2006 Limited bogging down when throttled

cgl4au

New member
2006 Limited V6 bogging down when throttled - SOLVED...I think

Alright everyone, I am stumped. I purchased my 2006 Limited V6 (139K miles at the time) on May 12th (Mothers Day) and it has given me nothing but issues. Just to give you a little history, the previous owner lived off a dirt road for the last 5 years or so. It was a little dirty but nothing out of the ordinary...at least that's what I thought when I bought it. The plugs were replaced at around 120K and it ran fine for the first week. Then, on a road trip out of down it started stalling and I had the battery replaced at the stealership. It seemed to resolve the issue until I received the dreaded p0171 and p0174 codes exactly a week later. I purchased a new MAF based on reading some posts here and it cleared the codes. Since then, it had running been fine until today (ironically on Fathers Day).

We had just driven about 50 miles and had no issues and when we were at a long stop light (approx. 2 minute wait), it started bogging down (almost stalled) when I accelerated from the stop. I let off the throttle a bit and then it caught up and allowed me to keep driving. Once I got to my driveway, I let the motor run a bit while parked and it seems to idle okay. However, when I give it any sort of throttle, it bogs down again and eventually catches up and/or stalls. I was able to replicate this result several times and still no CEL. I'm thinking it is a fuel issue (filter/bad pump) but wanted to see if I could get others' opinions. From reading the boards, I know that the pump/filter assembly are both in the tank so it would be a PITA to remove myself. Has anyone run into similar issues with their 4th gen? At this point, I am open to any suggestions. Thanks to all in advance!

***** UPDATE - 6/19/2013 *****
I just wanted to update everyone. I believe that I have narrowed down the issue with my T4R (95.3794% sure) ;):. While having lunch with a good friend of mine today, who actually just purchased a 2013 Camry LE (less than 1500 miles on the car), I learned that he also had the exact same issue I described over the weekend.

Jokingly, I mentioned not to get gas at the Kangaroo Express here in Montgomery, AL because it was where I remember filling up right before the stalling/hesitation occurred. Come to find out, he also filled up at that gas station on the exact same day. Both of us rarely use that gas station to fill up, but, it was just our luck that we both got some of the same contaminated gas :ohwell:. My wife also has a 2012 Camry XLE and I know that this is definitely not typical behavior out of a Camry, especially a new one. I just thought you all might get a laugh out of this one!

I have since filled up with some Chevron 93 octane and have had no further issues since. I did take it to the dealer yesterday morning to hook it up to a fuel gauge and the pressure never dipped after over an hour of them running it at idle. So, the combination of the throttle body cleaning along with purging the s***ty gas through the fuel lines seems to have fixed it. Hopefully, I can have a few years of just worrying about regular maintenance now. Thanks to everyone for their suggestions! This forum has been great!
 
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throttle body?

I guess that could be it too. Do you think I just need to clean it? I did see from the maintenance records that an "induction service' was also performed at the dealer during the 120K service with the previous owners. I wonder if that generically means "replace air filter" or if it also includes cleaning the throttle body, etc.

Also, as a side note, I did try listening for the fuel pump whine when turning the key to the On position (motor not started) and couldn't really hear anything.
 
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I guess that could be it too. Do you think I just need to clean it?

Also, as a side note, I did try listening for the fuel pump whine when turning the key to the On position (motor not started) and couldn't really hear anything.

couldn't hurt to clean it and it's not too hard
 
I just checked and part of Toyota's induction service includes throttle body cleaning. It seems as if there is plenty of air coming in, but not enough fuel to keep it going after I give it some gas and eventually stalls. If needed, I can take a video of what is going on so everyone can see what is happening.
 
I just checked and part of Toyota's induction service includes throttle body cleaning. If needed, I can take a video of what is going on so everyone can see what is happening.

Yeah, that would be nice. I don't know much about the engine, but i'm sure someone else will chime in.
 
Yeah, that would be nice. I don't know much about the engine, but i'm sure someone else will chime in.

Thanks so much for your suggestion! It definitely made a lot of sense to me. Hopefully I can get to the bottom of this. I just want to be able to enjoy my T4R for more than a few weeks at a time.
 
if i read correctly, you had the problem, then replaced the battery, which reset the computor, & all was fine for awhile until you got the p0171 & p0174 codes, right? since you have cleaned & replaced things already, maybe its a bad 02 sensor. P0174 TOYOTA Air/Fuel Mixture System Too Lean Bank 2 OBDII Engine Light Trouble Code | Engine-Codes.com

It could very well be. The only thing that gets me is that I have replicated the issue at least 5-6 times today and there is no check engine light at all. Replacing the MAF reset these codes and I haven't had any since. From what I can tell bad o2 sensors tend to throw a code pretty quickly, right? I am definitely stumped. I can say that the rpms tend to fluctuate a bit at a stop (between 700-800 and eventually dipping down below 500). In park, it idles fine but sputters when i give it any decent bit of throttle.

After looking around, the only things I can find that exhibit similar symptoms without a check engine light are fuel issues (injectors, filter, pump), vacuum leaks, or ignition issues (coil pack, wires, faulty plugs).
 
So, I decided to drive the T4R for about 10 min around my neighborhood after the truck had cooled off for a couple of hours and had no issues while driving. After that, I let it sit stopped in gear for about 2-3 min to mimic the stop light and idled in park for another 5 min and it started the sputtering/choking again. Then, I tried taking a video of it soon after (30 sec or so) and of course it decided to act as if nothing was wrong. Ugh!!

Would a faulty ignition coil or perhaps bad wires cause these symptoms? The dealer did run a diagnostic on it when replacing the battery and found that the plugs were supposedly all fine and there were no vacuum leaks. It idles okay (fluctuates a lot when a/c is on ~500-1000 rpm) without stalling at first and doesn't give me any issues until I actually give it some throttle in either Drive or Park. After the initial sputter, it starts doing it's crazy dance until it eventually stalls. It also has a hard time starting up shortly after this occurs if that makes any difference but eventually comes back to life. Thanks to all so far for their suggestions!
 
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i would take out the plugs and check the gap. then take out that jumper fuse in the fuse box, turn on the headlights to discharge the electricity for 30 mins, after that check all wires connecting to sensors, take out plugs and spray some contact cleaner if you have too.
 
I was able to clean the throttle body like zopperman/others have suggested and the fluctuating idle seems to have improved. It was pretty gunked up. However, the intermittent bogging still occurs once the engine it at temp (after at least 10 minutes of driving). I was able to park it and let it idle in my driveway and noticed a louder than normal whining noise coming from the rear of the vehicle only when it starts to bog down/stall and basically goes away when the motor corrects the idle speed. It seems that it could be coming from the fuel pump. Do pumps typically go bad in these vehicles or could it be something clogging up the in-tank fuel filter? I am guessing the previous owners may have ran the tank near empty a few too many times and I am the lucky one reaping the benefits of this :rolleyes:. I don't think I am quite qualified to drop the tank and replace the pump myself. Does anyone know how much does this service typically costs at the dealer?
 
It doesn't sounds like a fuel pump issue to me. It seems to be related to the vehicle's operating temp.

It sound like to me more of an O2 sensor issue. When you accelerate (open loop mode), you're getting bad readings from the O2 and one of the common symptoms is hesitation under acceleration.

Another is poor gas mileage- Has your gas mileage changed at all??
 
If it was briefly helped by cleaning the throttle body, I would pick up a couple cans of seafoam to run through it. For $8 or so a can it can't hurt to try it first and it can only help.
 
If it was briefly helped by cleaning the throttle body, I would pick up a couple cans of seafoam to run through it. For $8 or so a can it can't hurt to try it first and it can only help.

I actually seafoam'd it two weeks ago. Ran 1/2 a bottle through the vacuum line and added a full bottle to a full tank of gas. I was talking to a Lexus Tech and he seems to think that it is a fuel-related issue. Our pumps typically don't go bad according to him. He said for me to check the fuel pressure and that it could be a clogged filter in the tank or the pump is sucking in air. It has been really hot down here in Alabama and I am wondering if it's related to the heat. It never really did this a month ago when it was at least 10-15 degrees cooler during the day.
 
It's sounding like a fuel problem to me. Either clogged injectors, clogged fuel filter, or something in the lines is blocking flow (not sure how it could get in the lines, but I've seen it before)

I actually have a friend with a 1995 Lexus LS400 but his doesn't idle well. Give it gas and it dies out. It's been a wild goose chase with that car. 123k miles and it sat for 6 years.
 
It's sounding like a fuel problem to me. Either clogged injectors, clogged fuel filter, or something in the lines is blocking flow (not sure how it could get in the lines, but I've seen it before)

I actually have a friend with a 1995 Lexus LS400 but his doesn't idle well. Give it gas and it dies out. It's been a wild goose chase with that car. 123k miles and it sat for 6 years.

I am hoping you are right. I gave in and dropped it off at the dealer this morning. It seems to occur only when idling after at least minute or so (when engine is at temp with the a/c on). It doesn't do it while the vehicle is in motion. I'll keep everyone posted. Thanks to all for their advice. I just want to enjoy my T4R for more than a couple weeks at a time.
 
Thanks for the posts and updates because I just got the same codes and same symptoms and will do what you did.
 
***** UPDATE - 6/19/2013 *****
I just wanted to update everyone. I believe that I have narrowed down the issue with my T4R (95.3794% sure) ;):. While having lunch with a good friend of mine today, who actually just purchased a 2013 Camry LE (less than 1500 miles on the car), I learned that he also had the exact same issue I described over the weekend.

Jokingly, I mentioned not to get gas at the Kangaroo Express here in Montgomery, AL because it was where I remember filling up right before the stalling/hesitation occurred. Come to find out, he also filled up at that gas station on the exact same day. Both of us rarely use that gas station to fill up, but, it was just our luck that we both got some of the same contaminated gas :ohwell:. My wife also has a 2012 Camry XLE and I know that this is definitely not typical behavior out of a Camry, especially a new one. I just thought you all might get a laugh out of this one!

I have since filled up with some Chevron 93 octane and have had no further issues since. I did take it to the dealer yesterday morning to hook it up to a fuel gauge and the pressure never dipped after over an hour of them running it at idle. So, the combination of the throttle body cleaning along with purging the s***ty gas through the fuel lines seems to have fixed it. Hopefully, I can have a few years of just worrying about regular maintenance now. Thanks to everyone for their suggestions! This forum has been great!

My dads 4runner has been having almost the same exact issue. He filled up at a chevron in a sketchy area right before the problems occured. We cleaned the maf and the problem went away. Until he filled up at the same gas station a couple weeks later. This time we took it to the dealer and a local toyota place where they both found no problems at all. We cleaned the throttle body, replaced the maf and an oxygen sensor and got new gas and the problem is gone. Who knows if the gas did it or it was just a coincidence, but Im glad to have it fixed.
 

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