i have a 91 integra with a 95 jdm gsr..i convert the wiring to an obd1 except the injectors..the car has a hard time starting when its cold and does put out the power it suppose to..when driving the car is sometime normal but has a hard time getting up..when i smash on the pedal, the car doesn't even get up..but when 6k gets around in vtec, the car will put...i have no power on the lower end at all..the car surge on the low rpm until 4k or 5k..i have a stock gsr throttle body with a skunk intake manifold,dc 4-1 header,ACT extreme pressure plate with a 6 puck disc, and 8lb ACT flywheel..could it be the valve clearances or blown head gasket...all vaccum hose are hook up and no leaks...i also have a new distributor and my timing is set correctly...any help or advice out there...