Greetings All,
I am new here and am in need of help. I have a 1989 honda accord lx. It's an automatic and it's carborated. I have a Haynes Manual but it doesn't tell me where the ECU is. I need to find the ECU so that I can get the problem codes from it.

Recently my accord started to rev up to 3500rpm's upon start and it stays that way and after I shut it off it diesels(commonly called after-run)meaning that the engine still sort of goes after I shut it off. I can't figure out the cause I've been through several things. I messed with the idle speed and checked some vacuum hoses. I'm not leaning towards some sort of sensor damage.

If anyone here could suggest some remedies to my problem and the main thing tell me where the ECU is on my accord and a bit about it that would be great

Thanx