ECU Problems

I'm pretty sure my ECU is screwed, when i turn on the ignition the main relay goes nuts and the ECU light just stays on. If anyone has had this problem or knows someone who has please fill me in with some info.

Also..where can i get a new ECU for a reasonable price
What ECU's can I use

90 HB SI

I know you're in a hurry, but to get one for a decent price, you're gonna have to keep an eye out on ebay or www.thepartstrader.com ...si ecu's should be no more than like $50...at the absolute most. other ecu's you could use would be the 88-89 teg....

yeah i would go with the 88-89 teg ecu. thats the one i have and it works great. better fuel, high redline. I wouldn't pay more than $50 bucks for a stock one.

i would just go to the junkyard and pull one off a 4G civic si or 2G crx si.......too bad i gave my PM6 to my friend...could've sold it to you :(

There are no good junk yards around here, not ones with import parts anyway. Now if I wanted Chevy or Ford truck parts I bet I could get any part for any model dating back to the fifties:) I'll have to order from another junkyard and that makes me weary because I have no clue what im gonna get.
I also hate the fact that im not even sure if the ECU I have is bad. Im pretty sure but not possitive. Someone help me out here, My heads gonna explode:flash:

do you have any friends with 88-91 si's? if so....get them to 'lend' you their ecu and see how it works...

you're sure its not the main relay?

Just replaced the main relay positive thats not it

And unfortunatly I dont know anyone with a civic

I just ordered an ECU for 50 bucks so i will let you guys know how it goes. I ordered the teg ECU, thanks for the tips guys

Is there anything i need to do when installing the teg ECU or is it a direct swap?

damn if i saw this earlier you could have had my si pm6 ecu for like 40 bucks, its just sitting in my room

the teg ecu should plug right up by the way

no you do need to do anything, just plug and play:cool:

Originally posted by plkelley
Is there anything i need to do when installing the teg ECU or is it a direct swap?


you dont 'have' to do this...but its a good idea..you can swap the guts of the teg ecu into your si case...the teg case has some funky legs and doesnt bolt in to the stock location...its simple...just unscrewing a bunch of things..should take 10 mins....just be careful, those boards get a little stuck in there....

Originally posted by marked001



you dont 'have' to do this...but its a good idea..you can swap the guts of the teg ecu into your si case...the teg case has some funky legs and doesnt bolt in to the stock location...its simple...just unscrewing a bunch of things..should take 10 mins....just be careful, those boards get a little stuck in there....

Yeah he is right. It does make for a nicer install. Mine is just mooshed under the kickplate. Maybe one day ill fix it or something. Im leaning towards something...

i will probably just smoosh it for now but will definetly swap guts eventually, im just glad i dont have to do anything crazy