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Dyno Problem @ 5700 RPM

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Old May 21, 2004 | 04:13 PM
  #21  
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Go log a run on the atap/efilive/tech-II. If the injectors go over 85% they go static. which basically means anywhere from 85%+ you're injectors are wide open. I doubt it would make that much of a power loss though.

Any reason you're revving that high? my stock car (lid/catback) didn't make any power past 5500rpm.. or did i read that wrong that your car isn't stock?
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Old May 21, 2004 | 09:44 PM
  #22  
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Originally Posted by soliari
how does the car idle / drive around town . I saw something similar (though not as severe) and it turned out to be my O2 sensors. the other thing I was experiencing was bogging at low rpm or after sustaining rpms for a while and a hunting idle.
Driving while moving is no issue, although at idle at stop and go traffic it tends to do the shake&wobble quite a bit while sitting. It can be quite annoying having a car that shakes when you havent even put a cam in. I hadnt noticed the 5700 rpm issue until the dyno was done in an attempt to diagnose the misfire issue. When it is misfiring sometimes it will do a doubleshake and feel like it wants to fall on its ***.

I have o2 sims in the rear banks and the front banks show activity. Is there a way to tell specificly that they are bad? Corvettes of Houston, Speed Demon, and MTI have all seen the o2 sensors im sure on the tech2 and none have said they are out of wack.

Regardless please relay your experiences they cant hurt
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Old May 21, 2004 | 09:46 PM
  #23  
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Originally Posted by samz28
Go log a run on the atap/efilive/tech-II. If the injectors go over 85% they go static. which basically means anywhere from 85%+ you're injectors are wide open. I doubt it would make that much of a power loss though.

Any reason you're revving that high? my stock car (lid/catback) didn't make any power past 5500rpm.. or did i read that wrong that your car isn't stock?
My limiter is set at 6000 to my knowledge, but I suppose Jayson ran it up higher for testing?
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Old May 22, 2004 | 01:21 PM
  #24  
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well, in my case, the O2 sensors showed "normal" activity and even passed a daignostic test. The only reason I found then was that I got tired of screwing with the tune. I had replaced the plugs, wires, and had the coil packs checked. So, i put my car up and took out the O2 sensors and replaced them. after that, everything worked perfectly.

If you still have the rear O2's and they're in good working condition, it wouldn't hurt to swap them ....
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Old May 23, 2004 | 10:46 AM
  #25  
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Originally Posted by soliari
well, in my case, the O2 sensors showed "normal" activity and even passed a daignostic test. The only reason I found then was that I got tired of screwing with the tune. I had replaced the plugs, wires, and had the coil packs checked. So, i put my car up and took out the O2 sensors and replaced them. after that, everything worked perfectly.

If you still have the rear O2's and they're in good working condition, it wouldn't hurt to swap them ....
CoH didnt return them to me as I requested but I can probably get them to toss a pair on and tech2 it. I'll try and give that a shot this monday. Thanks for the idea.
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Old May 24, 2004 | 01:51 AM
  #26  
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The same thing happened on my 2000 Z28 with only 7800 miles. Stock springs suck. Change them and be done with it. I went with 2001 LS6 springs and it was a clean kill for the power loss.
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Old May 26, 2004 | 11:14 PM
  #27  
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TGKx,

what happened with this??? any updates???
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