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rpms rev to only 7k, redline is 8k. NEED HELP!

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Old 10-16-2012, 12:41 PM
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Icon2 rpms rev to only 7k, redline is 8k. NEED HELP!

So I have a 99 Si, ls vtec with a gsr head and gsr transmission. I believe its a stock Si ECU but I will double check that. It was redlining at about 8500rpms and a couple days ago it started redlining at 7000rpms and still is. Anybody know why its doing this??? I always baby my car and every now and then like to get on it like anybody else does. I've only redlined it at 8500 a few times.
Any help would be appreciated it
Old 10-17-2012, 03:30 AM
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Default Re: rpms rev to only 7k, redline is 8k. NEED HELP!

Vtec is probably not engaging.
Old 10-17-2012, 03:34 AM
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Default Re: rpms rev to only 7k, redline is 8k. NEED HELP!

cat clogged?
Old 10-18-2012, 01:32 AM
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Default Re: rpms rev to only 7k, redline is 8k. NEED HELP!

Originally Posted by B23-Vtec
Vtec is probably not engaging.
As a matter of fact its not.

Originally Posted by EsotericImage
cat clogged?
No cat, wish I had one.
Old 10-25-2012, 03:02 AM
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Default Re: rpms rev to only 7k, redline is 8k. NEED HELP!

TPS calibrated?
Old 10-25-2012, 06:59 AM
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Default Re: rpms rev to only 7k, redline is 8k. NEED HELP!

I have this problem but suspect that my tach needs to be calibrated
Old 10-26-2012, 04:57 AM
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Default Re: rpms rev to only 7k, redline is 8k. NEED HELP!

Originally Posted by jdmjunk!e
Originally Posted by B23-Vtec
Vtec is probably not engaging.
As a matter of fact its not.


Sooooooo....... ??
Old 10-26-2012, 06:21 AM
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Default Re: rpms rev to only 7k, redline is 8k. NEED HELP!

Is it actually hitting a limiter?

If vtec is not working it will still rev to 8500, it just would take longer to get there.
Old 10-26-2012, 07:00 AM
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Default Re: rpms rev to only 7k, redline is 8k. NEED HELP!

The 99-00 SI Ecu has fuel cut at 8,200. I had one. If thats what he is using, that would be the correct fuel cut.
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