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

Dead in the ditch

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Old Sep 28, 2008 | 12:32 AM
  #1  
banctecbobn's Avatar
banctecbobn
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Default Dead in the ditch

My 94 LT1 is broken down along the road in the ditch tonight. The car used over a half tank of gas to go just 2 miles.

How is this possible or is it possible?

The car suddenly started running very very rich. A fog of black smoke coming out of the pipes. I pulled the vacuum line from the fuel regulator and some gas came out. Well, I guess I'll need a new regulator but is it possible that much fuel could have passed thru the vacuum line???? Seems impossible to me but that is what the gas gauge is showing. It's late tonight and it will be morning before I can head out to get my car. Any ideas other than the regulator? Anything else I should check?
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Old Sep 28, 2008 | 01:04 AM
  #2  
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Sounds like one of the injectors is stuck open. Best tow the car to where you can work on it.
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Old Sep 28, 2008 | 01:08 AM
  #3  
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Check your oil level also. Your oil pan may very well be full of fuel.
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Old Sep 28, 2008 | 10:57 AM
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Just got back from visiting my baby in the ditch.

Wow....I guess the regulator could pass that much gas thru the vacuum line. I disconnected the vacuum line again and turned the key. It shot a boat load of fuel out all over the engine bay. Looks like my regulator has more than just a leak.

And yes it looks like I have fuel in the oil.
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Old Sep 28, 2008 | 11:15 AM
  #5  
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Don't turn it over anymore till you fix the problem and change the oil and filter. Hopefully you didn' scour the cylinders.
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Old Sep 28, 2008 | 11:19 AM
  #6  
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Originally Posted by MK 82
Don't turn it over anymore till you fix the problem and change the oil and filter. Hopefully you didn' scour the cylinders.
If you have fuel in the block get it towed home. You ruptured the diaphram in the FPR and instead of metered gas into the intake via the injectors you are dumping it via the hose. Very easy to replace the FPR but not to rebuild the engine.
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Old Sep 28, 2008 | 11:28 AM
  #7  
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I had an aftermarket regulator go bad and yes, they can pump TONS of fuel through the vacuum line in short order. DEFINITELY change the oil out before cranking the car. I'm not sure about the LT1's but on my L98, I pulled the coil wire off the distributor and cranked it for about 20 seconds after changing the oil so it didn't fire up with washed down cylinder walls. Maybe you can do the same to ensure oil is on the walls before it fires.
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Old Sep 28, 2008 | 11:39 AM
  #8  
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And it likely ruined your o2 sensors and catalytic converters.
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Old Sep 28, 2008 | 04:44 PM
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Pull the fuse for the fuel pump. The FP will keep the line pressurized pouring gas through the open injector into the block. Buy a case of cheap oil. Change oil. Unplug the distributor and turn over to get gas out of oil pump. Do it 3 or 4 times. I still have a 5 gal can of gas/oil mix.

I've been there.
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