6spd hunting for rpm while in motion??

Gentleman, I am a happy owner of 2007 V6 Spd Tacoma. Warm or cold, same symptoms. No ground speed truck will idle to appropriate 750 rpm and will maintain correct idle speed. Allow vehicle to increase ground speed while in nuetral, about 12 mph engine rpm begins to fluctuate. Has gotten worse over time, nearly heading past 2000 rpm at some points. Definetly part of ecu recognizing truck moving forward. Have not tried moving reverse?? Any one unplugged speed sensor on trans??

 

that doesnt make sense. you have a manual transmission, its not like it has converter drive or lock up.. its just.. flywheel, clutch, transmission. if your rpms are going up while a gear is engaged... your clutch is not holding to the flywheel. i hear the throwout bearing is a weak point.. but any fluctuation in RPMs with the cluch out means its no workie.

hows it do past 12mph?

edit:

wait in neutral? i mean.. ive heard of the rev hang.. how long does it stay up at 2000? are you pressing in the clutch or putting the trans in neutral? and at higher speeds?

edit2: if youre pressing the pedal in, are you sure the clutch is completely disengaging? try putting the stick in neutral with the clutch out?

 

Ground Speed?

Can your Tacoma Fly?

How can you increase "Ground Speed" while in neutral? If you mean that you speed up in gear and then press the clutch the engine idle remains high for a second or two. That is normal.

 

x2 ^^ OP description makes no sense. Sounds like clutch is worn out and slipping if rpm is changing while in gear and driving.

 

Are you getting and grinding in the gears when shifting? Transmission may not disengaging completely. Check clutch your clutch fluids.

Bacon

 

I think all he's saying is if the vehicle isn't moving it idles normal. When the vehicle is in motion and it's out of gear the the rpms fluctuate.

When I had my 6 speed something similar would happen, but in slightly different situation. When getting off highway ramps after driving for a while, if I took it out of gear and left it in neutral, the engine rpm would go up and down between idle and 2000 rpms. Then it would calm down after a bit and act normal. It did that from new.

 

My 4 banger does this if Im coming down off of a long steep mountain grade.

 

Mine will do this too, though usually it holds about 1200RPM when in motion in neutral. Since there in no good reason to use "Mexican Overdrive", and enough very good reasons to not coast in neutral, its not a big deal.

If the throttle cuts in and out while driving in gear, it could well be a problem with the stop lamp switch - either adjustment or a faulty switch engaging the brake override on the drive-by-wire throttle.

 

Gotta love cryptic first posts with no follow up.

 

Sounds like maybe this is common then.

"Mexican Overdrive" LOL, I had to look that up.

 

Hmmm, my Mexican overdrive works great.

 

Oh, he made another post. His second post was a new thread calling all of TW children, and saying we had nothing intelligent to say.

http://www.tacomaworld.com/forum/2nd-gen-tacomas/319621-warned.html

 

I guess my post to his other posted did help, lol.

 

Kinda smells fishy...

 

He's a great troll...

 

I hope this isn't too much of an amateur question...

Just out of curiosity, what are some of these reasons? I can't say that I normally coast in neutral while driving, though I'll certainly drop it into neutral if I'm approaching stop and then just coast to a stop from time to time.

I understand it's not good to coast with the vehicle in gear and clutch depressed, but why in neutral?

 

-Higher fuel consumption when coasting in neutral compared to using engine braking where the ECU shuts off the injectors during deceleration (fuel cut-off).

-More brake wear from not using engine braking.

-Less control - say you saw a vehicle about to tee-bone you at the last second, and flooring it to get out of the way would avoid the accident - it won't work in neutral. A bit hypothetical I agree, but the gas pedal can be the safest way to avoid a collision in rare occasions.

What you describe won't cause any catastrophic damage for sure.

 

I've heard of at least two cases of a faulty or misadjusted stop lamp switch causing throttle trouble here on TW, and you're absolutely correct, no DTCs.

 

whats a dtc and stop lamp sw?

 

it makes so much more sense now! thanks!