1993 mustang cant run after 5000 rpm!!! Please help before major transform!!!

pancho510 said:

24# injectors with 255 fuel pump holley with inline vortech fuel pump

Click to expand...

There is your stall.

You have plenty of pump. My opinion is you are shy on the injectors for a boosted 347. Heck if it was me, Id run 30-36 injectors on a N/A 347. You may need 42's. But your boost is relatively low.

Does it buck any before it stalls? Fuel Pressure Ok?

EagleAutosports said:

The engine stalls if it reaches 5000? You could be running lean at high rpm but what ignition system do you have? The stock system is decent but it starts dropping power around 5000.

Click to expand...

This is what I was getting at Eagle. And I think the injectors are playing a big part in this. Blown and N/A combos are totally different in the Fuel delivery part. The reason I asked if it was bucking..... And my injector theory. I believe they go hand n hand in your situation. Meaning the bucking is related to the small injectors. Raising fuel pressure is only gonna do a very little when the injectors are too small. I suggest you look at your plugs. And I also suggest not taking it to 5000 if its leaning out. Or your motor will be trashed.