fuelspill

Ok heres the deal this has been happening since I bought car figured id try and start to figure out why. INFO on car.....All stock motor with no CAI, borla straight exhaust but also did it with stock exhaust, has no tune.

Idle is smooth as hell.
From a dead stop to drive with WOT no hesitation no stumble pulls hard.
Heres the issue when riding at speed limit 55-60ish and you go WOT it will drop to passing gear then all of a sudden give like a half second stumble or what feels like a miss then pull on hard. Its very brief and will do it everytime but only if it has to drop to passing gear never does it from a dead stop. Now you would think if it was a plug or plug wire or even a vaccum hose it would do this from a dead stop at WOT. But it only happens when you hit from around 60 or so. Any thoughts on this and has anyone else experienced this. I don't have any codes that would pertain to a miss fire.

Kevjud

I have had my 99 for three years and it does the same thing. I am interested in hearing from others if it is normal. It feels more like a delayed response from the transmission downshifting rather than an engine miss but not really sure.

fuelspill

Yeah im not sure either very odd though its really quick but noticeable. Apparently its not hurting anything because its not throwing any codes what so ever.

73Corvette

It sounds like it could be a normal hesitation, possibly from the throttle positioning signal and the ECU creating a bit of lag... I would ask ChuckCow... they may be able to "tune" that out of the equation...
I know his tunes REALLY wake up the auto cars and a lot of it has to do with shift points, timing, and throttle response...it is electronic/not a cable for you old school guys.
Just thinking out loud..sometimes isn't such a good thing.

Cow Booster

Since the introduction of "ELECTRONIC - DRIVE BY WIRE" throttle control, I've heard thousands of complaints from drivers

wishing that they had their "OLD THROTTLE CABLE AND SPRING" back. It's commonly accepted that the "NEW ELECTRONIC TROTTLE"

cars feel... FLAT, WEAK, UN-RESPONSIVE, or MUSHY. Some of you didn't notice...and MANY of you did. Many of you press the

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pressed that button several million times? Want to know how bad your existing throttle response is??? When you press the

gas pedal in your CORVETTE 50% or HALF WAY DOWN you're actually getting less than 15% of the throttle blade open. Worse

yet, when your taking it easy and only stepping on the throttle 1/4 or we'll say 25% down, you're actually not getting

much more than 3% of the engine's throttle blade open. This why ELECTRONIC THROTTLE cars don't feel like they have much

power. Fortunately, there is a FIX. Let us introduce you to the...
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installations will make all TRACTION CONTROL modes function the same, it's also possible to make one mode aggressive and

the other mode feel exactly like stock! ANY WAY YOU LIKE IT! CoW BOOSTER is NOT a piece of HARDWARE that gets plugged in.

It is a CUSTOM SOFTWARE SOLUTION that took 7 YEARS of DEVELOPMENT, RESEARCH, and TESTING to become a reality. It costs

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THROTTLE RESPONSE "RESOLUTION" is compromised giving you much less control than you really need to have. CoW BOOSTER can

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fuelspill

Yeah I know its a drive by wire system but im getting the miss after it actually goes into passing gear. So I go WOT it drops down and about a second or two after that I will get the (miss) or stumble. Its not a hesitation going to passing gear its after it gets there and its a really quick stumble then pulls hard all the way out.

0Chuck CoW

Call me and give me the details.

I'll do what I can to figure it out for you.

914-332-0049
Chuck CoW

fuelspill

Well today I passed a slower moving car but I was only doing about 40mph it went WOT dropped to passing gear and just went no stumble or miss. Really weird I will try to give you a call sat. Car is going to be tuned next week here local.