Shaney

Okay so I've seen other people ask about this but my problem seems a bit different..

I was sitting in my driveway revving my car in different ways to pinpoint exactly what's happening.

So if I slowly rev my car up to 2k and hold it there, the rpm will slowly start to drop until it bogs down to like 200 RPM and bogs even without ever taking my foot off the gas. (Bad thing)

Then I revved my car up to 4k rpm and held it there and it didn't move at all and after releasing the pedal, the rpm went down consistently until 950-1000 RPM. (Good thing)

Sometimes the RPM will even hang after disengaging the clutch and slowly drop at inconsistent speeds.

I can also feel my car pulsing when the car idles at 500-600 if that has anything to do with it.

I've cleaned my IAC valve and cleaned my MAP sensor as well as securing it with zip ties. No luck with either.

It's been doing this since I bought the car and I'm tired of it, someone please give me suggestions!

Kenshyn

You could always try to relearn the ECU. I'm not 100% sure on the process so you'll want to look it up, but it's along the lines of unhooking the battery (make sure you have your radio code if it's the factory radio) for about ten minutes, hook it back up, and then hold the revs at 3,000 for 10 minutes


Also, for what it's worth, my car has always done this after it is warmed up; it drops to about 400 rpm after revving it or starting it back up. I've learned to just live with and accept it as a quirk of the car considering it's very, very common.
If the car doesn't actually die, I wouldn't worry about it too much.

Shaney

I did the ECU reset and idle learning process and that seemed to get rid of the rpm drops and my car didn't jerk/buck anymore at low rpm for a day. :c

Common but not normal in my opinion. I was just watching a video of a guy revving his s2000 and it drops to the 1k rpm bar every time. Mine is inconsistent.. sometimes dropping to 1000 and other times dropping to 400 depending on how high I rev my engine.

DARK_S2000

I cleaned the IAC valve too, It made it a world apart much better, but it still does it whenever I put my foot on the gas at a light and rev it like a itty little bit without noticing, it bogs down to 500rpms. tbh like Kenshyn said, you just learn to live with it. my speed actually bogged down and died at a light but that was something entirely different.

Shaney

I know it's really not that big of a deal but it makes me feel like something on the car isn't working as intended and I want to fix it. :c

RickyLee

if you havent fixed it look up my post i was too busy for work to post it til today.