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SePtRa
07-25-2013, 05:40 AM
Hi all...

After driving me mad :help: I've come to you for some help....

So i have a 2007 1.0 Yaris Sol...

And for some time there is a issue... When i put the car in neutral and lower my speed the revs drop too low and then the car has to accelerate by himself to recover this happens 2 or 3 times in a row.... :iono::iono::iono:

Today as i'm diving home the this happened but some I've felt new symptoms too.. when i am accelerating the car seems to pause for a second and the go...

I've been to Toyota but nothing has been done... :eyebulge::eyebulge:

Thanks in advance!!!! :thanks::thanks:
CTScott
07-25-2013, 09:39 AM
Is the A/C on when this happens?
SePtRa
07-25-2013, 01:47 PM
No A/C Off... I Also forgot to say that doesn't happen every day.

I have a Mini VCI Cable with Techstream. I will try to check for error codes.
CTScott
07-25-2013, 03:07 PM
No A/C Off... I Also forgot to say that doesn't happen every day.

I have a Mini VCI Cable with Techstream. I will try to check for error codes.

Also, watch the data from the MAP sensor on your 1.0L with the techstream while it is occurring.
SePtRa
07-26-2013, 05:38 AM
So i went back to the car yesterday... No codes have been found...

I also watched the Map sensors as you said CTScott the values are:
~100 Kpa when its stopped.
As soon as i started the car i went down to around 30 kpa...

Unfortunately the issue did not occur when i was on the techstream...
ezhacker1
07-26-2013, 06:24 AM
Could the car be running too lean due to a vacuum leak. It will cause rough idle and see the RPM fluctuation, and hesitation during acceleration.
SePtRa
07-29-2013, 12:42 PM
New development...

Now when I start the car after a night on the garage it makes a Buzzing noise... Its loud enough to listen inside the car with everything closed..
CTScott
07-29-2013, 01:10 PM
New development...

Now when I start the car after a night on the garage it makes a Buzzing noise... Its loud enough to listen inside the car with everything closed..

That may be the fuel pump. The service manual for your engine seems to point to most issues, like what you are experiencing, being caused by the fuel pump.