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RPM surge

Old Feb 10, 2021
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RPM surge

hello guys ive searched around on this topic for a bit before posting.

Recently cleaned the throttle body, yes i opened it using the throttle and cleaned it didnt push the flaps by hand and stuff. but now when am in neutral the rpm surge between 2k all the way upto 3k and come down and then go up again and keeps doing it untill the car fully stops WHEN IN NEUTRAL AND COASTING

and it idles around 900-1k but before the cleaning it used to idle perfeclty.

another thing when going to change gears the car revs up for some reason now? and when i let go of the throttle in gear it takes a second and then i feel like the throttle is let go.

No codes only codes i have are for an O2 sensor and evap code

what should i check for next? new throttle body? MAP sensor? MAF sensor? am all out of ideas
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Old Feb 11, 2021
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Re: RPM surge

anyone at all? smh
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Old Feb 12, 2021
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Re: RPM surge

What did you clean it with?
Did you take off a vacuum hose and forget to put it back on? Vacuum leaks can cause high idle.
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Old Feb 17, 2021
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Re: RPM surge

cleaned it with a throttle body cleaner, didnt take anything off at all just took the body off the intake and cleaned it, noticed the gasket was a bit dirty so i just got a thermal gasket on it and now when i brake the rpm bounce up and down when iam stopped like they are surging i honestly have no idea what could be it , i havent drove it yet after putting in the new thermal gasket cause roads are not it right now but ill report later if driving it after fixed anything.
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Old Feb 17, 2021
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Re: RPM surge

mite be ur TPS check that cuz I once had a problem with the rpm going up and down. after changing the TPS problem solved.
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Old Feb 17, 2021
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Re: RPM surge

can u get that as a separate part? or would i have to replace the throttle body with a used one?
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Old Feb 18, 2021
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Re: RPM surge

Originally Posted by qazz96
can u get that as a separate part? or would i have to replace the throttle body with a used one?
u can buy it separately and then search on YouTube on how to put it on. thats what I did.
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Old Feb 18, 2021
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Re: RPM surge

If you have a scanner that will show live data you can see if the TPS is reading correctly. I would expect a fault if it were not though.

Recheck your work again. Verify you got everything hooked back up properly. A vacuum leak anywhere can cause high idle.
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Old Feb 26, 2021
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Re: RPM surge

checked live data TPS seems fine, blips go up to 17% and then back to idle at 14.1%, honestly if i cant figure it out ill just live with it but i dont like the engine reving like that for no reason.
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