I can't get up to freeway speed

1991 FORD LTD
172,000 MILES
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TEEJAY123
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yes first of all hello...i have a 91 ltd crown victoria lx 5.0 and the car doesnt like to go over 40-45 it takes its time to do so. i dont get the violent shaking and no the motor isn't reving faster than the car is moving its like its running a lilttle lazy...so my guess is not the tranny...also at first start it idles very low to the point it wants to cut off after it warms up its fine...please help
Oct 11, 2011 at 3:11 AM
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JACOBANDNICKOLAS
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Has the check engine light ever come on?
Oct 11, 2011 at 3:12 AM
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TEEJAY123
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YES THE CHECK ENGINE LIGHT IS ALSO ON IT ACTUALLY NEVER TURNS OFF BUT WHEN I GET IT CHECKED IT DOESN'T THROW ANY CODES
Oct 11, 2011 at 3:15 AM
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JACOBANDNICKOLAS
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That is interesting. Check to make sure the wiring harness is properly attached to the ECM. Next, check the throttle position sensor and check to make sure the catalytic converter isn't plugging. Finally, check to make sure the fuel pressure is within spec at the fuel rail.
Oct 11, 2011 at 3:32 AM
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TEEJAY123
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OK THANK YOU FOR ALL THE HELP I WILL TRY EVERYTHING MENTIONED FIRST THING IN THE MORNING
Oct 11, 2011 at 3:43 AM
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JACOBANDNICKOLAS
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Give me a yell tomorrow and let me know what you find.
Oct 11, 2011 at 3:53 AM