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Old 07-24-2006, 10:32 PM   #1
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Default Loosing power after driving for a while
Setup: 93' b18c hatch
AEM CAI
Stock radiator
No CEL's

My car feels noticably weaker in the midrange (2000-5500) after I have been driving for 20 minutes plus. I have no issues before that, and am getting no fluctuations in the temperature gauge. Under normal driving (1/2 throttle) it feels less torquy, and when I wind it out, the car still feels sluggish untill normal power kicks in when I exceed 6000 RPM's.

Any ideas what it could be?
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Old 07-24-2006, 10:37 PM   #2
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have you checked your plugs dizzy cap and wires??
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Old 07-24-2006, 10:41 PM   #3
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The car has new plugs and wires
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Old 07-24-2006, 10:43 PM   #4
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i would check the dizzy cap and roter and if you have a fuel pressure gauge i would check that too fuel pump could be getting week i had ine do that shit one time
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Old 07-24-2006, 10:48 PM   #5
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I will check thoes things out. It just baffles me that this only happens when I have been driving it for a while.
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Old 07-24-2006, 10:53 PM   #6
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well i have seel weird shit working at Autozone (not anymore thank god) but chevy ign. modules are bad about that shit with heat and i have personaly had a fuel pump go week on me and kinda same shit
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Old 07-24-2006, 11:04 PM   #7
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Is there any way to determine if the dist. is bad?
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Old 07-25-2006, 09:56 AM   #8
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yea, the car doesn't run

20 minutes of driving = motor getting to normal temp
intake temps heating up, etc

pull a compression test when cold, then drive for 30 minutes and pull another compression test...
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Old 07-25-2006, 05:59 PM   #9
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The motor was compression tested across the board at hmotorsonline where i got it. I have only put 1500 miles on it since the swap, and have taken it pretty easy. I have the numbers back at my parent's house, but I know that it was perfect. Besides, if it was the compression that was bad, wouldn't I be loosing power up top? It feels fine up top, but is just very peaky. It feels weak in the midrange. The acceleration isn't smooth at all....
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