hi heres a list of mods and it runs very very rough at low rpm and runs well high rpm
head port polish big valves schrick cam
intake port polish
17% pulley
ati super harmonic bottom pulley
intercooler form mitsubishi evo 12 front mount
jcw 380 injectors
2.5 od exhaust
msd coil
msd wire set new plugs
shark tuner

thats it i think hope you can help thanks

 

You might want to give some more info and detail.......

Did it start running rough all of a sudden, after a certain mod, or has it always ran rough?

Have you checked your spark plugs and wires? Have you checked compression? Have you checked the engine vacuum at idle? Have you done any other trouble shooting?

If the motor is mechanically in good shape, I would take a look at that Shark tuner.

Also....can you post up some pictures of your EVO12 Front intercooler mod? I'm interested to see how you did the plumbing from the supercharger to the intercooler, and the back to the cylinder head.

 

hi thanks for reply car running fine till i had it e tested it did overheat aswell after e test will post some pictures as soon as i can

 

How does a smog test work where you are? Here they just hook it up to an OBDII reader and check for codes and ready status.

 

hi same here in ontario Canada car was runnig fine till e test when it came out of shop it was idling very badly missing hesitating at low rpm but when put your foot hard in to it goes like a rocket thanks

 

I'm guessing it's just a coincidence then and not something the test did. I would start with carefully going over the intake connections and vacuum hoses to make sure nothing popped off or broke.

 

You mentioned that it overheated during the e test? How did that happen? What do they do when they put the car through the test? Wide Open Throttle for long periods of time?

Just trying to get some more details......trying to figured out how an emissions test would overheat the motor.

 

hi fan stop working over heated on the way home from test they just do obe test ,do you think i need more fuel or maybe less i have 380 injectors thanks

 

It sounds like you have multiple questions all wrapped up into one. If the car was running fine before it overheated.....then your problem is most likely a result of the motor overheating. How hot did the motor get? Did it blow a head gasket? Have you check compression?

As far as the tuning question you had....more or less fuel with the 380 injectors, I would get your car running right before ever playing with the tuning. Do you have an A/F gauge? Without that, you are going to have a hard time tuning the car on your own. Who tuned it for you the first time? Are you doing the tuning yourself via the shark tuner??

How long have you had the car? Did it have all the mods when you got it? If not, did you do all the mods?

Im a little lost here......

 

I see you say fan stopped working. Sounds like electric issues, maybe a blown low speed relay?