Hesitation under acceleration from stop - Page 2 - Toyota 4Runner Forum

T4topher · 03-06-2021, 03:25 PM

Someone on Facebook is recommending throttle cable/kickdown cable adjustment or transmission shift solenoid. I’ll try to get the cable adjusted and see what happens if no change then I’ll check out the solenoids, if anyone has a part number that would help tremendously..

FD7683 · 03-06-2021, 04:23 PM

Quote:

Originally Posted by T4topher

Someone on Facebook is recommending throttle cable/kickdown cable adjustment or transmission shift solenoid. I’ll try to get the cable adjusted and see what happens if no change then I’ll check out the solenoids, if anyone has a part number that would help tremendously..

I remember when my throttle cable was loose asf and tightening it improved the gas pedal immediately.

Another thing is to check all 4 brakes for seized calipers and pistons. A seized caliper would slow down the vehicle due to heavy drag - this happened to my Civic and caught the problem to be a seized rear caliper.

T4topher · 03-06-2021, 07:22 PM

Quote:

Originally Posted by FD7683

I remember when my throttle cable was loose asf and tightening it improved the gas pedal immediately.

Another thing is to check all 4 brakes for seized calipers and pistons. A seized caliper would slow down the vehicle due to heavy drag - this happened to my Civic and caught the problem to be a seized rear caliper.

I did previously adjust my cables but Im wondering if I adjusted the kickdown incorrectly. I definitely need a new throttle cable as it’s pretty much maxed out and it’s still a bit loose.. I just installed new oem tundra calipers/rotors/pads, rebuilt them myself and they work flawlessly. Not sure about the drums though.

Bad Luck · 03-08-2021, 01:15 PM

Quote:

Originally Posted by T4topher

I did previously adjust my cables but Im wondering if I adjusted the kickdown incorrectly. I definitely need a new throttle cable as it’s pretty much maxed out and it’s still a bit loose.. I just installed new oem tundra calipers/rotors/pads, rebuilt them myself and they work flawlessly. Not sure about the drums though.

The "kickdown cable" only adjusts transmission hydraulic line pressure and does not change when the transmission will shift. If that cable is too tight you will have very hard shifts.

T4topher · 03-08-2021, 04:24 PM

Quote:

Originally Posted by Bad Luck

The "kickdown cable" only adjusts transmission hydraulic line pressure and does not change when the transmission will shift. If that cable is too tight you will have very hard shifts.

Good to know, I’ll try messing with it a bit tonight and see if it changes at all. Thank you everyone for all the suggestions and insight, much appreciated!

FD7683 · 03-08-2021, 07:16 PM

Quote:

Originally Posted by T4topher

I definitely need a new throttle cable as it’s pretty much maxed out and it’s still a bit loose.

I think you will need a new throttle cable, not the throttle body unit.

T4topher · 03-08-2021, 09:26 PM

Quote:

Originally Posted by T4topher

Good to know, I’ll try messing with it a bit tonight and see if it changes at all. Thank you everyone for all the suggestions and insight, much appreciated!

Well just tried adjusting the cables around a bit and makes no difference at all. I think I’m gunna try to see if it still happens if I lock it into L vs 2 vs D.. that should really tell me wether it’s the transmission or not I’m thinking.

Edit: seems like it only happens in 2 and D not in L so I’m now suspecting the shift solenoid. Finally a potential clue!! Lol.. Do I replace all 3 or try to figure out which is the one that is causing the trouble?

Bad Luck · 03-09-2021, 09:48 AM

Quote:

Originally Posted by T4topher

Well just tried adjusting the cables around a bit and makes no difference at all. I think I’m gunna try to see if it still happens if I lock it into L vs 2 vs D.. that should really tell me wether it’s the transmission or not I’m thinking.

Edit: seems like it only happens in 2 and D not in L so I’m now suspecting the shift solenoid. Finally a potential clue!! Lol.. Do I replace all 3 or try to figure out which is the one that is causing the trouble?

If it was me, I would replace all the solenoids and install a transgo shift kit when I had the pan off. I'd also use a felpro gasket for the trans pan instead of the sealant. That stuff is a bear to get off.

19963.4lsr5 · 03-10-2021, 10:04 AM

Have any of you with the problem ever watched your LTFT when it happens?

How old are your O2 sensors?

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T4topher · 03-10-2021, 12:41 PM

Quote:

Originally Posted by 19963.4lsr5

Have any of you with the problem ever watched your LTFT when it happens?

How old are your O2 sensors?

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Haven’t watched LTFT but my 02 sensors are practically brand new. Going to try my transmission solenoids and maybe the transgo kit.

Quote:

Originally Posted by Bad Luck

If it was me, I would replace all the solenoids and install a transgo shift kit when I had the pan off. I'd also use a felpro gasket for the trans pan instead of the sealant. That stuff is a bear to get off.

Seems like there are two shift solenoids and one over drive solenoid, found the number for the shift solenoids (180$ each.. ouch) but can’t find the number for the overdrive solenoid.. thinking about doing the transgo kit, I think there are two kits for our transmission (sk340 vs 340hd2) seems like the sk340 might be less race car like but everyone that I’ve seen do the install used the 340hd2.. hmm.

19963.4lsr5 · 03-10-2021, 01:24 PM

How old is your TPS? That runs the whole show from gear selection to kicking down to fuel and ignition timing maps.

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Bad Luck · 03-10-2021, 01:27 PM

Quote:

Originally Posted by T4topher

Haven’t watched LTFT but my 02 sensors are practically brand new. Going to try my transmission solenoids and maybe the transgo kit.

Seems like there are two shift solenoids and one over drive solenoid, found the number for the shift solenoids (180$ each.. ouch) but can’t find the number for the overdrive solenoid.. thinking about doing the transgo kit, I think there are two kits for our transmission (sk340 vs 340hd2) seems like the sk340 might be less race car like but everyone that I’ve seen do the install used the 340hd2.. hmm.

There's a write up on the 340hd2 kit: Transgo 340-hd2 install and reveiw The 340hd2 kit has 2 ways you can modify the valve body. Either truck or race shifts with truck being softer than race shifts. You might try asking the OP what he thinks of it since it's been a few years on his install.

T4topher · 03-10-2021, 07:33 PM

Quote:

Originally Posted by Bad Luck

There's a write up on the 340hd2 kit: Transgo 340-hd2 install and reveiw The 340hd2 kit has 2 ways you can modify the valve body. Either truck or race shifts with truck being softer than race shifts. You might try asking the OP what he thinks of it since it's been a few years on his install.

Saw that one, there is a pretty detailed write up on Tacoma world as well. I just wish someone had a review of the sk340. I might call transgo and just see what they say about it/recommend. Probably try to message OP as well just to see what he says.

TransGo A340 F (4x4) Valve Body Shift Kit Install (with pictures) | Tacoma World

Quote:

Originally Posted by 19963.4lsr5

How old is your TPS? That runs the whole show from gear selection to kicking down to fuel and ignition timing maps.

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Brand new oem toyota with less than 500 miles on it.

ocbruin · 03-23-2021, 07:18 PM

My 2001 had the same issue. Cleaned the maf and hooked it up to a multimeter and everything was within spec's. I ordered "returned" maf on amazon hooked it up to a multimeter and it behaved differently than my old one.

I put it in the car and symptoms resolved. Definitely try a new maf.

FS: 3rd GEN 4wd sr5 - white exterior/tan interior, $4000 orange, ca
2001 Toyota 4Runner - Cars & Trucks - Orange, California | Facebook Marketplace

T4topher · 03-25-2021, 06:29 PM

Quote:

Originally Posted by ocbruin

My 2001 had the same issue. Cleaned the maf and hooked it up to a multimeter and everything was within spec's. I ordered "returned" maf on amazon hooked it up to a multimeter and it behaved differently than my old one.

I put it in the car and symptoms resolved. Definitely try a new maf.

FS: 3rd GEN 4wd sr5 - white exterior/tan interior, $4000 orange, ca
2001 Toyota 4Runner - Cars & Trucks - Orange, California | Facebook Marketplace

Only reason I’m hesitant on getting a new MAF is because my buddy let me borrow his and it didn’t change a thing.. Also my testing procedure of shifting into different gears really narrowed it down IMO, it wouldn’t happen at all when it was stuck in 1st gear.. I ordered 2x shift solenoids (the over drive solenoid was $$$) and the transgo kit. Really hoping this does the trick.

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