1994 bronco 351
#31
In that case it's looking like it's not ignition related, in which case it must be injection related. So the next test I'd recommend I've never actually had to do but should tell you a lot. Google injector noid light test. Basically an LED light is wired in with the injector and will flash with the injector pulse. If the injectors are not firing at that rpm then the LED light will stop flashing. This only works with a rather specific LED bulb, a normal test light will not work. Only LEDs flash fast enough while only needing a small amount of electricity.
#33
In that case it's looking like it's not ignition related, in which case it must be injection related. So the next test I'd recommend I've never actually had to do but should tell you a lot. Google injector noid light test. Basically an LED light is wired in with the injector and will flash with the injector pulse. If the injectors are not firing at that rpm then the LED light will stop flashing. This only works with a rather specific LED bulb, a normal test light will not work. Only LEDs flash fast enough while only needing a small amount of electricity.
#34
so heres the scoop guys I did the noid light test and as far as the electrical part of the injectors them are fine I don't no why I didn't check the injectors them selves before hand I guess I just didn't think it was fuel related and maybe im getting ahead of myself but I went ahead and pulled a few of the injectors and you would not beleave the crap that came out of them rust dirt grime it was awful so I have 8 brand new accel injectors that I had from another project im gona put them in tomorrow or first thing sat morning I will let you guys no what happens I hope the injectors are the problem
#35
#36
so heres the scoop guys I did the noid light test and as far as the electrical part of the injectors them are fine I don't no why I didn't check the injectors them selves before hand I guess I just didn't think it was fuel related and maybe im getting ahead of myself but I went ahead and pulled a few of the injectors and you would not beleave the crap that came out of them rust dirt grime it was awful so I have 8 brand new accel injectors that I had from another project im gona put them in tomorrow or first thing sat morning I will let you guys no what happens I hope the injectors are the problem
#37
its got a brand new fuel tank from this winter thinking of that is what maid me think of the injectors the tank leaked bad when I got it it was all rotted and completely out of gas and had been sitting for 4 or 5 months I don't have a dime invested in the new injectors so why not try it I plan to blow out the lines when I remove the rail
#38
#39
#41
#45
So we know it's not fuel related? And we know it's not spark related?
Does the temperature of the engine have any effect on the rpm at which it cuts out?
Do an oil change lately?
Did you by change put in a thick oil?
Have an accurate oil pressure gauge, not the stock Ford one?
My reason for asking, I have seen once an engine where the oil pressure bypass stuck closed. This caused the oil pressure to spike causing the hydraulic lifters to pump up holding the valves open.
It's a shot in the dark but we're grasping at straws here.
Does the temperature of the engine have any effect on the rpm at which it cuts out?
Do an oil change lately?
Did you by change put in a thick oil?
Have an accurate oil pressure gauge, not the stock Ford one?
My reason for asking, I have seen once an engine where the oil pressure bypass stuck closed. This caused the oil pressure to spike causing the hydraulic lifters to pump up holding the valves open.
It's a shot in the dark but we're grasping at straws here.