Sign In Join 

You are here: [F] Forums / SUVs / Toyota RAV4 / Toyota RAV4 2006



Toyota RAV4 2006

4666 messages,  Last post on Nov 26, 2009 at 4:56 PM

You are in the Toyota RAV4 Forum. Your Hosts are steve_ & tidester

What is this discussion about? Toyota RAV4, SUV


Messages Page 462 of 467
1
...
459
460
461
462
463
464
465
...
467
Prev
Next
Last
Go To Msg #
Search This Discussion

#4607 of 4666
Re: 2006 4cyl Acceleration Issues - still an issue? [mtwebster] by mark19
Aug 02, 2007 (7:00 pm)
Reply

Replying to: mtwebster (Aug 02, 2007 3:28 pm)

A friend of mine has that acceleration lag. They found a TSB (service bulletin) for the transmission, and yes it fixed this lag. Even though the TSB was for the transmission if you read the bulletin it went on to describe the engine and emissions system. Nice way of Toyota to hide that they were really masking the emissions of the 4 cyl engine through the engine computer slowing the rate of fuel to the engine, and the lag! Don't let the tsb title fool you, it'll say transmission but it's really for the engine computer as well. Also my friend's fuel economy increased about 3-4mpg as well. They do have the 4cyl engine (rav4 fwd, 2006) I will have to search for the tsb number or ask them if they still have a copy of it if you need a number. A dealer should be able to find this for you as well, but sounds like your dealer is just making up excuses which is a joke! Might want to find yourself a dealer who doesn't lie to you.
 
Hope that helps. It does solve the acceleration lag, so it's a computer software issue.
#4608 of 4666
Re: 2006 4cyl Acceleration Issues - still an issue? [mark19] by ateixeira
Aug 03, 2007 (6:44 am)
Reply

Replying to: mark19 (Aug 02, 2007 7:00 pm)

I wonder if it's a bypass in the vacuum lines, like you can do with the V6s in the Sienna (both 3.3l and 3.5l). I'm sure the mod would work on a V6 RAV4, too.
 
Details here:
 
http://www.angelfire.com/ky3/gabby/intake_mod.htm
 
Disclaimer: my 3.5l V6 Sienna wasn't hesitating, but I did this anyway, and my mileage has improved.
#4609 of 4666
Re: 2006 4cyl Acceleration Issues - still an issue? [ateixeira] by cbmorton
Aug 06, 2007 (3:15 pm)
Reply

Replying to: ateixeira (Aug 03, 2007 6:44 am)

Any hint on how this mod can be done on the 2GR-FE, the underhood configuration being somewhat different than as shown in the pictures at that site? I'm loath to start disconnecting vacuum hoses without being sure I'm doing it to the right ones. I'm not having issues with my engine either but I'm always interested in better mileage.
#4610 of 4666
Re: 2006 4cyl Acceleration Issues - still an issue? [cbmorton] by mark19
Aug 06, 2007 (6:02 pm)
Reply

Replying to: cbmorton (Aug 06, 2007 3:15 pm)

didn't you read my message? i didn't mention anything about disconnecting vacuum lines, and there is only one anyway it's for the emissions systems. So I don't see how disconnecting anything for the emissions system is going to help your fuel economy. Most likely it'll hurt your engine in the long term.
 
the update I was mentioning was not for the v-6 but for the 4cyl. And yes updating the software inside the computer (ecu, brain) will definitely help fuel economy.
#4612 of 4666
Re: 2006 4cyl Acceleration Issues - still an issue? [cbmorton] by ateixeira
Aug 07, 2007 (7:17 am)
Reply

Replying to: cbmorton (Aug 06, 2007 3:15 pm)

2GR-FE with the same mod:
 
http://www.siennaclub.org/forum/index.php?showtopic=15867&st=0&#entry122284
#4613 of 4666
Re: 2006 4cyl Acceleration Issues - still an issue? [cbmorton] by cbmorton
Aug 07, 2007 (7:23 am)
Reply

Replying to: cbmorton (Aug 06, 2007 3:15 pm)

Thanks - once I got the service manual out it's obvious where the vacuum hoses go. However, the manual makes the two-stage intake sound desirable, and indicates that the control valve in the intake manifold is open most of the time on the 2GR-FE anyway - so that may be different than the way the 3.3 V6 worked:
 
The ACIS is realized by using a bulkhead to divide the intake manifold into 2 stages, with an intake air control valve in the bulkhead being opened and closed to vary the effective length of the intake manifold in accordance with the engine speed and throttle valve opening angle. This increases the power output in all ranges from low to high speed.
• When the intake control valve closes:
While the engine is running at medium speed under high load, the ECM controls the actuator to close the control valve. As a result, the effective length of the intake manifold is lengthened and the intake efficiency, in the medium speed range, is improved due to the dynamic effect of the intake air, thereby increasing power output.
• When the intake control valve opens:
Under any condition except when the engine is running at medium speed under high load, the ECM controls the actuator to open the control valve. When the control valve is open, the effective length of the intake air chamber is shortened and peak intake efficiency is shifted to the low to high engine speed range, thus providing greater output at low to high engine speeds.
#4614 of 4666
Re: 2006 4cyl Acceleration Issues - still an issue? [cbmorton] by ateixeira
Aug 07, 2007 (7:32 am)
Reply

Replying to: cbmorton (Aug 07, 2007 7:23 am)

The theory is that it actually takes a second or two for that 2nd path to open when you floor the throttle, and this is the reason for the hesitation some people report.
 
I dunno, my V6 was quick before, quick now, no hesitation before or after. My mileage did improve but it was breaking in and that might have happened anyway.
 
For people reporting hesitation, though, it's something worth considering, IMO, if their engine has a similar intake.
#4615 of 4666
Worries? by 01taurussel
Oct 01, 2007 (5:53 pm)
Reply
Hi Folks,
taking a look at CR-V and RAV4. I am concerned about the engine revving and not moving the car forward. My folks 03 Explorer is the SLOWEST transmission to shift - its delay is very pronounced. I dont think its unsafe since the car is slow even when you floor it.
Is this on all 4-cyl models? Just some? What is the reasons for the hesisation? I see this happens with Camry's and Solaras as well.
 I just want a safe, reliable auto for my fiance. IF the tranny is like the explorer's - just lazy, I don't care I am used to Fords
#4616 of 4666
Re: Worries? [01taurussel] by raviola4
Oct 02, 2007 (3:21 am)
Reply

Replying to: 01taurussel (Oct 01, 2007 5:53 pm)

I assume Toyota has the problem fixed now, but can't confirm. Mine is an early model 4 cyl. 06 Rav. There is a TSB out there that covers this issue which i've previously reported as a serious flaw. Since having it done a few months ago, car has run flawlessly, good pick up, no hesitation and mileage improved to boot. Believe only with 4 cyl. and again, i'd think they fixed the problem. Knowing this, test drive a 4 cyl. I'm sure the 6 will rocket you forward, but mine does well, consistently 23-24 around local and 26-28 (even 30 on one trip)highway.

Messages Page 462 of 467
1
...
459
460
461
462
463
464
465
...
467
Prev
Next
Last
Go To Msg #
Search This Discussion
To POST a message, please Sign In.

You are here: [F] Forums / SUVs / Toyota RAV4 / Toyota RAV4 2006

New? Join Now!

Forum Tools

Please sign in.
Email Address:

Password:

Forgot Password?

Search Forums

Enter Keyword(s)

Advanced Search

Browse by Vehicle



View All Vehicles
Advertisement
Learn More

2011 Toyota RAV4

2011 Toyota RAV4 Limited 4dr SUV 4WD

More Pictures

DoMore

Ask the Community
See What People Are Asking

Browse by Board

Browse by Topic


View All Topics

Today's Chats

Advertisement