3500 stick

[Mafia Mustang]

Hey guys I got a modded 90 mustang. and My problem is. When the car is just sitting and I go to rev it up it sticks at 3500 and drops like there is a rev limiter on it. And if i try to Drive it it starts to go then it bucks once it get to that rpm. Im kinda confused on this cuz i though it might be Valve Float but I tourqed it to specs could it be bad vacuum?

 

[samickguy15]

What did you do before this happened? Did you rebuild the motor? I might suspect that you didn't hook up your nuetral safety and your car is hitting the "nuetral rev limit". I don't recall if the Mustang ECU's had that, but alot of cars do.

 

[ninety15.0]

There is no neutral rev limiter in the mustang computers. This must be an ignition or fuel problem. My bet is something in the ignition....perhaps the TFI midule, PIP sensor???

 

[SuperStang83]

If it has cats they could also be clogged, not likely, but worth looking at.

 

[Mafia Mustang]

I got a New X pipe on it so it not the cats but it has old 02 sensors on it. maybe thta could be suspect. I switched a couple PiP sensors out. Ya it is a new Engine Its been happing ever since I ve had the new engine in. This dont sound like Valve Float right?

 

[Mafia Mustang]

bump

 

[Hickfied]

Check your fuel PSI when it does that. If you dont have a gauge, go ahead and change your fuel filter.

 

[SVT32VDOHC]

Mine spurttering was at 4,500...come to find out it was just in need of a tune up. My plugs were worn to a gap of .070. I gapped them to .048....my car runs like a raped ape now. I mean, it's not fast cause it is stock, put it has 100% full potential.