1993 LX V6 won't rev

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rs2600
Last seen
Joined
Jul 24, 2019
Thunderbird Year
1993
It starts right up and idles nice, goes down the road without any problems but when I floor it
it wont rev above 2500. I've changes thr cap/rotor/wires and plugs but no change. I tried to check the
timing but I didn't find any makings on the block or the pulley. What could be the issue?
Forgot, every now and then the "check engine" light comes on but goes out after a few seconds.
 
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