C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Down on power! Why?

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Old Jul 22, 2007 | 08:54 PM
  #21  
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Originally Posted by STL94LT1
Pull the fuel pressure regulator's vacuume line and check for fuel, if fuel is present it's bad.

The coil is located at the front of the passenger's cylinder head. Will have a coil wire (looks like a spark plug wire) attatched.
O.K, no fuel in reg vac line. In regaurds to coil being bad, I would think a coil either works or is blown and wouldnt work at all. Just thinking out loud here! Is there a simple test typically used to check bad coil?
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Old Jul 22, 2007 | 09:06 PM
  #22  
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Coils can work/fire the plugs fine at idle but, under a load will fail. Buy or get a sparkplug tester (st-125) to test the coil. This tester will test the fire/spark like it is under a load.
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Old Jul 22, 2007 | 09:53 PM
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Originally Posted by johnnyzvette
check your spark plug wires carefully....I had a similar problem not too long ago, long story short, it ended up being my #6 cylinder spark plug wire was grounded to the exhaust manifold.....just my two cents.
Johnny , your the man! I just found plug wire thats been burnt through and a slight arch spot on the header. All you guys thanks for the responses. Love this forum!
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Old Jul 22, 2007 | 09:54 PM
  #24  
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Originally Posted by bobmic93
Johnny , your the man! I just found plug wire thats been burnt through and a slight arch spot on the header. All you guys thanks for the responses. Love this forum!
Woohoo something simple and cheap!!!
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Old Jul 23, 2007 | 10:53 AM
  #25  
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Originally Posted by bobmic93
Johnny , your the man! I just found plug wire thats been burnt through and a slight arch spot on the header. All you guys thanks for the responses. Love this forum!
Well done Bob. Now replace that O2 sensor and the fuel filter.
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Old Jul 23, 2007 | 11:53 AM
  #26  
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Originally Posted by bobmic93
My big shot buddy, Dom Sorresse who recently moved up to the ZR1 section is going to see if we can find the problem on his scanner. I should know more by Sat afternoon.
Now this is funny...

Glad you got it figured out Bob...
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Old Jul 23, 2007 | 09:13 PM
  #27  
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You need to open the hood more often, and be familiar with what's there, and with what looks normal.
You should have done the visual first, and use a flashlight and a mirror in all the dark and shady areas.
1. You should check the oil and water, brake fluid/clutch fluid, do a visual every two weeks if this is your daily driver.
2. You should be able to spot new oil accumulations, since oil attracts dirt.
3. be familiar with changing the yellow anti-freeze every year in the fall, and pull the radiator out and clean out the debris.
4. remember, every 4 years, belts and hoses.
5. be familiar with what fluids you have in the car, and what's compatible with what incase you are out in the boonies, and have limited choices.
6. put a tag or write on the battery when it was the last time you changed it. After 3 years, under a corvette hood, you are on borrowed time.
7. tires should be checked every month, even if it is to check the tread depth. You will also spot problems with suspension and balancing at the same time.
Sorry, it just seemed apropriate
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Old Jul 24, 2007 | 06:11 PM
  #28  
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awesome! I know it felt good to find the problem without throwing parts at it. Now get back to rippin' the roads.....
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