Question:
can anyone tell me why this happens and how to fix thanks
Answers:
Help with car trouble...?
In a cursory check of the engine combinations for this vehicle, it's generally a DOHC engine, which doesn't have lifters, so as the previous poster noted valve springs could be weak. 5000 RPM is near the top of the range for that motor. Generally speaking, though, weak valvesprings show up as loss of power, i.e. acceleration flattens out when the valves float because the spings can't pull the valves closed fast enough. The V-8's (66' Olds 4-4-2, 84' Pontiac Trans-AM 5.0L) I experienced this with never mis-fired but simply lost power. You might have a bad ignition coil, as that could cause mis-firing, if it's breaking down at high RPM. You didn't says if it does this when it's hot or cold, but if does it when it's hot, I would have the coil checked. Check the spark plugs and see if they all look uniform in tip color or if perhaps there's one cylinder that looks oily or blacker that the others. Could also be a cracked plug - checking the plugs wouldn't hurt.
How do I remove the fuel injectors from a 1993 Eagle Vision?
its not supposed to run at 5000 rpm throw more saki into the fuel system. Buy an AMERICAN muscle car is the only way to fix it. no really sounds like valvesprings.. I m sure you probably checked fuel psi and plugs, wires , etc could also be hi rpm fuel starvation cant tell ya without being there to see it for myself good luck
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