Stumble with light throttle....

[Placemotorsports]

Been noticing lately that upon light throttle, say around 30-40 mph it wants to stumble or hesitate some. You can kinda feel it be a little jerky. If you give it more gas, it's fine. Just the part throttle is where it is acking funny. I checked the intake hose to make sure it was on tight and the sensor wasn't blocked. Any ideas? Mine is a 2011.

 

[Moxxy]

Could it be the fly-by-wire throttle response? See the Sprint Booster thread http://www.toyota-4runner.org/5th-gen-t4rs/97588-sprint-booster.html

 

[salong53]

Mine does the same thing. It has since I drove it off the lot. It seems like a very mild rhythmic surging under 10% or less acceleration, and at very low RPMs.

 

[Placemotorsports]

Mine does the same thing. It has since I drove it off the lot. It seems like a very mild rhythmic surging under 10% or less acceleration, and at very low RPMs.

I didn't notice it really until last week unless it has just got more prominent.

 

[Laurich]

Been noticing lately that upon light throttle, say around 30-40 mph it wants to stumble or hesitate some. You can kinda feel it be a little jerky. If you give it more gas, it's fine. Just the part throttle is where it is acking funny. I checked the intake hose to make sure it was on tight and the sensor wasn't blocked. Any ideas? Mine is a 2011.

<!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <wunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <wontGrowAutofit/> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--> Check out this post that adds to Quote from @diverscale with a graphic from @JeremyB
http://www.toyota-4runner.org/5th-gen-t4rs/204705-sports-mode-questions-2.html#post2112981
I’m wondering if this is the “flex-lock" that you’re noticing. This is assuming that you are in “D” and not in “S Mode” So for instance try the same thing (around 30-40 mph) in S-4 and see if you still feel it “stumble or hesitate some”. Hope this helps.

Visual representation of the above.

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[Saker]

Throttle position sensor?

 

[philsey]

What [MENTION=112949]Laurich[/MENTION] said. Drive around in S4, bet it goes away. I never drive in D in town, I've had that oddity since new.

 

[Placemotorsports]

Gonna give that a try. I was thinking fuel starvation or something.

 

[didiumus]

+1 For Sprint Booster

Check it out - and if you don't like it - you have a 30 day no questions asked warranty.

Scott