CEL/SLIP repair impressions
 

ok ive put 20 miles on the car since they replaced my oil sending unit. cam gear exhaust side and somethign else that i cant tell from all the abreviations.

it seems to idle better, still feel a blip randomly but it wont move the rpms. However i have a new weird situation im not sure if its THIS car or still an issue.

Sitting at 600 solid rpms... i lightly press the gas pedal(take almost an INCH of pedal movement) and the rpms first DROP to about 400 then go up...
I have never had a car go DOWN at first throttle before. I dont mean im stomping the pedal and flooding it.. i mean a light tap..
normal ? paranoid ? suggestions?

Thanks.

Not normal. Take it back to the dealer and have them look at it.

Mine doesn't do that. Seems abnormal.

vacuum leak

+1

Crap I think my car was doing that a bit.

I killed it at a few lights due to giving it a blip with little corresponding rpm blip. I thought I was just being an idiot.

So typical idle speed is 600? Mine seems to be 700.

Just curious.

Mine is 600.

I've put about 100 miles since my repair and my car does this as well. I actually thought the idle issue was coming back, but it is exactly how you described. This is very interesting...

What gmoohker said. Vacuum leak or some programming in the ECU but I doubt that.

I noticed this today. At first I thought maybe I wasn't giving enough gas as i was letting out the clutch - like it was engaging before I was applying throttle and therefore rpms were dropping. But then I tried replicating with car in neutral - rpms dropped slightly before increasing when applying gas. Very odd, and the engine didn't seem happy. Car was not fully up to temp. Cruised a few miles more, and couldn't replicate it after that.

So not thrilled about that development... Otherwise, over 1000 miles and she's been solid...so allow me to jinx myself.

I have an interesting observation.

My car did this today just now. Idle dips a little then goes up when I tap on the gas. Car has 5xx miles, runs great, never any hesitation, never been in the shop for anything.

VIN build is 6030xx... Does my car have an updated ECU or something?

Mact,
http://www.ft86club.com/forums/showthread.php?t=15577

I'm aware of that thread, but that's only for people who have had their cars repaired due to the CEL and slip light coming on. My car has not experienced this so far. The only thing I have experienced on my car is the characteristics of the throttle similar to some people with repaired cars, which is why I ask, does my car contain some or all parts used in the repair action of affected cars?

But it's not just the mainstream idle dip issue, which I haven't really had happen much or at all - that being, the rpm's dip when idling, on it's own, randomly.

The issue outlined above is that the idle dips slightly upon giving the car some gas. Apply throttle --> RPM dips initially --> RPM then picks up as normal. I've noticed mine only seems to do this when the engine isn't fully warmed up. After it's fully warm I can't replicate.

After re-reading my post I should have more clear.. Sorry. Yes I meant to describe what you just did. I was in the parking garage, and tapped the gas slightly. The rpm's dipped a little bit then went up. I have no idle issue whatsoever. Car was more or less warm.

Update
 

Update on my case:
Dealer called me today after of 3 days of them working on my car they told me the scion tech guy came in today and yesterday from Kansas to reflash my ecu they put in 15-20 miles for test drive ive driven it for 25 miles now and the cars feel like it was when i first bought it the only difference ive seen was the steering, it felt like its more heavier or stiffer for i dont know what reason and how it happened after the ecu reflash but car runs better now on the positive side transmission feels solid (had transmission problem) and the throttle respons a bit more responsive the engine sounds a little bit louder than before. Then scion case manager called me after that i told them about the steering they asked me if i test drove the car with the tech guys which i didnt do but for now i just want to have fun with this car even if the steering is somewhat heavier feel to it im tired of going to dealership back and forth for faults. Btw no compensation was given.

OP put mine repaired (for now)

Not necessarily. If he had the same issue as I did, then it's the VVT sensor/cam gear issue failing to retard or advance the timing properly to adjust spark. Definitely not normal and I'd send the car back immediately.