Maybe I missed this or something about his rpm's, but what about just a problem with the throttle cable. Maybe it is just not really going to full throttle?

 

400 bucks, a night in jail, 80 hours community service and a year probation.. damn colorado is strict

 

Excellent thought, Gardiner! Considering the various bits of info we have gotten from the OP, it could easily be the Throttle Position Sensor adjustment, or the Throttle Cable adjustment. Either could cause the listed problems and either would fit the dribbles of info we now have.

Here's the section of the repair manual that covers the removal and installation of the throttle body, and the installation portion covers adjustment of those two. Just simple tools, no special test gear.

Good place to check.

Tom

 

Are you saying that the GPS showed 123 mph?
If not, what MPH did it show?
Variations in stock cars, or maybe even lowering, could add a few MPH.
What GPS do you have?

 

If my speedometer reads 70, my Tom Tom shows 64. I have the stock 15 wheels and tires on my xB.

 

It says Tom....never trust something that days Tom.....
......Well except maybe for Tomas....but he's got that freaky avatar that stares and blinks at you....
IM KIDDING TOMAS....please dont ban me.... (Im not grovelling....well not in public at least)

 

Me? Ban someone? Naw...

 

Mine will ride 3rd gear all the way up to the redline then shift into overdrive. If it's not going over 5K it's got to be something in the ECU or the VVT thats holding it back. Mine is going about 100 at redline out of overdrive so I'm thinking it's not trans related.

 

I've gone 127 before....

 

how bout you count as it shifts and see? its not hard to figure out a shift you can start there if it shift 4 times then you know if its tachin out and not shifting a 4th then you know. if it shifts 4 times then its not tranny related unless its shot

 

I hit 117 racing an infinity, more room to go faster, except on I-75 that day

 

It's been to about 105 on the dyno. I've not driven it that fast on the road.

 

hit 108 with overdrive off and couldnt pick up anymore speed

 

I have not looked at what my Garmin shows, but when my speedometer indicates 70, my ScanGuage likewise shows 64. I understand the speedometer is geared for the 185/65R15 tires that come on the bB in Japan and so indicates high with our 185/60R15 tires.
Scion's test data shows its top speed is a true 103, which might indicate as over 115 because of the way the speedometer is geared.

 

Think of how that affects gas mileage when you use the odometer to figure it out. You think you are getting 33mpg and maybe only getting 30mpg!

 

NO!

While the speedometer is DESIGNED to show an artificially high speed, but the odometer is about the same amount off IN THE OPPOSITE DIRECTION.

With the stock tires and wheels you are actually traveling FARTHER than the odometer indicates, and therefore getting slightly BETTER mileage than uncorrected calculations would indicate. (The usual error in the odometer with stock tires and wheels is about 3%, which would require multiplying the raw MPG figure by 1.03...)

(Covered many, many times here on ScionLife.)

Tom

 

So 34 becomes actual 35.02 mpgs. Cool

 

you should check for a crunched exhaust pipe / ca t / muffler; that would also limit your top end, too.

 

yea if ur O/D is messed up, you might as well put a hitch on ur car and tow things because that is the general purpose of O/D, to lower the amount gears or ratio for better hauling thats why you car will slow down quicker when accelerator is not being used. That sounds like when i switched my GMC Envoy into low 4 wheel drive mode, higher Rpm's but mostly torque is attained in that effect. wouldnt do over 45mph but 4 wheel hi did up to 80-85mph

 

Dunno what the speed limit is in Cali but in Joisey it's 55-65 on the Interstates and everybody does 70-80 in the 55 zones and 85-90 in the 65 zones in the left lane, at least on the Turnpike and 287.

My box has seen 100 so far. A good 45 MPH to go before matching what a bone stock 1987 Supra (non-turbo ) can do on the GSP. heh