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Part throttle-Full throttle HESITATION?

I'm not sure if I have a tranny problem, or a faulty TPS, but here's what happens:

Let's say I'm accelerating at a normal pace, I get to about 20-25 MPH, then I hit the gas HARD to about FULL-throttle, the engine/transmission will NOT respond at all for about 1-1.5 seconds, then all of a sudden it reacts and the RPM's shoot to like almost

6000!!! I don't think it's the tranny because if it was, I believe the RPM's would shoot up but the car would not accelerate?

Is this "normal"?? It's pretty annoying, but I kinda understand WHY it would happen, I mean, going from like 10%-90% throttle in 1 second is gonna force the engine/tranny to be a little behind the speed of your foot...right?

Could I have "dead spots" in my TPS, or could it be slow to increase voltage?

THANKS AGAIN!:)

Reply to
OldsFan4Ever
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Ok, let me get this right...

You floor it at 20 mph and the engine races up to 6000 rpm with a delay before you go anywhere???

Check your tranny fluid fast!!!!!

See if it is full and feel/smell what is in there.

If it feels gritty or smells like burnt toast, you are in trouble.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

OldsFan4Ever wrote:

Reply to
Mike Romain

My truck has similar behavior and had it since it was new. I remember test driving other trucks and cars that had similar behavior, but not as extreme as you describe. In my case, if I am driving 20-30ish and press the accellerator hard, it takes a second and shifts down to maybe first gear (tach jumps to near read line) and the truck takes off. The delay seems like a second or 2, but probably is less than 1. Very annoying so I don't do that... In 4 cyclinder rent cars, it is even more annoying as you have to push the throttle hard to get the thing to pull into trafic and it sounds like it's going to blow up. I figure since you don't go to WOT, the system is "watching" the tps to see where it is going so is making decisions along the way. As you depress and pass a certain point, it says downshift and as you keep depressing, it says, "oh, downshift again, we need more power". I'm guessing, since you are asking for a lot of power (throttle 90%) the system will downshift to an RPM range for max power which will be near red line (but not over red line).

I'm no mechanic, just sharing my observations.

OldsFan4Ever wrote:

Reply to
bobby

Well, you didn't say what kind of car this was, it might be normal..

Reply to
Robert Hancock

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