..it is a simple machine, why be paranoid...http://www.truedelta.com/Scion-FR-S/reliability-1096

...like most Subies and Toyotas there aren't any major problems..

Like @Tcoat mentioned, my car had a dead spot right off of idle, particularly when the car was moving slowly and then throttle was reapplied. This was most noticeable when coasting through low-speed corners, the revs would drop to under 2,000 rpms, you add throttle on corner exit, and then the engine seemed to fall into a hole before it would respond with an abrupt hit. Initially I thought it was the torque dip, but it wasn't that the car was down on power at the time, it was that the throttle was depressed and the car was absolutely dead...until it wasn't. Throttle response was sharp at all other rpms and the car ran perfectly at speed. My car did this stock and with a Cosworth drop-in filter.

The throttle realy should not have dead spot or be laggy.

unless theirs somthing wrong or

you just reset or reflashed ecu
the maf scaling is off due aftermarket intake or you have air leak
you have exhaust leak upsetting 02sensor readings
you running rearly crap fuel and its getting a lot of knock

you should be able to go heavy of full throttle at any rpm and its should not bog, it may not pull very well at low rpm but should not die

What happened that made it work fine ?


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My experience with FR-S that had intake / exhaust done was that the low revs felt more vague and sloppy, at least at clutch engagement. Couldn't tell by feel or sound where the lower revs were (this was a muffler delete, so all I could hear was mostly drone).

Your symptom sounds like the ecu is still learning, have you pulled the battery recently? Also to add what others are saying, your car won't work right with that intake without a tune.

Of course they'll find something. I've even read lately that all the '12-'16 models were designed in a rush ... What else we'll hear ...

I assume it was the EcuTek Pro ECU and Delicious Tuning ECU reflash, although an ACE 4-2-1 Type-A 350 equal length header, Motiv catted front pipe, and Blitz Nür Spec stainless steel exhaust were installed at the same time.

Here is an update to this thread and sorry for bringing it back up.

Today I got in the car, warmed it up and now the dead space has pretty much all vanished. There is the tinyest (and I mean like 0.3 inch) play still in the throttle but the response now is pretty damn good. I did drive 300kms the day before so maybe it did need to relearn everything as I did install a subwoofer. First gear does still feel someone sloppy though from 1 k to 3 k rpm but it has gotten a lot better and I think a tune would probably take care of that considering I have injen intake. I wonder if open flash tab from vishnu would cure that or would I have to get it ecutek tuned


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Yes sir, I have that on my vehicle as well. DBW has it's ups and downs. I take that as a safety precaution. I'd worry if it were my brake though. Mine has 1/10th of that play but not my accelerator.

Intake is more than likely the cause, too much air for the ECU. I have OFT, and the only thing you have to do for a new intake is scale the MAF, which can be done by either datalogging and perfecting it yourself, or by using a pre made chart available on the forums.

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