EK jumpy rpm needle help?

[dudomite]

Hi guys,

So something I noticed about my car, when it is not moving (e.g. waiting on red light) sometimes the rpm needle keeps dropping down close to 0 and then jumps back to 1 whether the gear is on N or D. I don't think it's normal as other times the rpm needle stays on 1.

Any suggestions as to what's causing this? Feel free to ask more questions about the car. Cheers.

[dc2r-0636]

Does the actual RPM of the engine drop ?

Or just the tacho drops up and down ? If its just the rpm tacho playing up its your ICM ( ignition control module) in the distributor

[dudomite]

@dc2r-0636: I can hear the engine quieting down and revving itself when the rpm needle goes down and up respectively.

[dc2r-0636]

does it always do it? or just when its warm start up? or just when its cold start up?

-your timing could be off
-clogged fuel filter
-intake leak somewhere
-vacuum leak

or evn a dirty throttle body

[flipfire]

Clean out the IACV first, its usually just clogged. There are guides in the DIY section.

[dudomite]

@dc2r-0636: It doesn't always happen, sometimes it's steady at 1. It usually happens when the car is on the road for a while. I want to know how serious is this problem, I might visit a mechanic after I get my tax return.

@flipfire: Ah I see thanks for the info