Symptoms of a bad ECU?!?!?! - Honda-Tech

Go Back   > >
Log In 

Symptoms of a bad ECU?!?!?!

LinkBack Thread Tools Search this Thread
Old 07-21-2007, 04:36 AM   #1
Honda-Tech Member
Thread Starter
Fighterinsnatch's Avatar
Join Date: Apr 2006
Location: Panama City, Fl, USA
Posts: 276
iTrader Rating: (0)
Default Symptoms of a bad ECU?!?!?!

What kind of things would one see if the ecu is no good?(besides not starting)
Fighterinsnatch is offline   Reply With Quote
Old 07-21-2007, 05:08 AM   #2
Honda-Tech Member
97Ej6mike's Avatar
Join Date: Nov 2006
Location: Really slow,, NJ, USA
Posts: 3,299
iTrader Rating: (0)

A wrong ECU (faulty too i think?) would be shown by a blinking check engine light, but im not 100% sure on that, that may be caused by too many malfunction codes at once. Happened to me on a swap upon first start.
97Ej6mike is offline   Reply With Quote
Old 07-21-2007, 11:44 AM   #3
Honda-Tech Member
slowcivic2k's Avatar
Join Date: Jul 2006
Location: Illinois
Posts: 2,781
iTrader Rating: (0)
Default Re: (97Ej6mike)

A faulty PCM will do all kinds of random crazy stuff, just about any problem a car could have would happen because of this, but very randomly. Expect random multiple CEL's for no reason, poor fuel mileage/misfire/knock (if the car runs at all). You could also have a fire in there. But most of today's PCM's have no reason to fail, that was a long time ago and electronics are much better. When you mess with them is when you risk trouble.

If you burned up some transistors in there it would smell aweful, like burned electronics do.
slowcivic2k is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
cb7tuning ecu twotone65 Honda Accord (1990 - 2002) 1 05-19-2014 08:44 AM
ECU Reset ultimatehonda Honda Civic (2006 - 2015) 5 06-12-2007 04:08 PM
how to reset ECU? HONDAVTIS Honda Accord (1990 - 2002) 3 01-23-2007 03:16 AM
'eat ecu' gunmetal prelude Honda Prelude 4 03-21-2006 02:28 PM
ecu si foo Honda CRX / EF Civic (1988 - 1991) 5 07-02-2002 07:08 PM

92, accord, bad, broken, check, ecu, engine, faulty, h22, honda, hondatech, light, long, olds, signs, symptoms, wrong

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -8. The time now is 09:39 AM.

Honda and the Honda marquee are registered trademarks of the American Honda Motor Company, Inc. Neither American Honda Motor Company nor its subsidiaries or affiliates shall bear any responsibility for content, comments, or advertising. is not affiliated with American Honda Motor Company in any way. American Honda Motor Company does not sponsor, support, or endorse in any way. Copyright/trademark/sales mark infringements are not intended or implied.