2002 crown vic Check engine light goes on when excelerates

When I accelerate over 50 the check engine light flashes and the car doesnt want to go
unless it catches it own speed.:confused:

Does the engine seem to he shaking or feel like a miss is in it? If it does, have the codes read and see which cylinder is missing. You really need to have the codes read anyway. Most Auto Parts houses (Autozone, Advanced Auto, Pep Boys) will read the codes for free. Once the code is set, it will stay in the system for a long time. Please post back with the exact code number (P0304 or P0420). The codes will be like the numbers in parenthesis. Do not post what the person reading the code says it is. We need the number.

I Had somebody check the cylinders were fine but It does feel a bit shakky..

Did you have the codes read ? If the check engine light has been on, there is a stored code.