Problem with throttle (RPMs fluctuate)

Anything related to the Kizashi can go here, but please look at the other headings first. Your topic may fit better under something else.
Post Reply
Endeavour1200
Posts: 82
Joined: Tue Nov 10, 2020 11:36 am

When I'm holding the throttle steady, the rpms fluctuate alot. Like if I've held the throttle at 1500rpms, the rpm needle goes down to 1300, then to around 1650, then settles down to 1500, then after a few seconds down to 1300, 1650, 1500 and this cycle continues.

I'm not sure as to what the problem could be, throttle body was cleaned along with an oil change 10k kms ago, MAF is clean too I suppose. Engine was warm.
Car had a delayed throttle response because of a bad O2 sensor, O2 sensor is fixed but delay is still existent though not noticeable. I know my motor mounts are worn and the pressure plate is on its way out, but other than that, there is no other "problem" with the car.

Any help appreciated!
Top
User avatar
Woodie
Posts: 1196
Joined: Sun Apr 28, 2013 10:09 am
Location: Laurel, MD

Pressure plate? Do you mean the Clutch pressure plate? If you have a manual then the rpms are not fluctuating like that, the car would be jerking violently enough to give you whiplash.
Alcohol, Tobacco, and Firearms
Should be a convenience store, not a government agency
Top
Endeavour1200
Posts: 82
Joined: Tue Nov 10, 2020 11:36 am

Woodie wrote: ↑Wed Jun 01, 2022 12:00 pm Pressure plate? Do you mean the Clutch pressure plate? If you have a manual then the rpms are not fluctuating like that, the car would be jerking violently enough to give you whiplash.
Yes I mean clutch pressure plate, and yes I know it has nothing to do with this issue, but I stated it nonetheless.
Top
User avatar
Drem
Posts: 86
Joined: Thu Mar 24, 2011 3:03 am

Whenever I experience "sputter" performance I suspect the fuel filter. Try replacing that, should be cheap.

Sent from my SM-G975U1 using Tapatalk

2011 - Sport SLS AWD - Platinum Silver
Top
old tech
Posts: 791
Joined: Mon Apr 23, 2018 1:51 pm
Location: n/w pennsysvania

Turn heater fan speed to 0. Does it still do it? Trying to eliminate ac cycling as cause.
Top
Endeavour1200
Posts: 82
Joined: Tue Nov 10, 2020 11:36 am

Drem wrote: ↑Sun Jun 05, 2022 8:27 am Whenever I experience "sputter" performance I suspect the fuel filter. Try replacing that, should be cheap.

Sent from my SM-G975U1 using Tapatalk
I could try that, don't know about the fuel filter availability though
old tech wrote: ↑Sun Jun 05, 2022 9:21 pm Turn heater fan speed to 0. Does it still do it? Trying to eliminate ac cycling as cause.
Yup, still does that. AC fan was off.
Top
User avatar
SAEED_KIZZY
Posts: 564
Joined: Wed Sep 13, 2017 2:31 pm

Endeavour1200 wrote: ↑Tue May 31, 2022 3:19 pm When I'm holding the throttle steady, the rpms fluctuate alot. Like if I've held the throttle at 1500rpms, the rpm needle goes down to 1300, then to around 1650, then settles down to 1500, then after a few seconds down to 1300, 1650, 1500 and this cycle continues.

I'm not sure as to what the problem could be, throttle body was cleaned along with an oil change 10k kms ago, MAF is clean too I suppose. Engine was warm.
Car had a delayed throttle response because of a bad O2 sensor, O2 sensor is fixed but delay is still existent though not noticeable. I know my motor mounts are worn and the pressure plate is on its way out, but other than that, there is no other "problem" with the car.

Any help appreciated!
could be an electrical problem I am not sure but time for an oil change for sure.
Top
Post Reply

Return to “Chat About the Kizashi”