I just got my evo i know its running a bit rich it blows alot of black smoke but i think its lagging or something. Every time i get on it is studders breaty bad. If i kinda easy into it before getting on it, it wont studder as bad. The car runs great besides that. Anyone know whats going on or what could be going on? Could it jsut need a retune?
mods-
Ported and Polished head + intake manifold,
AEM Standalone Engine Management System,
Wideband,
HKS EVC5 Electronic Boost Controller (21 lbs),
HKS Cams 264's,
HKS Hi Power turbo back,
HKS SSQV Blow off valve,
HKS Fuel Injectors (660's),
Fuel pressure regulator,
HKS Front Mount Intercooler Type R,
HKS Kansai Service spark plug cover + timing belt cover,
HKS Kansai Side Canards,
Blitz Turbo Timer,
HKS Intake,
Cusco Oil Catch Can,
DNP Exhaust Manifold,
Samco Hoses,
HKS DLI Twin Power,
Hyper Voltage System,
HKS Twin Disc Clutch,

 

boost leak...sounds like what happened to me when I blew my intercooler pipe off...check all your pipes to make sure they are clamped down tight...

 

ok will do thanks. I forgot to note that it studders so bad it liek shakes the whole car around. Ill check im pipes... Could it be something other than that tho?

 

Is your clutch slipping?

 

spark plugs?

who tuned it?

why did you list your spark plug cover like that matters?

 

it needs spark plugs i know that. It hasnt been tuned in about two years. And i listed thos parts cuz i have a whole list writen down in word so i just copy and pasted.

 

bumpp!! noticed today it only seems to do it in low gears like 2nd and thrid,

 

Start with the simple things like plugs and a fresh tune.


Take it from there.

 

NEED HELP... i notice when tightening my clamps that in my intake pipe one of the bolts was loose. I tightened it and my car isn't doing it as bad but still is lagging pretty bad. I tightened all the clamps... Idk what it could be!

 

change your spark plugs...

 

try plugs first.
id bet it be ignition related or tune related.

 

i change the spark plugs two days ago still doing it

 

change gap to .024

 

Another smart thing to do is replace that HKS BOV, those leak way too much!

I would also gap the plugs to .018 assuming they are a step or 2 colder.

 

.018 is way too tight of a gap, at the most do .022 maybe .020, now you sure your plug boots and spark plug wires are still in good shape, did you put dye electric grease in them so that way you dont short the spark to the head. double check your egr valve vacuum line n make sure its on and ziptied down. other then that do a boost leak test.