my car runs kinda sluggish when im pressing the pedal to the floor its acceleration sucks after it hits about 3000 -3500 then it pulls could it be cause my MAP SENOR is dirty and it might be reading wrong?? or could my timing be off?? the idle was pretty jumpy also but i replaced the spark plugs and now the idel is normal...but yea i just wanna no y my car only pulls after 3000...i just got the basic bolt ons exhaust, headers, intake..any info wil lbe appreciated