cut out above 3500 rpm

tbirdtony

Registered User
the car has been running good but the other day i got my foot in to it a little harder and it would cut out like it was starved for gas or spark was weak. if i came off the throttle it would run fine again. i'm learning to use my snap on 2500 but i have a hard code concerning my park neutral safety switch and can't run a koer test. just thought someone may have had the same issue. the coil and engine control module are relatively new and had new plugs and wires about 3 years ago. car is a 1993 sc
 
Double check that the coil pack plug is actually plugged in all the way. I had the same issue a few months ago.
 
Did your tach drop, like the one in the video? I would be checking for what Ford calls, "continuous codes", crank signal, and power at the DIS module, also. Even a PCM power loss, from the EEC relay, etc. Does it do it consistently, now?
 
It's almost always an ignition problem. Could have a loose, melted or shorting plug wire. Loose wiring connection to coil pack or DIS module or it's a bad coil pack. If you are using a Screamin Demon coil pack, that's probably the issue. I chased a misfire under a load at high rpm for years and it ended up being a bad coil pack.
 
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