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TacomaGeneral discussion forum for the 2005 and later Toyota Tacoma.
This is a discussion thread titled "Time to chime in .. Tacoma "Lurching" Update", within the Tacoma forum, part of the Truck Forums category.
Ok guys.. time to chime in.. 32 complaints out of almost 400,000 happy Tacoma owners and this guy wants to file more lawsuits against Toyota. How many out there think this guy is full of it or just doesn't understand how the truck works?
To be "fair" there have been a few on the forums that have said when the A/C comes on if you don't have your foot firmly on the brake that your truck may "lurch" forward a bit. Easily corrected... put the foot on the brake.
I don't think he's full of it, or he doesn't know how it works. I think he's just documenting a known problem. My truck DID this when it was new, and did it for a long time. It has gotten better, but it definately still does it.....not sure what your trying to say. I'm not sure what their report said, but either way, my truck does this, as did my friends '06 Pre-Runner. I should add, this has nothing to do with the a/c, its the 2nd to 1st downshift once you have been stopped for a few seconds.
This guy has a stick shift which is even more bizzare. His "problem" also started over 25000 miles and a year later than his initial purchase. If you look at the reports filed with the governement. Purchase was made May 2006 but not reported to happen until late 2007 / early 2008.
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Tacoma V6 Auto 4x4 Double Cab 128" Delivered 4/23/05
White
TRD Off-Road Package #2 (OG)
Vehicle Stability Control w/Downhill Assist (VE)
Side Curtain Airbag (GY)
Daytime Running Lights (DL)
TRD CAT Back Exhaust, Bed Mat, Husky Floor Mats, Wildcat Flash Nerf Bars, Prodigy Brake Controller, In Dash cell phone mount, Cargo Bars w/Thule Ski & Bike Attachments, Toyo Open Country A/T Tires (Stock Size)
I have the same thing happen with my truck. The only way I can keep this from happening is to keep the break fully pressed. The problem is that the natural thing to do is to let up on the brake a little when you are completely stopped, and this has been a hard habbit to break.
You guys can't comment on his problem accurately until you watch the interview. I too live in the Sacramento viewing area and watched the initial interview. His problems are completely unrelated to the "lurching" problems others complain about. First of all, he said he regretted buying the truck because it just wasn't as comfortable as he thought it was going to be and tried to get Toyota to buy it back. So, see where this is going already? Then he described in the interview how his truck has a lurching problem (Yes he has a stick shift). His problem (as he described it) is when decelerating off the freeway the truck seems to want to keep going when stepping on the brake, and you can see the RPMs don't decrease very much when you push in the clutch. Sound familiar? It's part of the emissions!
It's people like him that are muddying the waters of the true lurching issues that others have. End of Story!
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"It's not what you know. It's knowing where to find the answer."
'05 4x4 DC LB SR5 Tow Pkg BFG All-Terrain T/A KO, Leer Tonneau, Westin Platinum Nerf Bars, Fog Light Mod, Orig. Owner 12/3/04
This guy has a stick shift which is even more bizzare. His "problem" also started over 25000 miles and a year later than his initial purchase. If you look at the reports filed with the governement. Purchase was made May 2006 but not reported to happen until late 2007 / early 2008.
This is physically IMPOSSIBLE to have happen if the clutch is not engaged. That person is totally jumping on the band wagon.
The reason a truck "lurches" is not the problem of the truck, but the driver not fully depressing the brake pedal at a complete stop. With the truck at 500-600RPM in when in drive, the a/c compressor kicking on will jump the RPM to about 1200-1300RPM. A significant difference. What happens with more RPM in engines? Ah right, MORE TORQUE!!
I like the original reported stories about Tacoma's just speeding off on the highway without the driver applying their foot to the accelerator. Right so, you forget what that big green N on the gear selector means? I could understand how you would panic, but come on COMMON SENSE! Whenever the rear tires break traction on my 6spd, the foot goes on the clutch pedal to neutral. I don't doubt the trucks could have faulty problems with the DBW system and the throttle bodies, but there is an increasing number of bad drivers behind the wheels of cars these days.
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"You can't be afraid to reverse engineer something to see how it works." -Me
Last edited by The Phoenix; 02-28-2008 at 09:59 PM.
I should add, this has nothing to do with the a/c, its the 2nd to 1st downshift once you have been stopped for a few seconds.
If that's true, then why does mine do it when the A/C is OFF? It has nothing to do with a "2nd to 1st downshift" at all. I used to think it was a torque converter issue but the fact remains, mine (and many others) does not "lurch" when the A/C is off.
BTW, there are certain HVAC functions that automatically turn on the A/C so, even if you think it's off, it may be on.
__________________ Eric
2007 Toyota Tacoma PreRunner SR5 V6 DC/SB
Last edited by WilsonTheDog; 02-28-2008 at 10:37 PM.
I retract my previous statement....I didn't realize the guy is crazy.
My bad, lol.
Yep, he just didn't like his truck and is jumping on the band wagon to try and claim there's a problem in the hopes that Toyota will buy it back. There's a reason why he lost his arbitration case. We do have numerous members here who have had the real lurching problem. It wouldn't surprise me at all to see it happen with a drive-by-wire system. After all, we can't all claim that every computer built never has a defect that causes it to do unexpected things.
__________________
"It's not what you know. It's knowing where to find the answer."
'05 4x4 DC LB SR5 Tow Pkg BFG All-Terrain T/A KO, Leer Tonneau, Westin Platinum Nerf Bars, Fog Light Mod, Orig. Owner 12/3/04
With the truck at 500-600RPM in when in drive, the a/c compressor kicking on will jump the RPM to about 1200-1300RPM.
A 600 RPM jump because the AC compressor kicked in? That sounds really excessive. In my '93 pickup the RPM jump is minor and can be manually adjusted with a screw. Is the RPM jump non-adjustable (electronically controlled by computer) on the late model Tacomas?
A 600 RPM jump because the AC compressor kicked in? That sounds really excessive. In my '93 pickup the RPM jump is minor and can be manually adjusted with a screw. Is the RPM jump non-adjustable (electronically controlled by computer) on the late model Tacomas?
There is no way to adjust anything on these trucks. Your 93 is much different.
__________________
"You can't be afraid to reverse engineer something to see how it works." -Me
A 600 RPM jump because the AC compressor kicked in? That sounds really excessive. In my '93 pickup the RPM jump is minor and can be manually adjusted with a screw. Is the RPM jump non-adjustable (electronically controlled by computer) on the late model Tacomas?
You have to remember to that the engine is a lot bigger and more powerfull on the 05+ models as well the compressor for the A/C is bigger. I also have the tow package which means a bigger alternator. All in all.. the engine has more stuff to power under the hood and acts accordingly with the increase in RPM.
__________________
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Tacoma V6 Auto 4x4 Double Cab 128" Delivered 4/23/05
White
TRD Off-Road Package #2 (OG)
Vehicle Stability Control w/Downhill Assist (VE)
Side Curtain Airbag (GY)
Daytime Running Lights (DL)
TRD CAT Back Exhaust, Bed Mat, Husky Floor Mats, Wildcat Flash Nerf Bars, Prodigy Brake Controller, In Dash cell phone mount, Cargo Bars w/Thule Ski & Bike Attachments, Toyo Open Country A/T Tires (Stock Size)
A 600 RPM jump because the AC compressor kicked in? That sounds really excessive. In my '93 pickup the RPM jump is minor and can be manually adjusted with a screw. Is the RPM jump non-adjustable (electronically controlled by computer) on the late model Tacomas?
I agree, this sounds like a problem right there. Tow package doesn't make a difference on mine. My compressor only increases the RPM by 100 - 200. That's all!
__________________
"It's not what you know. It's knowing where to find the answer."
'05 4x4 DC LB SR5 Tow Pkg BFG All-Terrain T/A KO, Leer Tonneau, Westin Platinum Nerf Bars, Fog Light Mod, Orig. Owner 12/3/04
I was thinking wrongly before. Normal idle is 750RPM, and the compressor kicking in makes it jump to 1100-1200. From in drive, it would only reach maybe 800-900. That's still enough RPM jump to make the truck want to move forward.
__________________
"You can't be afraid to reverse engineer something to see how it works." -Me
I was thinking wrongly before. Normal idle is 750RPM, and the compressor kicking in makes it jump to 1100-1200. From in drive, it would only reach maybe 800-900. That's still enough RPM jump to make the truck want to move forward.
Yes, that's what I experience in RPM increase when in Drive. However, mine doesn't push any differently than every other toyota we've owned (6+).
__________________
"It's not what you know. It's knowing where to find the answer."
'05 4x4 DC LB SR5 Tow Pkg BFG All-Terrain T/A KO, Leer Tonneau, Westin Platinum Nerf Bars, Fog Light Mod, Orig. Owner 12/3/04
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Time to chime in .. Tacoma "Lurching" Update
2007 Tacoma TRD
Linear Mode
