throttle issues?

Hi again,

I have taken the car to another place to look at and after a lot of sleuthing, he can't find anything wrong with the car or any of the sensors. Mind you, he did manage to pull the gear stick out of the housing while test driving it, which i will now have to pay him to fix...:twisted:

Anyways, this got me thinking about when the problem started, which was with the install of a solid flywheel and new clutch. Could it be that the flywheel installed is too light for the car? I have read that the dual mass flywheels are very heavy in comparison (9-10kg vs 5-6kg), which is the standard for my car. This would mean that now the flywheel has camparitively little inertia, which would explain why the car lunges and reacts so vigorously when the throttle is applied or removed etc...

What do you think of my theory? Is it possible to buy a heavier flywheel?

catchas.

J.
 
joshuah said:
Hi again,

I have taken the car to another place to look at and after a lot of sleuthing, he can't find anything wrong with the car or any of the sensors. Mind you, he did manage to pull the gear stick out of the housing while test driving it, which i will now have to pay him to fix...:twisted:

Anyways, this got me thinking about when the problem started, which was with the install of a solid flywheel and new clutch. Could it be that the flywheel installed is too light for the car? I have read that the dual mass flywheels are very heavy in comparison (9-10kg vs 5-6kg), which is the standard for my car. This would mean that now the flywheel has camparitively little inertia, which would explain why the car lunges and reacts so vigorously when the throttle is applied or removed etc...

What do you think of my theory? Is it possible to buy a heavier flywheel?

catchas.

J.
Click to expand...

Was it an aftermarket flywheel? Subarus arent big fans of lightened flywheels.
 
I'm pretty sure. 1st clutch was a clutch-pro clutch kit and flywheel. They then installed a new Exedy clutch, but re-used the flywheel. Suffice to say it made no difference.
I see that many WRX owners and WRX wannabes put light-weight flywheels on their car for performance purposes. I am assuming they would experience similar loss of drivetrain kinetic energy?
 
Dual mass flywheels were brought in to make things smoother. Quite why I am not sure because my WRX never had one and has always been fine. Duak mass flywheels are prone to issues where they become noisy. I think your weights are out re the flywheels, as the super light flywheels are, from memory 4 kg's and are no good for road use. Always best when asking for advice to include the bit about when the problem first started in your initial post- makes things easier for all.

Anyway, you have options. You could return to the dual mass flywheel- why anyone would put a super light flywheel in an Outback is way beyond me. Or you could try a normal solid flywheel. But before all of that, see if the people who replaced the clutch can tell you what flywheel was in the car. They should have mentioned it if the flywheel was non standard.
 
to properely read a tps you need a scanner that reads live data stream,
engine off key on closed throttle it should read 0.45-0.48 max full throttle it should 100% you can also remove and using a ohm meter check for a glitch in it cant rember witch 2 termels to use just try tell you have movement move center very slowely watching reading reading shoud go up and down with out sckipping if reading jumps you may have a open on the winding in senser this is not uncomen check several times to varafie
:bananapartyhat::quitar::bananapartyhat::quitar::bananapartyhat:
 
ive had similar issues with my outback, im starting to suspect the intake air control or the boro sensor. because ive got OBD codes that say large vac leak but there is no way.
ive rebuilt this engine myself all new seals and gaskets so they cant be it.
possibly a crack in the intake manifold but doubtful. let me know what you find out.
rally knows his stuff.
 
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