Okay, I just checked my CEL and i don't know if I did it right but the code I got was either:

90 Evaporative Emission Control System leak detected in the fuel tank area
91 Evaporative Emission Control System insufficient purge flow

Nothing else has 9 long pulses so it was pretty easy to figure out. I think its the second one but I am not sure. If I replace the sensor/valve whatever on the intake manifold will the CEL go away or do I need to reset it or something.

 

Anyone?

 

try a new gas cap. whoops i thought i clicked the prelude forum. Anyways, yea i had the same problem on my prelude with the same code (cel code 90). I replaced my gas cap and the cel was gone. Cap was like 10 bucks. They could be the same, I dont know. Just trying to help out.

 

Yeah I think it was code 91 though, insufficent flow.

 

well if you're not sure go outside and count again.

 

LOL yeah, its not that I can't count, I get 9 long ones and what I think is 1 short 1. Code 9 would have 0 short ones correct?

 

code 9 would be 9 short ones, code 90 would be 9 long ones and then a long break and the next code would start or the same code if there are no other codes.

 

Oops, yeah thats what I meant to say code 90 would be 9 long pulses.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nors &raquo;</TD></TR><TR><TD CLASS="quote">Oops, yeah thats what I meant to say code 90 would be 9 long pulses.

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GAS CAP!