Hello All,
Bucar says I have "the infamous horn honk csx stall". OMG Is it worse than COVID????
91 SBEC on 87 CSX,



1)Still causes Check engine light when I blow the horn. A super short toot is likely not an issue but a one second one is bad

2)Causes AF to drop to below 10, slowly recovers over a 10 second period back to normal

3)Seems to be worse on a warm engine.
4)switched to a different ECU and the issue appears to go away but need to check this again.

5)Was going to check if it is a load issue on the IGN or peizoelectric effect

6)I did not notice this issue last year.


Brian suggested to first examine the column and horn wiring and connectors for power feed to the ECU. Grounds too perhaps.
Any additional thoughts?