So I have noticed a new problem that has been going on with my car. Not really a problem just kind of annoying.

When my car sits in idle at stops or just warming up the engine will begin to pulse. The rpm stays the same just seems like the engine is kicking ever so slightly.

Wondering if any once else has experienced this or has an explanation for why this occurs.

 

my car does this too. never bothered to ask tho. ill be watching this thread.

 

yea so does mine....watching for an answer

 

Perhaps a vid if possible or better explanation. Not quite sure but the best I can say until more info would be AC compressor kicking on.

 

well with mine pretty much anytime you start it it will say idle a lil less than 1000 and bounce up and down around that. even if the motor is hot or cold. idt its a problem or anything but idk. and the a/c is turned off so it shouldnt be the compressor

 

if your a/c isnt on, pull and check your plugs.cel?

 

Idle hunting - ive seen it alot with turbo setups but never a stock car

 

it is stock....no cel...

 

Check for vacuum leaks and fouled plugs then. The only other things it could be are expensive and unlikely (O2 sensor, MAF Sensor, Throttle Body). A small and smooth amount of idle hunting is normal while it is warming up but if it's already been running at operating temp for a bit and it still does it constantly then you should start poking around under there.

 

No CEL. Happens when the car is warm or cold. RPMs stay the same always happens when it is under 1000. I did start to notice this when I took off my CAI and reinstalled the stock air box. Maybe this could be it. Can't remember if I disconnected the battery when I did this. Maybe just need to restart the ECU.

Ill check the plugs tomorrow.

What should I be looking for with the plugs? How or where should I check for vacuum leaks?

 

So the plugs are fine. Still not sure what is up.

No one has any ideas?

 

Reset the battery if you changed intakes. Check for small vacuum leaks. Beyond that, it may just be normal depending on altitude/temp/density of air... it's common to have that on turbo setups but not OEM lol.