Check engin light.....
Moderators: RedRacer, spiffyguido
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- Prelude Enthusiast
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- Joined: Tue Feb 22, 2011 1:34 pm
- Prelude Model: '90, Si
- Location: Houston, TX
Check engin light.....
Howdy ya'll,
I own a '90 Prelude Si with 247,000 miles on it. Up until now I have only had minor issues with it; recently I started getting the check engine light either after accelerating from a dead stop (rather quickly) or after 20 or so mins of running at 65mph. Any reason as to why this may occur. Your help is greatly appreciated.
I own a '90 Prelude Si with 247,000 miles on it. Up until now I have only had minor issues with it; recently I started getting the check engine light either after accelerating from a dead stop (rather quickly) or after 20 or so mins of running at 65mph. Any reason as to why this may occur. Your help is greatly appreciated.
- spiffyguido
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- Prelude Model: 1991 SE-SR
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- Prelude Enthusiast
- Posts: 5
- Joined: Tue Feb 22, 2011 1:34 pm
- Prelude Model: '90, Si
- Location: Houston, TX
Re: Check engin light.....
Its weird, I get one long flash (-), 4 short flashes (-,-,-,-), and 3 fast flashes (--,--,--)
- spiffyguido
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Re: Check engin light.....
Is there a lengthy gap between any of these codes? I wonder if what you're getting is two separate codes.
Sounds like one of the codes is 14, which is the EACV valve. I had the same code on my Prelude two summers ago, and it also popped up after a long blast down the highway.
The behavior I got was that my car would bog if I didn't keep my foot in the accelerator at least a moderate amount. Do you get this behavior?
Sounds like one of the codes is 14, which is the EACV valve. I had the same code on my Prelude two summers ago, and it also popped up after a long blast down the highway.
The behavior I got was that my car would bog if I didn't keep my foot in the accelerator at least a moderate amount. Do you get this behavior?
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- Prelude Enthusiast
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- Prelude Model: '90, Si
- Location: Houston, TX
Re: Check engin light.....
Yeah, The first one comes one (_), a second later I get the 10 code (_____), followed by the 3 code (__,__,__) followed by what seems to be another 3 quick burst (_,_,_)
- spiffyguido
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Re: Check engin light.....
That almost sounds like 3 separate codes. Code 1, Code 13 & Code 3. Which is Oxygen Content A, Atmospheric Pressure Sensor and Manifold Pressure Sensor respectively.
I'd love to see a video of this flashing. It's hard to make sense of the flashes. Is this the PK2 ECU? See the sticker on the side.
I'd love to see a video of this flashing. It's hard to make sense of the flashes. Is this the PK2 ECU? See the sticker on the side.
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- Prelude Enthusiast
- Posts: 5
- Joined: Tue Feb 22, 2011 1:34 pm
- Prelude Model: '90, Si
- Location: Houston, TX
Re: Check engin light.....
Thanks Spiffy, thats what I was afraid it would be. After reading up on it the AP Sensor is built into the ECU, which means get a new one. The other parts seem to be easy enough to find, where can I send the video once I get it?
- spiffyguido
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Re: Check engin light.....
Don't panic and go get an ECU just yet. Start with seeing if you can get the MAP sensor to stop throwing a code.
If the video is under 20 MB, send it to forumadmin@preludedriver.com. Better yet, upload it to youtube and post the link so others can see.
If the video is under 20 MB, send it to forumadmin@preludedriver.com. Better yet, upload it to youtube and post the link so others can see.
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- Prelude Enthusiast
- Posts: 5
- Joined: Tue Feb 22, 2011 1:34 pm
- Prelude Model: '90, Si
- Location: Houston, TX
Re: Check engin light.....
Thanks Spiffy, I will get the video tonight and upload it ASAP. A quick side note: I began having the "rough idle" issue this past week. Once the car warms up the idle bounces between 500-1k, not revving too high but will not stay stable.