Loss of power when accelerating

[Tracyberkey6]

Forgot to mention we have had the throttle body cleaned but this has done nothing.

I have the same problem, but only when its cold and first starting out and only in 1st gear.
I felt that it was either am airflow problem or a throttle body issue. Throttle body was just serviced, so I went out this morning and took off the air filter and left the housing open.
It worked 90% better immediately!!!
Still a bit sluggish at the very beginning of acceleration, so am heading to get a new Mass Air Flow Sensor.
Im betting this will fix it!

 

[Jshaver.1]

Has anyone figured out the no acceleration...feels like neutral?? My trans fluid looks and smells great....truck starts rigjt on and idles great everytime...but i xant drive because the truck will just rev and bot accelerate....i start...put in reverse and if im on a hill it will roll forward like its in neutral...then i shut it off...start back up..put in reverse and it back out fine...put in drive and it will either creep witj high rpms and then not upshift...or it just sits there and revs....i feel like this could be something simple....when this happend i was driving aboit 50 mph and it just stopped accelerating....i pulled over ..started back up and it drove fine....3 miles later did it again....there were no noises...no bad feeling...no grinding or slipping...just smoothly revs and doesnt go anywhere...if i push it to about 3000 rpm it will start moving slowly but will not upshift

I am clueless on this.....i do. H
ave a code p0125..insufficient coolant temp closed loop...a lil sludgy in bottom of overflow...but no signs of milkshake in tranny....tranny fluid is perfect

 

[gbettancourt]

Same issue.. Throttle body?

We have a 1998 4-Runner that is frustratingly doing the same thing as mentioned above- massive power loss when accelerating after the engine is warmed up. We have done the following to address the problem, but no resolution:
-new fuel filter and pump
-new coils and plug wires
-new MAF sensor.

Any other ideas??

First of all, I'm surprissed with all the support in this forum!!

Same issue in a '03 4-Runner, new fuel filter and pump, but after that i've been reviewing and I think that could be the throttle body. The tricky here is that after some time driving and pressing the accelerator with no response seems that the problem dissapear and the 4-runner runs good again..

Did anyone change the Throttle Body?

PS. No codes here, but haven't scann it on a toyota dealer, just particular.

 

[e85rsx]

i have a similar problem .. truck is super charged gen 3 and while accretion it gets to about 3k rpm and starts surging and will not continue to accurate .. car feels super slow, did new plugs, new cats, car has no codes, and put a new maf????

 

[GlockSpitting]

i have a similar problem .. truck is super charged gen 3 and while accretion it gets to about 3k rpm and starts surging and will not continue to accurate .. car feels super slow, did new plugs, new cats, car has no codes, and put a new maf????

Any luck? Having similar problem. Hearing a whistling noise when accelerating and when I do step on it rpms go up but no acceleration. If I step on the gas softly i have no issue.

 

[tsheaby]

So this just happened to me while on a 650mi road trip.

Every time I hit a bump in the highway, I would suddenly loose power.

Turns out it was a fuse that had popped out and became loose. Wow!

 

[Paul O'Brien]

I have a 2000 limeted 4runner with 85000 miles on her and when i step on the gas she falls flat on her face does'nt matter at what speed i'm at or if i'm parked same result. I did however cleaned the MAF and put new plugs in and air filter same thing still no power when give it more than half the throttle. Otherwise it rives just fine starts up great everthing else is working great. Getting ready to lift it 2.5" and put some bigger tires on so i would like to have the power for the bigger tires.

I too have a similar issue.I have a 2002 Limited 4runner, I get the slip indicator light come on ususally when I'm turning left, and lose power completely.
Any help would be greatly appreciated.
Paul

 

[smann]

Has anyone came up with a solution for this?
My 2017 4runner trd pro with 75k mi is experiencing loss of power while acclerating. No check engine light or pending codes. Cleaned maf, changed filter, changed plugs, ran fuel treatment. I’m stumped!

 

[harmoo]

Has anyone figured out the no acceleration...feels like neutral?? My trans fluid looks and smells great....truck starts rigjt on and idles great everytime...but i xant drive because the truck will just rev and bot accelerate....i start...put in reverse and if im on a hill it will roll forward like its in neutral...then i shut it off...start back up..put in reverse and it back out fine...put in drive and it will either creep witj high rpms and then not upshift...or it just sits there and revs....i feel like this could be something simple....when this happend i was driving aboit 50 mph and it just stopped accelerating....i pulled over ..started back up and it drove fine....3 miles later did it again....there were no noises...no bad feeling...no grinding or slipping...just smoothly revs and doesnt go anywhere...if i push it to about 3000 rpm it will start moving slowly but will not upshift

I am clueless on this.....i do. H
ave a code p0125..insufficient coolant temp closed loop...a lil sludgy in bottom of overflow...but no signs of milkshake in tranny....tranny fluid is perfect

Wondering if you ever got your answer to this? mine was doing the exact same thing!

 

[Hungryhawk]

I always have to remind myself to first do the simple - to clean components.
Then, if necessary, replace easy access inexpensive components.
Then trouble shoot bigger expensive components: sometimes a multimeter can be used to check it per test procedures.
Then then asking around or posting here for experienced inputs.
If vehicle needed asap I locate a independent shop with old school mechanics not dependent upon CEL or codes to assess. (Usually not a dealer).

 

[AuSeeker]

Wondering if you ever got your answer to this? mine was doing the exact same thing!

The member you quoted posted that well over 6 years ago, and looking at his profile he hasn't been back on the forum since he post that, you won't be getting a reply from him!

 

[Wijan]

Facing same problem

I’m having the exact same issue with my 2000 Limited 4x4, and it’s been frustrating trying to track down the cause. Like you, I’ve replaced the air filter, changed the spark plugs, and even cleaned the MAF sensor, but the problem persists. From what I’ve read and experienced, it could be a failing fuel pump, clogged fuel filter, or a throttle position sensor (TPS) issue. A weak fuel pump might not be delivering enough pressure under load, causing the engine to bog down when you give it more throttle. I’m planning to check my fuel pressure next to see if that’s the issue. Have you looked into that yet? Let me know if you’ve found a fix—I’d love to get this sorted out!

 

[Hungryhawk]

Have you tried driving in S4 instead of "D".
Could be an issue with VSC. My 5th gen hesitates with no power when I hit a bump accelerating or sometimes when leaving a driveway I get a bump crossing the gutter.
I find downshifting to S2 or S3 gives me full power especially when jumping into traffic from a driveway.
Turning off VCS also seems to disable the engine power loss, but down shifting is easier!

 

[cullowheebandit]

I had a similar issue with my older truck, and it turned out to be a fuel pump problem. At first, I thought it was something simple like the air filter or plugs, but after replacing those and still having issues, I checked the fuel pressure. Ended up needing a new fuel pump. It could also be worth looking into the throttle body or checking if the throttle position sensor is working properly, as that can sometimes cause hesitation like you’re describing.