make sure to update us after you find out. Good luck!
 

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Re: Help-2007 Tundra has poor power, blinking engine & 4 LO light, VSC on, Accellera

This sounds very similar to another members issue on here. If the solution your dealer offers does not work you may want to consider what solved this members issue. I sure hope they figure it out quickly. You may want to read this thread? Best of luck with this and please let us know what fixes your problem!!!!

http://www.tundrasolutions.com/forums/tundra/181814-help-hesitation-sudden-brief-loss-power-8/
 

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Discussion Starter #6
Re: Help-2007 Tundra has poor power, blinking engine & 4 LO light, VSC on, Accellera

Well, so far good news...I got my tundra back sat afternoon after toyota repaced both AI pumps free...no cost whatsoever to me even for the use of a corolla for a week as a loaner, no cost for diagnostics or anything...they even cleaned my truck inside and out...and this was a couple thousand miles after warranty had expired...Toyota said it was for good will. I drove it 70 miles home and 12 miles round trip yesterday and today...the only issue is I don't like the way the gas pedal feels like compared to before (stiff?), it may accellerate sligthly slower than before, and the ride seems a little jerky, which right now I' m blaming on the new air intake pumps and if it does'nt smooth out after this week I'm calling back my dealer. All in all it was a scarey experience I would'nt wish on anyone and I worry about it happening again later on and who will pay the 5000.00 repair bill then?? But I think Toyota has treated me really well on this deal so far!!! Although I won't celebrate till I'm sure the fix is good for a couple weeks more...for now, I hope you all get as lucky :bathbaby: ...peace...DAcat :ts:
 

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Re: Help-2007 Tundra has poor power, blinking engine & 4 LO light, VSC on, Accellera

My problem was very different, it ended up being an electrical connection, as described to me by the service manager a wire to the fuel pump relay was partially connected by the left side kick panel. . . not sure if it entirely makes sense but they fixed mine too eventually and now two weeks this truck drives fine again.

I was over 50,000 miles but I had bought the extended warranty, which is a good thing because it took them countless hours in the shop to find the problem.

Good luck with yours buddy.
 

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Re: Help-2007 Tundra has poor power, blinking engine & 4 LO light, VSC on, Accellera

Similar in nature, different in cause.
 

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Re: Help-2007 Tundra has poor power, blinking engine & 4 LO light, VSC on, Accellera

I have an 2007 Tundra 5.7L V8 4WD with 300K miles. When I pushed the accelerator down, the RPMs go up but the truck only gradually increases in speed. Then I let off on the accelerator,below 2000 RPMs then the truck speeds up all while the VSC, 4Low, and skid lights, are all flashing with the engine light on. So I'm going to try to disconnect the AIP to see if this will solve the problem. I been to several mechanics and 3 dealerships and they all give me a different answer for this problem. Has anyone resolved this issue by disconnecting both AIPs?
 

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Re: Help-2007 Tundra has poor power, blinking engine & 4 LO light, VSC on, Accellera

That light pattern does not match the AIP failure patterns.
lights.pdf
What did the dealers say that it was??? They should have read the codes with a Techstream.
 

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Re: Help-2007 Tundra has poor power, blinking engine & 4 LO light, VSC on, Accellera

I tried the "tap on the valve" method suggested in another thread here discussing the same AIP system failure. You need a long screwdriver for the Driver's side valve. I had to use something much longer for the passenger side valve, and I accessed it from below the passenger side inside the frame rail beside the transmission. As suggested before YMMV and please use discretion with your tapping, as the valve bodies are made of aluminum and plastic....

Once the tapping was complete I reconnected the air pump electrical connectors and re connected the battery. Upon startup my CEL was cleared and the return of the blinking lights and CEL has not happened! Two days of driving and all is well!
 

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Re: Help-2007 Tundra has poor power, blinking engine & 4 LO light, VSC on, Accellera

Thanks for the info!
It has been added to the spreadsheet.
 

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Re: Help-2007 Tundra has poor power, blinking engine & 4 LO light, VSC on, Accellera

I have an 2007 Tundra 5.7L V8 4WD with 300K miles. When I pushed the accelerator down, the RPMs go up but the truck only gradually increases in speed. Then I let off on the accelerator,below 2000 RPMs then the truck speeds up all while the VSC, 4Low, and skid lights, are all flashing with the engine light on. So I'm going to try to disconnect the AIP to see if this will solve the problem. I been to several mechanics and 3 dealerships and they all give me a different answer for this problem. Has anyone resolved this issue by disconnecting both AIPs?
DAMN, did I read this right you have 300,000 miles on your 07 Tundra,if so that may be a new record, hell they outa good will you for the miles alone.
 

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Re: Help-2007 Tundra has poor power, blinking engine & 4 LO light, VSC on, Accellera

Wow am glad and extremely ticked to hear your story. Glad that your Toyota dealership did the right thing to correct the issue. Am ticked because I have an 07 and they did not do a thing to help me out and charged me over 3k.
 
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