So my car is always idling at 1000 rpm and when I drive it far distances it'll start to idle around 1200 rpm. I've tried fixing it by adjusting the idle screw with the iacv unplugged and everything. Also I can't find a vaccum leak anywhere. I just need some help on trying to figure this out. Thank you

 

Could be a dashpot.

 

What is a dashpot? Lol

 

Also I forgot to say that I did a Mpfi swap with a b7 intake manifold.

 

Bump

 

Bump

 

My hatch idles high as well, even up to 3000rpm, found out the gas pedal sticks a lil bit, so I created the habit of lifting the pedal up from the back, works for me, but is not properly fixed.

 

I would seriously just replace all your vacuum lines

I just did this.. lines looked old but still good... passed the carb cleaner test

Check the line to the Fuel Pressure Regulator.

If the regulator doesn't get enough sucking the RPM goes higher.

Could be a regulator...

But hit advance auto and pepboys replace every vacuum line you can .. will probably cost you $20 and probably something you should do anyway...

then .. test the fuel pressure regulator
you will need a fule pressure tester .. you hook it to your fuel filter at the service bolt

harbor freight has a $19 fuel pressure tester well it was $19 last week when i got one.