Rockers installed, computer learning issue? (PROBLEM SOLVED) - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 06-24-2006, 11:00 PM   #1
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Default Rockers installed, computer learning issue? (PROBLEM SOLVED)

I just put my rockers in, took it for a quick spin and at 5700 RPM it bogs down hard and pulls up to 14* of KR. Does the computer need more time to learn to put more fuel? I was thinking valve float, cause I left the stock springs, but it revved to 6 grand no problem before. What'* goin on with my car?
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Old 06-25-2006, 12:03 AM   #2
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Only with the modified stock rockers can you run stock springs. If you have rollor rockers you need springs. You could rev to 6k before cause you didn't have the lift you have now.
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Old 06-25-2006, 03:58 AM   #3
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When you rev to 5700 rpm, does it fell like the motor hits a brick wall and will not rev any higher, or is it more of a gradual powerloss above 5000 rpm.

If it suddenly looses power, but continues to rev at 5700, you've probably got valve float and need stiffer valve springs.
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Old 06-25-2006, 05:58 AM   #4
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Quote:
Originally Posted by BlownBuick
When you rev to 5700 rpm, does it fell like the motor hits a brick wall and will not rev any higher, or is it more of a gradual powerloss above 5000 rpm.

If it suddenly looses power, but continues to rev at 5700, you've probably got valve float and need stiffer valve springs.[/b]
plus invest in a set of OR pushrods as well...
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Old 06-25-2006, 01:02 PM   #5
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Quote:
Originally Posted by SSsuperchargedEi
Quote:
Originally Posted by BlownBuick
When you rev to 5700 rpm, does it fell like the motor hits a brick wall and will not rev any higher, or is it more of a gradual powerloss above 5000 rpm.

If it suddenly looses power, but continues to rev at 5700, you've probably got valve float and need stiffer valve springs.[/b]
plus invest in a set of OR pushrods as well...
He did.

Right here in my pink hospital barf tote.
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Old 06-25-2006, 01:08 PM   #6
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The computer needs more time to learn.
Mine did that when I first installed the 3.4" pulley. I was so anxious to discover the new power, I went out right away and tried some full throttle burns. Yup, like hitting a limiter. The Intense reburn helped as well by richening up the fuel curve a little.

Glad to hear that you finally installed those rockers. They will gain you a few tenths. :P
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Old 06-25-2006, 09:52 PM   #7
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Quote:
Originally Posted by 2000SilverBullet
The computer needs more time to learn.
Mine did that when I first installed the 3.4" pulley. I was so anxious to discover the new power, I went out right away and tried some full throttle burns. Yup, like hitting a limiter. The Intense reburn helped as well by richening up the fuel curve a little.

Glad to hear that you finally installed those rockers. They will gain you a few tenths. :P
Yeah, it'* like hitting a wall at 5700 rpm. I'm hoping it just needs time to learn, cause I really don't want to do another rocker swap....
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Old 06-25-2006, 10:02 PM   #8
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Quote:
Yeah, it'* like hitting a wall at 5700 rpm.
Like a rev limiter wall or just a drop in power? Sounds like valve float. Hate to say it but you may need to crack back open them valve covors. Trust me I know its a bisitch.
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Old 06-25-2006, 10:07 PM   #9
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Rev limiter wall. Yeah, it'* a pain. This'll be my third time doing it.....Oh well, that'* what I get for trying to cut corners....
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Old 06-25-2006, 10:14 PM   #10
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You should also dissconnect your PCM for over an hour. This will help it "learn" once its re-connected.
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