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even more supercharger problem


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#1 rollavvti06

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Posted 13 September 2013 - 10:27 PM

ok the last problem i had turned out to be a broken intake stud which made it lean at idle,



now my problem is car runns lean in boost and a\f jump 12-17 and sounds like misses. here is the part that i dont get when i had that heat wave it ran great and then in the moring on the way to work it had problems again, so day after day same thing if it was above 80 for the temp it ran great. so one day after work i got on it right away "wot" to see if it was still acting up with a cold motor but hot air temp outside, well it still ran great.

so short story if you didnt read all of that if the air is hot it works great if its cool outside it sucks.

parts i replaced= maf, plugs, used O2 i had laying around front one btw. i have also reput my tune on many times and reset the stock computer many many times, fuel injector cleaner, and tried many different gases from station i know and trust

#2 rollavvti06

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Posted 15 September 2013 - 02:49 AM

Even swapped around vac lines on blower still ran lean

#3 51501ZZ

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Posted 15 September 2013 - 04:21 AM

What about your fuel filter/strainer in the tank or fuel pressure regulator just a thought. Mine had a similar problem on idle cylinder one was missing. One last thing I may sound dumb but I had an issue with the temp sensor that reads the outside temp. I would pour cold water on it the numbers on the dash would drop right after that the motor would idle perfect. Or I could of just been me? My 2 cents.
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#4 rollavvti06

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Posted 15 September 2013 - 12:00 PM

The intake temp sensor is built.into the mass air flow sensor I thought and I replaced it thinking same thing also the coolent temp.sensor.is reading as it.should.I.checked with my obd2 scanner, it has to be sensor related but I just don't know which one now I'm.stumped

#5 hughesjasonk

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Posted 15 September 2013 - 12:18 PM

Unplug your afr o2 and force it to go open loop and see if it smooths out

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#6 51501ZZ

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Posted 15 September 2013 - 12:25 PM

No the air temp sensor in front off the car that let's u know the outside temp reading, the one by the a/c condenser mine would read on hot days/in the dash 103 outside temp I would pour water on it the engine would idle better I would then look again at the dash outside temp It would say the correct reading 88... not the intake temp sensor, yeah that's a built in for our maf. Hey just a question have u ever replaced the vvt-i solenoid filter? What about your tps ?
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#7 rollavvti06

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Posted 15 September 2013 - 12:51 PM

Jason you mean the front o2

And I don't have a tps I'm dbw my temp sensor for outside temp is reading the correct temp but I don't think it will do anything but tell the car the dash reading and my problem is when it gets too cold not when it gets too hot so I would have to heat it up if I do what your saying. And no I have not messed with the vvti solenoid or filter I don't see that being clogged cause no matter what the temp was it would act bad but mine is just bad in cool weather

#8 hughesjasonk

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Posted 15 September 2013 - 01:51 PM

Yes the front sensor. It will throw it in open loop and you can figure out the maff and the trottle position sensor and the air intake temperature all at one time. You are going to run a little rich and throw code but don't worry about it just let it throw code then read everything and see if your idle smooths out. I have to do that sometimes with low speed tuning just so I can keep it out of closed loop.

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#9 rollavvti06

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Posted 15 September 2013 - 03:02 PM

It idles at 14.7 which is perfect but I will try that out when I get some time, and my obd reader tells me all that stuff throttle position and maf air flow amount so what exactly would.I be looking for

#10 rollavvti06

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Posted 15 September 2013 - 05:42 PM

Did you runs down the road one with o2 unplugged ran richer at idle and 14-17 in boost, I ran it again without the temp sensor for the out side twmp gauge on dash and nothing different

#11 hughesjasonk

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Posted 15 September 2013 - 06:41 PM

I tuned that way till my map was on point. My afr was 14.4

You're just looking for it to be running smooth. Personally I think you have a vacuum leak

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#12 rollavvti06

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Posted 15 September 2013 - 07:02 PM

It did run smoother the a/f were more consistent so you think.a vac leak even tho it runs great in the hot weather

#13 rollavvti06

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Posted 15 September 2013 - 09:53 PM

OK I'm getting closer to the problem there was a loose bolt holding fuel rail down then I discovered the seals were worn I replaced three with my old injector seals and now it boosts in 12.-13 so I think once I replace the last seal I should be at 11.5

#14 hughesjasonk

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Posted 15 September 2013 - 11:14 PM

I would look at replacing your afr o2 as well

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#15 51501ZZ

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Posted 16 September 2013 - 02:40 AM

The insulators. the smallest s*** damn. I'm glad you found it why dont you just buy them new bro 6 bucks at Toyota each.
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#16 rollavvti06

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Posted 16 September 2013 - 11:56 PM

I'm going to get some new ones it was a on the fly fix going to pull the rail this weekend and redo the vac lines

#17 rollavvti06

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Posted 20 September 2013 - 09:30 PM

OK still runs lean all up to redline about5k rpm and up its 15 a/f I even put in the stock header and original o2 , that's a long story don't ask. So I'm stumped had 2 o2 sensors both made same result

#18 hughesjasonk

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Posted 21 September 2013 - 12:42 PM

what engine management do you have?
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#19 rollavvti06

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Posted 23 September 2013 - 04:30 PM

Emb and camcon

#20 hughesjasonk

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Posted 23 September 2013 - 05:11 PM

one of those two or both might be your issue. do you have fuel tuned on your camcon or just ignition?
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