i was driving to work the other day and everything was running fine. right before i pull in to work, a white gsx pulls up next to me and we run em, and i hit 20-25psi or so. i pulled into work, parked the car and shut it off. about two hours later, i tried to leave to get some lunch, and the car was extremely hesitant to start. the rpms would hover around 500 for a few seconds, then die out. when i pressed on the gas, the fuel response was really laggy, and as soon as the boost gauge hit 0psi, it would sound like a misfire or timing off. on the vpc, i had the crank the fuel up like 200% of what i usually drive with just to get it home. i was able to get into about 5psi of boost, but very roughly. during the ride home, i tried to turn down the fuel, but it just kept stalling out. anyone have any ideas?

so far:
changed the spark plugs
checked for vacuum leaks
ran obd II scan (no codes)
radiator flush - not pertaining to the problem, but needed to be done
tightened down all nuts and bolts, etc.

 

You check all your maf/electrical connections and vacume hoses? Maybe one came off.

 

not again!!!!!

 

checked all the vacuum lines and electrical. but just in case if i missed an elcetrical connection, wouldnt the obd 2 scan pull that up? usually a code would pop up saying "---- circuit". also, i'm running vpc/gcc, so no maf. its weird because there was no warning of this.

 

Done a compression check? Maybe you blew through something and are having a massive leak.

 

you said it. hopefully, its something small, but its times like this that i wish i was stock again...

 

i will do a compression test when i get home.

 

what are you thinking could have blown? the brothers rebuilt my head about 600 miles ago and i got new valves and head gasket. i don't know if this means anything tho

 

you checked all the vacuum lines but did you check them for cracks or holes.it sounds to me like a hose popped off either the fpr or the vpc map sensor.

 

checked the fpr, all hoses were on. just to double check, there is a map sensor for the car and a map sensor for the vpc, right? also, if there is one for the vpc, is it in the engine bay or would it be near the actual electronics? thanks. i don't know too much about ems