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Old 05-05-2019, 05:47 PM #1
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Sluggish acceleration

This is a bit vague, but Iím curious to know if anyone has experienced something similar.

When I take off from a complete stop, the 4Runner seems to be normal, normal pep or whatever you want to call it.

When it seems to be sluggish is when Iím slowing down at stop light or a round-a-bout and then hit the gas again before Iím at a complete stop. It almost feels as if Iím towing something, itís just sluggish for lack of a better term.

This is a new thing over the last couple of months, it hasnít always driven this way.

I donít think itís a locked up brake or anything like that, my mpgís havenít gone down in any way, the only time Iím seeing a difference in response is when Iím still rolling and hit the gas to accelerate again.

Also, could be related in some way, Iím currently trying figure out what has caused a small engine oil leak. Itís not from the drain plug. I took it into a shop last week and they said it was the crankshaft oil seal, so I had that replaced, but the leak is still happening. Itís small, maybe the size of a 50 cent piece over night. But itís definitely a new thing as well, started in roughly the same time frame, within the last couple of months.
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Old 05-06-2019, 12:49 AM #2
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Quote:
Originally Posted by MT Runner View Post
This is a bit vague, but Iím curious to know if anyone has experienced something similar.

When I take off from a complete stop, the 4Runner seems to be normal, normal pep or whatever you want to call it.

When it seems to be sluggish is when Iím slowing down at stop light or a round-a-bout and then hit the gas again before Iím at a complete stop. It almost feels as if Iím towing something, itís just sluggish for lack of a better term.

This is a new thing over the last couple of months, it hasnít always driven this way.

I donít think itís a locked up brake or anything like that, my mpgís havenít gone down in any way, the only time Iím seeing a difference in response is when Iím still rolling and hit the gas to accelerate again.

Also, could be related in some way, Iím currently trying figure out what has caused a small engine oil leak. Itís not from the drain plug. I took it into a shop last week and they said it was the crankshaft oil seal, so I had that replaced, but the leak is still happening. Itís small, maybe the size of a 50 cent piece over night. But itís definitely a new thing as well, started in roughly the same time frame, within the last couple of months.
Mine does something similar when my AC is turned on, I have just learned to deal with it
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Old 05-06-2019, 07:44 AM #3
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Common with E Throttle & higher mileage AT. Doing a drain/refill to refresh the system could help otherwise it is what it is.
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Old 05-06-2019, 01:42 PM #4
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Quote:
Originally Posted by UrbanRunner651 View Post
Common with E Throttle & higher mileage AT. Doing a drain/refill to refresh the system could help otherwise it is what it is.
Thanks. I do have almost 207k now.

Although its a little annoying, itís not a huge deal, I can certainly live with it. If I know thatís all it is and nothing specifically is wrong or needs to be fixed, I can handle that.

Itís when itís an unknown problem that I start to wonder if it could/should be fixed and wonder if Iím doing damage by driving it and not fixing it yet.

I do fully plan on doing a full trans fluid exchange here this spring/early summer, hopefully I get a little help from that.
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Old 05-06-2019, 05:00 PM #5
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You can always try a Sprint Booster...I have been very happy with the pep it gave the ole girl...clean fluid can never hurt either...
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Old 09-20-2019, 11:59 PM #6
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Me too!

I actually have the same issue with my 2019 TRD Off-road. Iíve only got 5k miles so mileage is not an issue for me. Itís been surprising how sluggish the acceleration has been at times. Could be the Arizona heat? Itís always been after driving for a little while during summer. Hoping winter is better!
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Old 09-21-2019, 04:41 AM #7
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I almost want to equate it to the fan clutch and AC running. With the car cool and the AC off, my issue of that goes away. I think its just the nature of these old beasts.
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Old 09-22-2019, 09:26 AM #8
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a/c compressor and engaged fan clutch definitely places more load on the engine, more noticeable at lower rpms.
Also, different from accelerating from a stop, accelerating while rolling with the trans in a higher gear will feel sluggish. Will have to hit the gas to force a downshift.
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