Last post on Jul 18, 2007 at 10:32 AM
You are in the Toyota Sienna
What is this discussion about?
Toyota Sienna, Van
#3476 of 3687 Engine noise and clunking sound
Jan 18, 2006 (4:26 pm)
I have a 2003 Toyota Sienna LE, Symphony Edition with 43K miles. I have had a couple of minor annoying issues with it that I have seen mentioned on this board (squeaky stering wheel; a rattle on the driver side rear door; slow shifts when cold), but nothing major, until perhaps now.
A couple of months back I noticed an "extra noise" under the hood - sort of a thrashy, slurry sound. This is especially noticeable when the engine is cold and I am accelerating at a decent clip. It is harder to notice at higher speeds when the road and wind noise mask the sounds + the RPMs fluctuate less when on the gas. I have taken it to 2 different Toyota dealers and neither seems to be able to find anything wrong with it. At each dealer they claim to hear it - one technician even said it didn't sound that different from other Siennas he had driven. It doesn't sound like the buttery smooth Sienna I paid $25K for!
Just last night and again today I heard a new noise - last night there were two loud "clunk" sounds from under the hood. This happened under acceleration. Today at about 35 MPH and again under acceleration there was a single clunk sound.
The thrashy sound made me think that it could be an issue with the beginning of the exhaust system. The clunk sounds more like a universal joint/transmission issue. I am about ready to take it to a "good ole boy" mechanic, because I have little faith in the Toyota dealers.
Has anyone had a similar issue? Any advice? Thanks!
#3477 of 3687 Re: Engine noise and clunking sound [ned671]
Jan 19, 2006 (5:35 am)
dont worry about the engine noise when cold. cold metal is supposed to make a bigger noise than when warmed up.
the tranny is designed in a way to delay shifting till the collant warms up. so you have nothing to worry about. dont floor the van till the engine warms up.
if youre doing regular oil changes i wouldnt bother spending the extra bucks for synthetic. my 2 cents.
#3478 of 3687 2001 Sienna Fuel Consumption
Jan 19, 2006 (7:02 am)
My gas milage has decreased, and I do not know why!
I purchased a 2001 Sienna in Nov 05 (its now Jan 06). I had decent gas milage (aprox 22 mpg) at first. After getting the 60K tuneup, which includes spark plugs, new air filter, and I had the fuel injector cleaning service done. In addition, I have had 3 emisions sensors replaced, and the valves adjusted (under waranty).
After all the above was done, I expected BETTER fuel economy. Any suggestions?
#3479 of 3687 Re: 2001 Sienna Fuel Consumption [bowmanfamily]
Jan 20, 2006 (6:05 am)
its cold out there and usually fuel economy suffers. idling the car for extended periods.
#3480 of 3687 Re: Engine noise and clunking sound [ned671]
Jan 25, 2006 (1:35 pm)
We have a 2002 Sienna LE, non-power driver's side door with the same "rattle" when going over bumps. I even had the dealer install the rubber edging found on the passenger side power door in hopes of making the "dull, thumping" sound go away. No luck. I think the hinges that have the roller are spring loaded, always wondered if they become loose.
Has anyone had this issue resolved ?
Otherwise, at 45,000 miles we are very happy with Toyota quality.
#3481 of 3687 Re: Sludge/Resale-joj [hylyner]
Jan 27, 2006 (9:42 am)
You are 100% correct about the so-called sludge problem.
#3482 of 3687 2002 Sienna CE Code P0446
Feb 01, 2006 (9:10 am)
I have a 2002 Sienna CE with 25k mile, I have the check engine light on and went to AutoZone and they mentioned the code was realted to a Purge Valve. Has anyone had this problem? I was reading that a gas cap not being properly seated could be the cause or it could this part that controls the pressure in your gas tank. Any help is greatly appreciated.
#3483 of 3687 Re: Slow Fuel Refill [aclarke3]
Feb 01, 2006 (7:43 pm)
My 2002 Sienna Symphony is doing the same thing. The fueling nozzle just shuts off after about a gallon if the fuel is going in at a normal flow. It seems to be getting worse over the past 6 months. The repair shop could find nothing wrong, yet the problem continues. Did you have any luck with repairing the problem?
#3484 of 3687 Re: Slow Fuel Refill [osheakj]
Feb 02, 2006 (3:27 pm)
Have you taken it to the dealer?
#3485 of 3687 Re: Slow Fuel Refill [osheakj]
Feb 03, 2006 (7:44 pm)
not an expert, but that sounds like you are not removing air as the fuel enters the tank. there may be a fuel vent valve as part of the gas tank / fuel system. see if you can't find a diagram of these parts, and point this out to your tech.