Camry Hesitiation at 2500rpm

[terrynham]

Hi,
Ive notice with my 94 Camry (4-cyl auto). That when I put my foot down from a standing start. The Rpm will raise normally to about 2,500rpm and then sit there for a second or two and then rapidly increase to where it should normally be at that throttle position....

Once, I put my foot flat to the floor and it hesitated at 2,500rpm and when it continued from there it almost redlined

would anyone know what could be wrong?

thanks.

[SmokingTires]

Same happens on my car. Seems like a standard hesitation. Then the actual torque of the engine kicks in. I don't really know how else to explain it. It doesn't ever seem like a real big problem.

[cam2Xrunner]

When was the last time you had the fuel filter changed? That can cause a hesitation. Also could be something wrong with the trans.

[Stealth]

perhaps cause it has to drop down a gear... (car accelerates faster in lower gear but uses more gas)

[']['R][) camry]

My car does that at 1,750RPM... it only does it on WOT in 1st geer from a stop.. it still does it and I got a new fuel filter 3,000KM ago... I guess it just does that..

[Stealth]

you can really feel when the tranny is switching gears when you're heavy on the gas... its really smooth when you're not accerating hard though.

[SmokingTires]

^
Best reasoning right there. Your tranny drops down a gear to give you accel you need. When you drive normal (not heavy on the gas), your autos will shift around 3,000RPM. It gices you the best milage and puts the least strain on your engine. But when you floor it, it needs to drop gear to accel. If you were in fourth and floored ( in say a manual) it would take forever to get up to speed.

Good explination Stealth

[calvic]

Originally posted by SmokingTiresV6
Same happens on my car. Seems like a standard hesitation. Then the actual torque of the engine kicks in. I don't really know how else to explain it. It doesn't ever seem like a real big problem.

This is your best answer. I think all the 4 cyls come up on the cam right in this rpm. Mine does anyway

jj

[Stealth]

wow you people have no understand whatsoever of how an automatic transmission works do you?

in a way its almost like a manual... if you want to accelerate faster, drop down and gear and gas it up

even the v6s will do the same thing if you floor it.

[calvic]

Maybe its you who doesn't understand auto trans Pal !
If you floor it from a standing start it sure a hell wont back shift at 2500 rpm, if it does you got serious trans problems.

JJ

[terrynham]

I dont think it is anything wrong with the fuel filter or anything like that, but I am thinking on getting the throttle body cleaned if thats any help

I took a closer look at when it hesitates at 2500rpm and it seems like it is changing from first to second at that point......
but if i floor it, should the car realise that and shift at a higher rpm?

[']['R][) camry]

Originally posted by calvic
Maybe its you who doesn't understand auto trans Pal !
If you floor it from a standing start it sure a hell wont back shift at 2500 rpm, if it does you got serious trans problems.

JJ

Exactly.. no one read it or what?

from a standing start.. it is in 1st and never leaves 1st till 6,250RPM (if floored...)

[SmokingTires]

It's due to lack of low end torque and a number of other factors I can't explain. It's something that happens on all Camrys. My V6 does it too. It's normal, so don't worry about it man. Theres nothing wrong with your car.

But it doesn't just happen at 2,500 RPM... For example, if you are at highway speed around 70mph (I know, a little over) and you put it down to pass someone, your car may be at 3,500 or 4,000RPM. Your car will still hesitate, but at that point, it is droping gears. It has to. You could never get that kind of accel while in 4th gear. The hesitation is to allow your transmission time to clucth and shift smoothly.

terrynham: Your car should shift between 2,500RPM and 3,000RPM during standard accel. And yes, when you floor it, your transmission will get the best performance out of what you are giving it and it will shift higher. My V6 will shift at around 6,000RPM when put to the floor. Your I4 may be a little different. But yes, the shift points will change.

[terrynham]

the shift from 1st to 2nd, as you say in normal accel is around 2500rpm, but if i floor it, should the 1st to 2nd shift point be higher? because thats the problem I have.....it doesnt seem to want to shift from 1st to 2nd for anything over 2500rpm and thus hesitates, and then shifts into 2nd where the rpm raises dramatically.

obviously like ']['R][) camry, said i dont expect it to shift around 6,000rpm , but shouldnt it shift at least about 3,000-3,500rpm?

[SmokingTires]

I don't think it is shifting up to second. You wouldn't get as good of accel in 2nd. At least not what you need to come off the line. I think that's just your engines reaction.

Try this: start from a stand still in an area that you won't have to worry about cops. Accel at a little higher pace than normal, but not putting it to the floor. You will see each up-shift. Each time your car up-shifts, you will see your RPM drop to around 2,750 (give or take). Do this till your up around 70mph or so (maybe even more just to make sure). Watch and make sure that your car shifts gears three times ( 1st-2nd, 2nd-3rd,3rd-4th).
If you car shifts all three times, your fine. You engine just hesitates like most stock engines. If you only shift two times, than your car might be shifting wrong. Do this a few times to make sure.

Make sure it shifts smoothly too. (Smooth may include a jerk, but that comes with quick accel). Just make sure your car isn't dropping the shift. If it is, you will feel a large power loss when your shifting, and it will feel like your car fell out of gear. If that happens, let of the gas to let the clutch engage.