You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!
If you have any problems with the registration process or your account login, please contact contact us.
Engine & DrivetrainDiscussions about the engine and drivetrain of your vehicle.
This is a discussion thread titled "V6 High Rev on startup?", within the Engine & Drivetrain forum, part of the Technical & Vehicle Assistance Forums category.
I have an 03 Tundra V6 Reg Cab. It's got 2250 miles on it. Since new, the engine revs at about 2-2,500 Rpms on startup for about 30 seconds. Is this normal? It seems that the engine is "DRY" of oil and this is concerning.
I seen that charactistic in t100's when i was pricing used ones.
I wouldn't worry about it as for as running dry cause your oil pump is pumping as soon as your cranking truck over.
Solve some of your worries and start using synthetic oil .
especially at cold morning start up's.
My 03 v6 auto does it as well. Of all the things I really love about my Tundra, I have to say this is one thing I don't care for. I started another thread in the "v6" section about this some time ago because it concerned me so much. Their were a number of replies and everyone said much the same. I called around to a few service advisors and all say its in the programming and all is well. I switched out to mobil 1 at 1100 mi. for some assist.
This looks to be normal behavior for the 3.4, but I would really like to find a way to defeat this. It is most likely done to satisfy emissions on a cold engine, but I would rather not sacrifice possible engine longevity for start up emissions.
Any info on the V6 would be appreciated. It seems that this was not the best choice for me. (Power hungry and just found out that the diff between v8 and v6 on mpgs is only about 1).
I completely understand your concerns. My 1997 and 01 Rav 4's did the same thing and my new 2003 V8 Tundra starts at about 1800 rpm for the first 5 seconds and then settles to an acceptable 1400. We all know that a significant proportion of engine wear occurs at initial start-up, so this is VERY worrysome, especially for those of us planning to put MANY miles on our vehicles. Seems it would make more sense for the vehicle to start at fairly low RPM (e.g. 1200) and slowly increase to 1600 over the next 30 seconds.
I, too, was told the computer controls this aspect of start-up, but this is not acceptable. Can it be modified? Synthetic oil will help but does not address the root problem.
My 02 Tundra v6 automatic reg cab does this- and what bothers me moer than anything is how much it wants to take off just by idling. You must really keep your foot on the brake when stopped. Seems counterproductive- burn even more fuel when cold running. But it goes away shortly. I was concerned also because it doesn't seem proper to shift an auto trans with the rpm too high (lurches).
Is everybody experiencing this behavior in colder climates only?
Jeff
Mine has always done this since new, warm or cold. It takes about 30-45 seconds to disappear, and I usually let it idle through. It returns at every start, even when the engine is completely warm. I don't have a tach so I can't tell what the rpm level before and after, but the engine is really racing even without gas.
No, I do not think that it is temperature related since here in So. Cal. my 2004 V6 roars for the first 30 to 45 seconds. I really hate it because I would never intentionally race a dead cold engine. I have a 5 speed, so I can't even tone things down by putting it in drive.
Unless this is really necessary to get the 1st catalytic converter to light up faster, I bet that a reflash comes along eventually.
Quote:
Originally Posted by PXLpainter
Is everybody experiencing this behavior in colder climates only?
Sounds like a newer issue to me. I owned a 96 Taco 3.4L and it started up at around 1600 and settled in to 1000-1200 within 30 seconds for 100K. Our 97 4Runner has a 3.4L and starts at 1400. That would drive me nuts, thats the worst possible time to rev an engine.
[quote=Verndog]Sounds like a newer issue to me. I owned a 96 Taco 3.4L and it started up at around 1600 and settled in to 1000-1200 within 30 seconds for 100K. Our 97 4Runner has a 3.4L and starts at 1400. That would drive me nuts, thats the worst possible time to rev an engine.
I've got the 3.4L in my '95 T-100 and it too rev's up to 2200 rpm on a cold start when its sub 30° outside. Always has concerned me, but its got 113K miles and still doesn't use a drop of oil... so i'm not complaining too much.
Weird - I've never had this problem in 3 years. Only thing I notice is that it shifts way too soon in the first few minutes of driving, so I usually have to throw it down into 2nd to keep from getting rear-ended on the highway.
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.
V6 High Rev on startup?
Linear Mode
