Ok. First off i've done numorous searches and havnt been able to find a situation quite like mine. I just installed a new downpipe, enfini y pipe, and changed out the spark plugs and spark plug wires with magnecor wires. I had the car out for about a half an hour and everything ran great. When I got back I had it sitting for a few hours and when I went to start it up the idle was extremley lumpy jumping between 500 and 900 rpms (sounds like a mad v8). I tried taking it out but when trying to barley get on it or anything the car starts bucking really bad and starts backfiring. I pulled all the spark plugs and realised fuel started dripping out of the spark plug holes, so i replaced the spark plugs and deflooded the car. Still no luck so I tried several more times and still have the same problem. I checked all the spark plugs to see if they all spark and they spark great. If I pull the fuel pump fuse, the car runs great until it runs out of fuel. But once i start it with the fuel pump on back to the same problem. Any suggestions to what the problem could be?! Also mods are intake, downpipe, cat back, enfini y pipe.

Alex

 

MAP sensor hose.

-Max

 

^ or stuck open injector... (remembering the post about someone who had fuel fill their motor, intake tubes, and intercooler)