Go Back   Honda-Tech > Honda and Acura Model-Specific Technical Forums > Honda CRX / EF Civic (1988-1991)
Sign in using an external account
Register Forgot Password?
Search


Welcome to Honda-Tech!
Welcome to Honda-Tech.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Honda-Tech community today!


Reply
 
 
 
submit to reddit
 
Thread Tools Search this Thread
Old 07-09-2011, 05:20 PM   #1
clonestocker
Trial User
Garage is empty, add now
 
Join Date: Jul 2011
Posts: 1
iTrader Rating: (0)
Default 1990 Civic CEL/ECU Problems?

Having some problems on my son's Civic. It's been over a 100 degrees here and the CEL has been coming on. If you check the LED on the ECU it's 1 lond flash and 16 short flashes. If you put a jumper wire in the 2 prong plug to check the stored code it does nothing. Also, it occasionally won't start. It will crank and crank but won't start. When it cools off outside the car starts fine. Please help! matt
clonestocker is offline   Reply With Quote
Old 07-09-2011, 06:46 PM   #2
OneBadTurboCRV
Honda-Tech Member
Garage is empty, add now
 
OneBadTurboCRV's Avatar
 
Join Date: Sep 2007
Location: IN Your Mind
Posts: 5,751
iTrader Rating: (0)
Default Re: 1990 Civic CEL/ECU Problems?

On 88-91's the codes are checked via the LED on the ECU. The connector is only for setting ignition timing.
__________________
'98 CRV EX
'13 Civic Si

Last edited by OneBadTurboCRV; 07-10-2011 at 08:43 AM.
OneBadTurboCRV is offline   Reply With Quote
Old 07-09-2011, 10:07 PM   #3
garthjenkins
Honda-Tech Member
Garage is empty, add now
 
Join Date: Nov 2010
Location: Tillamook, Oregon
Posts: 223
iTrader Rating: (0)
Default Re: 1990 Civic CEL/ECU Problems?

hmmm.. yeah he is right about he blinks try counting again.

I had a ef civic hatch back in high school that wouldnt start if it was hot outside, would just crank and crank

but if it was a cold early morning she fired right up but no codes.....never did figure that one out
garthjenkins is offline   Reply With Quote
Old 07-10-2011, 06:27 AM   #4
jlicrx
Honda-Tech Member
Garage is empty, add now
 
jlicrx's Avatar
 
Join Date: Sep 2002
Location: colorado springs, co, usa
Posts: 5,177
iTrader Rating: (0)
Default Re: 1990 Civic CEL/ECU Problems?

Quote:
Originally Posted by clonestocker View Post
Having some problems on my son's Civic. It's been over a 100 degrees here and the CEL has been coming on. If you check the LED on the ECU it's 1 lond flash and 16 short flashes. If you put a jumper wire in the 2 prong plug to check the stored code it does nothing. Also, it occasionally won't start. It will crank and crank but won't start. When it cools off outside the car starts fine. Please help! matt
sounds like you, if you are counting correctly, have codes 1 for O2 sensor and 16 for fuel injector circuit - OBD0 D-series ECUs do not have long and short flashes, only short - make sure that you are counting correctly - the symptoms you describe would be consistent with a bad ignition control module (igniter) which would be a code 15 - ECU flashing 15 times - could also be a bad main relay - i would start by checking main relay

Click the image to open in full size.
__________________
ZCspeed Racing

Last edited by jlicrx; 07-10-2011 at 07:05 AM.
jlicrx is offline   Reply With Quote
Old 07-10-2011, 09:41 AM   #5
95GSRnj
Honda-Tech Member
Garage is empty, add now
 
95GSRnj's Avatar
 
Join Date: Oct 2008
Location: NJ, usa
Posts: 15
iTrader Rating: (0)
Default Re: 1990 Civic CEL/ECU Problems?

Try replacing the PGMFI relay. My 1990 STD did the same thing when it was hot out sometimes I would drive to a store run in grab a soda come out and it wouldn't start, I replaced the relay and haven't had an issue since.
__________________
sometimes you're the windshield, and sometimes you're the bug
95GSRnj is offline   Reply With Quote
 
 
 
submit to reddit
Reply

Tags
1990, 8891, 89, cel, check, civic, code, codes, computer, count, ecu, failures, flashing, honda, led, light, problems

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
Forum Jump



All times are GMT -8. The time now is 02:32 PM.



2008 Copyright, InternetBrands Inc.
Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.

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 Honda-Tech.com content, comments, or advertising. Honda-Tech.com is not affiliated with American Honda Motor Company in any way. American Honda Motor Company does not sponsor, support, or endorse Honda-Tech.com in any way. Copyright/trademark/sales mark infringements are not intended or implied.
Emails & Contact Details