V6 High Rev on startup?

[clyderiver77]

I had a 1995 Tacoma 3.4 L that also raced upon start up. If I put the clutch in and let it out a few times it would drop by a few hundred rpms everytime for a few times, but took quite a few minutes to idle at a normal rate. I sold it a month ago with 170k on it and it still ran great and didn't use oil. I just bought a used 2000 4runner, I hope it won't do this.

I posted a bunch of questions of my own here in TS, does anyone know when I may get answers to some of them? It has been 2 days so far.

Thanks!

[tackleberry625]

Originally Posted by sweetz

My Tundra does that revving at start whether warm or cold. It also shifts very quickly if you don't floor it right off the bat. I hate that. Keeping it in 2nd is about the only way around it that I have found.

I have the same prob on my 02 v6. I just let mine warm up for a few mins prior to driving it. No biggie. I alway use royal purple 5w-30 since 2500 miles.

[nirion]

Nearly every 3.4 V6 I have driven (T100s, 4Runners, and Tacomas) have that distinctive startup rev. I don't recall it on the 3.0 V6s in the Camrys or Avalons though.

[tackleberry625]

Originally Posted by nirion

Nearly every 3.4 V6 I have driven (T100s, 4Runners, and Tacomas) have that distinctive startup rev. I don't recall it on the 3.0 V6s in the Camrys or Avalons though.

it may have the high rev to help it warm up faster.

[5 Speed]

I think the noise you are hearing is the cold fan clutch. If you rev the engine when it is warm to the RPM's you are talking about at start up you will just hear a little engine noise, when the engine is cold the fluid in the fan clutch makes the fan make most of the noise. It is a pain when camping and trying to leave before sunrise

[tackleberry625]

Originally Posted by 5 Speed

I think the noise you are hearing is the cold fan clutch. If you rev the engine when it is warm to the RPM's you are talking about at start up you will just hear a little engine noise, when the engine is cold the fluid in the fan clutch makes the fan make most of the noise. It is a pain when camping and trying to leave before sunrise

ya, mne sounds like a jet if i do that, lol

[Slowroll90]

when mine is cold during normal acceleration, it shifts late and lets it rev fairly higher than it would when warmed up at the same throttle pressure.

[theyotaguy]

On most Toyotas,the oil pressure light is off or the guage has at least a slight after the engine has been cranking for a couple seconds,so there is oil pressure there.The other thing to think about is that if the engine is turning 1800-2000 rpm's,so is the oil pump,so all parts of the engine should get oil faster as well.Somebody also mentioned the noise from the cooling fan-once the fan clutch has been spinning for a minute or so,the fan speed (and the noise) drops considerably,even though the engine may be still running at 1800-2000 rpm.It just makes it sound like it's racing alot more than it really is.All of these are normal conditions,and I see no reason to worry about premature wear.I have seen some very high mileage V-6 Toyotas that still have the high rpm's when cold that run just great.I would not waste a minute of time worrying about it.

[v6er]

wow cant believe nobody has posted the reason for this yet...the high rev on start up and late shifting are all for rapid warm up of the engine and cat converter. definetly nothing to worry about, mine has always done the same.