I have a 2000 Tundra V8 and at idle it has very low RPMs. I know that it should have around 500, but I am getting in the 350-375 range(some times lower). This is when the AC compressor is off, as soon as the clutch engages it the RPMs jump back up to the 475-525 range. It does not feel like it is about to stall and has yet to. Now I am getting ready to do the timing belt/water pump/idler pulleys/cam seals job since I just broke 90k miles. My theory is that the timing belt might have stretched a bit over time and the idler pulleys are a little worn resulting in a low...er idle. If any one has anyother guess be my guest. Oh yea, cleaned the MAF and throttle body, new air filter, and new plugs. The only thing that is wrong are the stupid O2 sensors, but thay have gone before and this has never been like this.
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2000 Tundra Access Cab
Survived 5 tropical storms and 5 hurricanes
Survived a baseball sized hail storm
Hosted numerous tailgate parties
Water balloon refilling depot
Served as a portable pool
"I remember a Senator once asked me 'when we talk about CIA why we never use the word the in front of it.' And I asked him 'do you put the word the in front of God?'"
-Richard Hayes, The Good Shepherd
After my truck is warmed up, and I'm sitting at a light, mine idles extremely low too. It has done that since I bought it. Like you said, it doesn't even come close to dying, it just seems really low. I thought it was just normal.
It always seemed low, just around the first line on the RPM guage. Since I have gotten my scanguage II I can see the numbers better. So at the first line is around 500 RPMS, which I always seen as low to begin with, but it is the norm on these engines. About 2 months ago it started to drop into the mid/upper 400's for a moment. The lowest I have seen it go was 326. Now with the compressor off it is around 350, compressor on back to normal 450-500. I am assuming, like I said before, that it might be the timing belt stretched and the idlers not putting enough tension on the belt. Check out the engine forum about cleaning MAF there are tons of post there on how to do it. Thats where I read on how to do it.
__________________
2000 Tundra Access Cab
Survived 5 tropical storms and 5 hurricanes
Survived a baseball sized hail storm
Hosted numerous tailgate parties
Water balloon refilling depot
Served as a portable pool
"I remember a Senator once asked me 'when we talk about CIA why we never use the word the in front of it.' And I asked him 'do you put the word the in front of God?'"
-Richard Hayes, The Good Shepherd
I have a 2000 Tundra V8 and at idle it has very low RPMs. I know that it should have around 500, but I am getting in the 350-375 range(some times lower). This is when the AC compressor is off, as soon as the clutch engages it the RPMs jump back up to the 475-525 range. It does not feel like it is about to stall and has yet to. Now I am getting ready to do the timing belt/water pump/idler pulleys/cam seals job since I just broke 90k miles. My theory is that the timing belt might have stretched a bit over time and the idler pulleys are a little worn resulting in a low...er idle. If any one has anyother guess be my guest. Oh yea, cleaned the MAF and throttle body, new air filter, and new plugs. The only thing that is wrong are the stupid O2 sensors, but thay have gone before and this has never been like this.
Mostsleek,
I to had low idle. I to cleaned MAF, air filter change, throttle body clean. Mine turned out to be PCV rubber grommet letting air leak in and also 1 vacuum line not tight. Once I fixed these my Idle came back up and my brakes work way better.
Hope this helps. Let me know how it works out.
Ken
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JBA Headers, Gibson Muffler, Daystar Front Level Lift, CDT Kama Speakers, Elemental Designs 9.4 Amp, Eclipse CD2000 Head Unit.
Sorry for thread jacking but 2000ltdken i think your right. My pcv rubber grommet is probably poopie since ive never replaced it ever. Looks like a trip to autozone.
I to had low idle. I to cleaned MAF, air filter change, throttle body clean. Mine turned out to be PCV rubber grommet letting air leak in and also 1 vacuum line not tight. Once I fixed these my Idle came back up and my brakes work way better.
Hope this helps. Let me know how it works out.
Ken
Well I did just replace it, I will check it to make sure it is in all the way.
__________________
2000 Tundra Access Cab
Survived 5 tropical storms and 5 hurricanes
Survived a baseball sized hail storm
Hosted numerous tailgate parties
Water balloon refilling depot
Served as a portable pool
"I remember a Senator once asked me 'when we talk about CIA why we never use the word the in front of it.' And I asked him 'do you put the word the in front of God?'"
-Richard Hayes, The Good Shepherd
My 2000 Tundra was the exact same way. It seemed to idle the lowest after the engine warmed up and I stopped at the first traffic light I came to about 4 miles from my house. It always did it, never stalled and read somewhere it was normal.
My 2000 Tundra was the exact same way. It seemed to idle the lowest after the engine warmed up and I stopped at the first traffic light I came to about 4 miles from my house. It always did it, never stalled and read somewhere it was normal.
I do agree that the 4.7 engine idles low to begin with, around 500 RPMs for a V8. However, to have it run in the 300's, that is just...wow, never saw that before.
New question is where is the tack reading coming from...sensor. I know on other engines it will read it off the the alternator. I am assuming that this is the same, but this engine and its engineers who made it have some strage stuff going on, so anything is possible. I am wondering if the sensor is bad, or if it is reporting a higher RPM to the ECU then it is actually running at. Then the ECU is trying to lower the RPMs to "normal" RPMs. I hate computerized engines...I love the 2 454's in my boat so simple.
__________________
2000 Tundra Access Cab
Survived 5 tropical storms and 5 hurricanes
Survived a baseball sized hail storm
Hosted numerous tailgate parties
Water balloon refilling depot
Served as a portable pool
"I remember a Senator once asked me 'when we talk about CIA why we never use the word the in front of it.' And I asked him 'do you put the word the in front of God?'"
-Richard Hayes, The Good Shepherd
2 454's huh? dam thats alot of power i just never really understood why boats have big *** engines with blowers what i mean is.... im not sure small propeler (spelling) and big engine? i never would of thought a small boat needs so much power to go fast. sorry about changing the subject but ive always wonderd this.
2 454's huh? dam thats alot of power i just never really understood why boats have big *** engines with blowers what i mean is.... im not sure small propeler (spelling) and big engine? i never would of thought a small boat needs so much power to go fast. sorry about changing the subject but ive always wonderd this.
Water has a lot more friction then air...a lot more. The boat I have is not a speed boat by any means, it is a 34' Sea Ray Sundancer...cruiser boat. They need the bigger engines for torque. Try it, take your hand and move it through the air, little or no resistance, do the same in water and it become harder. Plus for a car/truck it only has about 1 to 1.5 square feet actually touching the ground at any given moment. The ground does provide friction, but only to the said area, where a boat just about half of it is in the water.
__________________
2000 Tundra Access Cab
Survived 5 tropical storms and 5 hurricanes
Survived a baseball sized hail storm
Hosted numerous tailgate parties
Water balloon refilling depot
Served as a portable pool
"I remember a Senator once asked me 'when we talk about CIA why we never use the word the in front of it.' And I asked him 'do you put the word the in front of God?'"
-Richard Hayes, The Good Shepherd
Well it seems to be the timeing belt, ect... I just got my truck back and it seems to be running better at idle. Like I said before with no compressor on it was dropping into the 300's, compressor on I was running just under 500 rpms. Now with the new belt it is running around 650 compressor OFF and around 750 compresser on. This seems to have fixed the problem...knock on wood. Next problem to tackle is the dam O2 sensors...again...sigh. Mabey I will get some new JBA headers since the price has dropped .
__________________
2000 Tundra Access Cab
Survived 5 tropical storms and 5 hurricanes
Survived a baseball sized hail storm
Hosted numerous tailgate parties
Water balloon refilling depot
Served as a portable pool
"I remember a Senator once asked me 'when we talk about CIA why we never use the word the in front of it.' And I asked him 'do you put the word the in front of God?'"
-Richard Hayes, The Good Shepherd
Well it seems to be the timeing belt, ect... I just got my truck back and it seems to be running better at idle. Like I said before with no compressor on it was dropping into the 300's, compressor on I was running just under 500 rpms. Now with the new belt it is running around 650 compressor OFF and around 750 compresser on. This seems to have fixed the problem...knock on wood. Next problem to tackle is the dam O2 sensors...again...sigh. Mabey I will get some new JBA headers since the price has dropped .
Who did your timing belt? And what did it cost you? I've been meaning to ask the local dealer what they would charge.
I most likely won't let the dealership touch it, and will take it to a small shop where my father-in-law lives... and probably pay half as much.
VERY low Rpm on idle
i just never really understood why boats have big *** engines with blowers what i mean is.... im not sure
small propeler (spelling) and big engine? i never would of thought a small boat needs so much power to go fast. sorry about changing the subject but ive always wonderd this.
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