jdmvette

Car has recently been having low RPM stumble (<2000) but is throwing no codes. Video is showing neutral examples but this stumble is also present during takeoff or at highway speeds if the RPM drops below 2k. 🤔

The car drives fine at higher RPM but something ain't right...

Any help will be appreciated.

jdmvette

zeta

iTrader: (1)

^
Welcome to a dying forum.

Has the throttle body / upper intake been cleaned lately?

Robbym

I had a very similar issue and it was my EGR valve stuck open. This was when my high flow cats were failing and a small piece of cat material got logged in the EGR valve allowing unmetered air to enter the engine. If it’s not that then you might have a small vacuum leak.

jdmvette

Thanks @Robbym

How does one go about servicing the egr valve? Haven't dug too much into that area

jdmvette

So I dug into the area today to clean it up some and put in a shiny new EGR





Put everything together and it seems to have fixed about 75% of the issue.

Car seems much smoother at low RPMs

jdmvette

so the problem is now 100% resolved. the issue wasn't the EGR or any other nonsense like that.

the problem was the fake-ass counterfeit NGK plugs that came from Amazon which had all lost their igniters.

i put in new, real NGK plugs i picked up from O'Reilly's and the car is running perfect. no stumbling at low RPMs, perfect idle, strong power and I am a happy camper again.