87 300zx wont rev past 2500 rpms
 

i have a 87 nissan 300zx non turob it starts and idles perfect but when you give it gas it revs between 200 and 2500 rpms ive tried unhooking the mas and no change the dash lights stay on like when you start it up but they never go off i heard it could be the idle up silenoid but im no expert i love this car and id do anything to have it back on the road so any help would be greatly appreciated