idle issues

Car I have a 2016 mustang GT with a Vortech v3 supercharger on it tuned by lund. I have left and right upstream O2 sensors, but no cats, and O2 sensors. The only codes I have are for the missing downstream O2 sensors. I have 3 inch long tube headers with an X pipe that goes to a 2 1/2 inch...

Hey I have a 2015 2.3L mustang I have heard all the "fixes" for Missfires at idel and startup I've tried all of them I need serious help -I have replaced the plugs about 2 months ago and they were gapped at 0.28 to my memory -I have replaced my fuel injectors and LPF sensor -I have replaced...

Hi all, I have a manual 2016 GT and I did a 2018 ported manifold with 47lb injectors. Got it all on and put the tune on and upon start up it seems to be working itself out like usual after a new mod and tune, but then rpm’s started climbing and climbing while in neutral until eventually I shut...

Hi I've been chasing this problem for awhile trying to get my car tuned I have a 2015 2.3L mustang I've already replaced my spark plugs and gapped them to .026 I've replaced my coil packs I've replaced my low pres fuel sensor I've cleaned my air filter I've also replaced my purge valve...

Hello all, I’ve been fighting an issue with my stang for over a year and after countless hours and searching I can’t seem to find a solid solution to my problem. Car: 2015 mustang GT Mod list: Paxton 2200sl 3.33 pulley 2018 intake manifold (locked out) Id1050x injectors Long tube headers...

So for the past year i been dealing with my car having a weird occasional idle problem, enhanced sometimes by the A/C. Im at 43k miles currently. I have a Corsa Intake that requires no tune, its been good until this problem started to happen. Rpms would go from 600rpm and drop to 500rpm then...

I recently got a ported 18 mani and 47lb Injectors installed on my car. I also installed a p51 intake. The car is tuned by lund. I have trouble codes p0300 and p0316. The problem I have is that my cars rpms randomly go up and down. Also if I rev the car a bit while in neutral it will rise up...

Hey folks, New on here. Will post pics soon. I have a 2017 Mustang GT with mods. I just tuned my GT yesterday and have noticed that when I am slowing down at a light my RPMs will hang at or around 1500 for about 3-4 seconds then return to 800 where my usual idle is. This also happens if I am...

Hey all, today when I started my car I began having insane idle fluctuations. It’d dip to 600 then surge to 900 and go back and forth. My afr and vacuum gauge also moved with the fluctuations. I am curious if anyone has had this issue. I’m thinking it’s the evap purge valve. I have no cel, then...

Hey guys, last week out of the blue my coyote began having idle and drivability issues that has me stumped. After it settles down from the initial startup (warm or cold), the car begins bottoming out with rpm's fluctuating between 550-900. Along with that, the air-fuel ratio jumps in the matter...