blacktop sr20det misfire, rough idle HELP!!!

[blacktopforever]

ok so today my car was running fine up until i was on my way to a freinds house and i was riding in first i then started hitting boost i went to shift into second and its like all the rpm's dropped real low, i came to a stop and then the car started to idle real low like at 500 to 700 rpm , it feels like its misfiring, real bad, i have ngk bkr7e spark plugs that are faily new i dont think thats the problem, i checked the connecters for the coil pack, mafs, injectors ect, i couldnt find anything unplugged , like i said when i turn the car on it idles real jumpy like its misfiring when i acceerate it bogs like the fuel is being held back or somthing does any advice for me??thanks

[blueballa]

clean your maf with maf cleaner, check all you vacuum lines. make sure they are all on tight and no pipes cracked. check turbo, turbo gaskets. check compression. make sure you set idle with the tps off. check iacv. do a boost leak test, or just sea foam your intake to see if you have a leak ( highly recommended)

i had a very similar problem, it turned out my main vacuum line from my wastegate was cracked, i cut the end and pushed it back on and wah-la.

i would check compression first and then hunt for exhaust leaks.. then vacuum leaks

[blacktopforever]

thanks for the tips, I installed a new fuel filter pulled the spark plugs and one of them was cracked i replaced the plug started it up and shes running better than ever....