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b16a vtec in and out

  #1  
Old 10-26-2008, 04:23 PM
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Default b16a vtec in and out

Hey guys, my b16a in my crx is not going into vtec at 5000rpm's and then when it does it cuts in and out, its been doing it for a little while now but I thought it was the oil was getting bad and wasent engauging the vtec solenoid, but after ive done a oil change friday and driving it around then rechecked the oil to make sure it was at the proper level ( it is ) its still doing the same thing.. ive also checked the screen in the solenoid and it was clean, maybe ive got a loss ground or something.. Any idea's ?
 
  #2  
Old 10-26-2008, 04:28 PM
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Don't b16a's engage at 5500rpm?

Anyway, are you running synthetic oil? I've heard sometime people have trouble with vtec when they run synthetic (I didn't have a problem with it though).
 
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Old 10-26-2008, 04:30 PM
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Under the passenger-side carpet under the dash, is the ECU LED blinking a code? A CEL code would cause the ECU/engine to run in backup mode.
 
  #4  
Old 10-26-2008, 04:47 PM
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the check engine light is not on, ill run outside and check the ecu to see if that light is blinking and be right back
 
  #5  
Old 10-26-2008, 04:51 PM
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light goes on then flash flash flash flash flash flash flash pause flash then repeats
 
  #6  
Old 10-26-2008, 04:56 PM
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Originally Posted by Boost20 View Post
light goes on then flash flash flash flash flash flash flash pause flash then repeats
Code 7 and code 1? What do you think?:

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  #7  
Old 10-26-2008, 04:59 PM
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code 71 - Misfire detected cylinder 1

this might help

*edit: were the 7 blinks long or fast blinks? If they're long blinks, it's a code 71, if it's 7 fast blinks, pause, and 1 fast blink it's what ronj said
 
  #8  
Old 10-26-2008, 05:01 PM
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1 o2 sensor bad ( or maybe because i dont have a cat on it ) 7 throttle angle.. ive never hear of that.. any ideas on that one ?


It was a solid light then it blinked once.. long pause then blinked 7 times with no pauses
 

Last edited by Boost20; 10-26-2008 at 05:03 PM.
  #9  
Old 10-26-2008, 05:02 PM
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yea, reaper's right though
VTEC on b16a engages at 5500rpm

Originally Posted by Boost20 View Post
1 o2 sensor bad ( or maybe because i dont have a cat on it ) 7 throttle angle.. ive never hear of that.. any ideas on that one ?
not having a cat will not throw a code on OBD1 or OBD0

what OBD do you have?
 
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Old 10-26-2008, 05:03 PM
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Originally Posted by reaper2022 View Post
code 71 - Misfire detected cylinder 1

this might help

*edit: were the 7 blinks long or fast blinks? If they're long blinks, it's a code 71, if it's 7 fast blinks, pause, and 1 fast blink it's what ronj said
Yeah, I think code 71 is only for 6th generation Civics. The Civic in question is a CRX (88-91), I believe.
 

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