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1990 Honda Civic OBDO Testing

Tiny
KOOMLEE08
  • MEMBER
  • 1990 HONDA CIVIC
  • 4 CYL
  • 4WD
  • MANUAL
  • 190,000 MILES
I wanted to know how to read and check the engine light code on my 90 Civic HB. I think it's a 1.5 liter dual point fuel injected. I don't know how to read it and I think it may be my Idle air control valve because the rpms going up and down from 1500 to 500. I just need some steps on how to check the codes and maybe clearing it. Thanks.
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Thursday, April 23rd, 2009 AT 11:27 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS


https://www.2carpros.com/forum/automotive_pictures/12900_code_reading_1.jpg




https://www.2carpros.com/forum/automotive_pictures/12900_code_reading1_1.jpg




https://www.2carpros.com/forum/automotive_pictures/12900_code_reading2_1.jpg

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Friday, April 24th, 2009 AT 4:52 PM
Tiny
KOOMLEE08
  • MEMBER
  • 30 POSTS
Well hadn't done the engine light yet, but my car is getting hard to start now. I had to pump my gas pedal for it to work. It may be my fuel filter or my injectors I'm thinking. I can feel my car jump a little while taking off like it's hard for the engine to breath or not getting fuel. But when at idle, the rpm still goes a little up and down from 1500 to 500. It maybe my ile air control valve too right? To clean it, can I use carb cleaner or throttle body cleaner? Or I it better to buy a new one, which is expensive. Somewhere right there. But I will try the engine check light soon. Thanks dude.
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Friday, April 24th, 2009 AT 11:35 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Clean out the idle air control valve could be sticking and also look for vacuum leaks
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Saturday, April 25th, 2009 AT 12:01 AM

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