ok, here goes.... awhile ago, my car was in an accident, and from sitting in the shop for such a lot time, the car didn't start... but we finally got it started after 6 months of repair... I drove it home no problem... then one day I back it out of my garage just to give it a car wash, when I finished washing it, the engine flooded.... it won't start again... so I changed new plugs, did the unflooding procedure, and it started again! I'm like ok, that's good... it still starts after that cos I still drove it to my friend's shop to do coolant flush. so here I am, finally finished putting in my boost controller, I start it up for a drive, it starts, but it studders really bad at idle. it normals at around 800-900 rpm, but sometimes it drops to 500 or sometimes it'll die on me... then one thing really noticable is when I try to move the car, the rpm drops really fast, and it'll stall... I had to keep giving gas to keep it from stalling.... once the car is moving. it feels like it doesn't wanna move... at 2-3000RPM, it used to pull really strong, but now it feels like a snail.... then as I come close to a stop, it wants to stall on me... could it be compression? would the boost controller cause that? could my seals been blown? any help would be great....

 

According to what you wrote it ran fine until you put in the boost controller. So look closely at what you touched and the area you were in. You sure you didn't knock off some vacuum lines while you were in there? Sounds like your hose to the pressure sensor on the firewall (labelled "Sensor - Boost") is off. And is the boost controller new or used - sure its not AFU?

 

I'm pretty sure I didn't knock off anything, but I'll double check.... and the controller is brand new