i went out to start my conquest it wouldnt start it cranks and cranks i checked fuel and spark its getting both of them but it wont fire dosent even sputter can anyone help

i noticed whenever i boost, then if i push in the clutch and let it go to idle then the car acts like it wants to die sometimes. my factory boost gauge will kinda float on the vac. side around 7psi or higher instead of dropping down, once the boost gauge quits doing this the idle comes back to normal. its kinda like the turbo is still putting air in and the fuel isnt there. any ideas ???

So the other night i went into a store everything was working fine, came out and my headlight dashlights, and tail lights wernt working, the switch for the headlights works cause the headlights pop up. I went to the fuse box checked the fuse and the fuse is ok, swapped it with another and same deal no lights.   Where do I start?   I was looking under the hood and on the driver side there is a box with 4 wires, somthing like ecu, head tail light, and a couple other things.   Looked at the Head

to anyone who has battled the electrical grimmlins and won, this is your question..........my 86 will start and run perfect for about 3 seconds and then stall. i have-changed battery,injectors,dizzy,checkedfuel pump,checked fuel pump wiring,checked ground wire. if i leave it alone for a few hours it runs a little longer before stalling if i leave the ignition on after i can here the injectors randomly firing   what the @#$% is going on in my car :?: