my dad gave me a 65 mustang with a 1990 5.0 and have been trying to get it going. the car runs but it won't rev past 3500rpm. when i drive the car it runs good but when i put it in neutral and rev it a little bit it won't pass 3500. i'm new to this so i really don't know what could be the problem besides maybe the timing. i'm about to put in an MSD distributor with the 6al box. i was wondering if i should do that first or try and figure out why it doesn't go past 3500.
1964 1/2 Mustang (Teal Green), Ford 302, Bored .030 over, 3/4 cam, Edelbrock Performer 289 Intake Manifold, Edelbrock 650 CFM Carb, Hooker Headers/Collectors, 2 1/2" Exhaust Pipes, H-Pipe, Summit Glasspacks, 15" Magnum 500's, Cooper Cobra 215/65 front - 235/65 back, Summit 3 1/8" Tach w/ Shift light, 105,000 Original Miles On Body, 2500 Miles On Engine, Interior and All Chrome/Decals are Original and in Great Shape!
1992 Deep Emerald Green Mustang GT Hatch, 5 speed, 2.73s, Mac fenderwell cold air intake, '93 Cobra MAF, Mac 70mm throttle body & spacer, Explorer intakes, Mac unequal headers & offroad pipe, Magnaflow catback, Walbro 110lph fuel pump, Jet adjustable FPR, MSD Blaster coil, Accel 8mm wires, FRPP aluminum quadrant, UPR firewall adjuster, stock cable, Granatelli upper control arms.
Waiting to go on: Granatelli lower control arms, and GT40 Iron heads!
That's odd, that it'll run past 3500 with a load against it, but won't, without a load...
If you put it in gear and floor it, what'll it run up to?
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1992 Deep Emerald Green Mustang GT Hatch, 5 speed, 2.73s, Mac fenderwell cold air intake, '93 Cobra MAF, Mac 70mm throttle body & spacer, Explorer intakes, Mac unequal headers & offroad pipe, Magnaflow catback, Walbro 110lph fuel pump, Jet adjustable FPR, MSD Blaster coil, Accel 8mm wires, FRPP aluminum quadrant, UPR firewall adjuster, stock cable, Granatelli upper control arms.
Waiting to go on: Granatelli lower control arms, and GT40 Iron heads!
Sooo...why do you want to rev your car over 3500 RPM when you are not moving or in gear?
duh! to look cool!
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1964 1/2 Mustang (Teal Green), Ford 302, Bored .030 over, 3/4 cam, Edelbrock Performer 289 Intake Manifold, Edelbrock 650 CFM Carb, Hooker Headers/Collectors, 2 1/2" Exhaust Pipes, H-Pipe, Summit Glasspacks, 15" Magnum 500's, Cooper Cobra 215/65 front - 235/65 back, Summit 3 1/8" Tach w/ Shift light, 105,000 Original Miles On Body, 2500 Miles On Engine, Interior and All Chrome/Decals are Original and in Great Shape!
i haven't checked it yet because it drove with no problem. i came home and reved it for my buddy and it didn't pass 3500. so one of my buddies said we should check the ecu computer. it turns out that the one in there was for an automatic. when i would start my car it would idle at like 5000rpm and then drop back down. we put in the A9L computer and the car started like brand new. so i don't know if maybe that has something to do with it.
1965 mustang with 5.0 does not rev past 3500rpm 
