Engine Bogging Down On Acceleration

[twijr1]

hello all, here recently i have noticed on acceleration the engine tends to bog down or stumble when the throttle is depressed about a third of the way. it is really noticeable after being at highway speeds then exiting and trying to accelerate from a near complete stop. i have repair manuals and i have checked the MAF, throttle body motor, and tps for resistance checks and they are good. there are no codes present. i dont have a lexus hand held tool, so a lot of the checks in the manual i can not do. does anyone have any thoughts? thanks in advance.

[dcfish]

hello all, here recently i have noticed on acceleration the engine tends to bog down or stumble when the throttle is depressed about a third of the way. it is really noticeable after being at highway speeds then exiting and trying to accelerate from a near complete stop. i have repair manuals and i have checked the MAF, throttle body motor, and tps for resistance checks and they are good. there are no codes present. i dont have a lexus hand held tool, so a lot of the checks in the manual i can not do. does anyone have any thoughts? thanks in advance.

How many miles on the GS ? Have you ever cleaned the TB ? Check for any vaccum leaks, Does it idle normal ?

[twijr1]

hello all, here recently i have noticed on acceleration the engine tends to bog down or stumble when the throttle is depressed about a third of the way. it is really noticeable after being at highway speeds then exiting and trying to accelerate from a near complete stop. i have repair manuals and i have checked the MAF, throttle body motor, and tps for resistance checks and they are good. there are no codes present. i dont have a lexus hand held tool, so a lot of the checks in the manual i can not do. does anyone have any thoughts? thanks in advance.

How many miles on the GS ? Have you ever cleaned the TB ? Check for any vaccum leaks, Does it idle normal ?

it has 134,000. i cleaned the tb when i installed the SRT intake and ecu about 10,000 miles ago; i hope that is not the problem. i haven't checked for vacuum leaks and it idles normally. i will check the vacuum leaks tonigt.

[twijr1]

hello all, here recently i have noticed on acceleration the engine tends to bog down or stumble when the throttle is depressed about a third of the way. it is really noticeable after being at highway speeds then exiting and trying to accelerate from a near complete stop. i have repair manuals and i have checked the MAF, throttle body motor, and tps for resistance checks and they are good. there are no codes present. i dont have a lexus hand held tool, so a lot of the checks in the manual i can not do. does anyone have any thoughts? thanks in advance.

How many miles on the GS ? Have you ever cleaned the TB ? Check for any vaccum leaks, Does it idle normal ?

it has 134,000. i cleaned the tb when i installed the SRT intake and ecu about 10,000 miles ago; i hope that is not the problem. i haven't checked for vacuum leaks and it idles normally. i will check the vacuum leaks tonigt.

checked for any vacuum leaks, could not find anything.

[SKperformance]

Replace the maf.

[twijr1]

Replace the maf.

thanks skp. replaced the maf. very little lag time and much better throttle response. :)

[SKperformance]

I would remove the srt module and compare it as well to se if it is part of the issue as well.

[Xpound]

Replace the maf.

Hey whats the maf?

[dcfish]

Replace the maf.

Hey whats the maf?

Mass air flow sensor B) It is located between the air intake filter and the throttle body, Can't miss it.............