hey everyone so after putting in new spark plugs in my evo 9 for some odd reason the car has been idling hiring than normal, the vacuum is also a little higher, also wen in neutral if i step on the brake the cars idle drops to almost 300rpms then bounces to 900 rpms, n it fluctuates until i let off the brake, and wen cruising after i hit above 3100rpms the car starts to sputter until i have to press harder on the gas pedal. can anyone help me, ive been seraching all around n have had no luck please any insight would be greatly appreciated.

 

Which spark plugs did you install?

 

Did you double check the throttle cable as you might have kinked it or moved it to install the plugs?

 

i installed ilfr7h ngk iridium spark plugs

 

Did you gap them correctly? i would also check the throttle cable as mentioned above

 

+1 check the gap

 

on the forums it was recommended to gap them .20 -.24 n the spark plugs came gapped at .20 already so i just put them in, i checked the cable n its fine, so should i gap them higher?

 

check your charge pipes and may one blew off ?

 

i might sound like a newb but wuts a charge pipe?

 

Check your Intercooler pipings if It's loose.

 

Lol ok, sorry I just never heard them be called charge pipes, but after work today I'm ganna re check everything including the ic pipes, thank u all for your help and advice. Hopefully she will be running good before the snow gets here, I want to have some awd fun

 

sorry charge pipe, intercooler pipes ect. all the pipes connected from throttle body to turbo. Usually when I blow off a pipe it runs like you explain it. I since then upgraded to T-Bolt clamps becuase I have so much pressure going through.