lincoln crazy problems

[lincoln75th]

1☆) Symptoms
•Car will only rev up when warm (200°+)
•po174, po171
•horn not working
•cut off at operating temperature
•catalytic converter glows red
• check engine light won't come on

♢ what I done so far
* clean fuel injectors and test them
*Replace ignition coils
*Replace tps, all 3 pcv and egr sensor
*Cleaned maf and IAC
*Change spark plugs
*removed exhaust system no change in engine performance
* spread around engine for vacuum leaks with Carbon cleaner no change in engine

[Crvett69]

couple links that may help
http://www.ebay.com/gds/Ford-Lincoln...6253093/g.html

https://www.youtube.com/watch?v=_T0Td7HiEJk

http://troubleshootmyvehicle.com/for...d-p0174-page-1

[lincoln75th]

I tried the vacuum leak Theory didn't work for me