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

the 93 quit today

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Old Oct 19, 2007 | 12:04 AM
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Default the 93 quit today

I filled the tank on my 93 today and about 2 miles later the car died and would not restart. my first thought was water in the fuel. I had it towed home and checked the fuel and it looks clean and the pressure is 40 psi. here is my thoughts about 6 weeks ago I got caught in a severe downpour and the roads flooded I drove into a street that had about 6 inches of standing water and the car stalled out. I got it restarted and moved it to higher ground. I went back after the rain and it started right up but the opti must have got wet to stall it. all was fine until today when it just died out for no reason. my opti may have died, will they do this? it only has about 1500 miles on the opti
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Old Oct 19, 2007 | 12:50 AM
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I would say you Opti is going out again. Try to dry the Opti with whatever means you have to get good dry air down there. It doesnt take much to get our 93 ruined. I eventually went vented style, then finally just went DELTEQ. I took the opti apart, cut the rotor off, loctited it down, then sealed the **** out of it with RIGHT STUFF rtv.
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Old Oct 19, 2007 | 02:22 AM
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If you have fuel pressure, make sure the injectors are pulsing and that you have spark at the plugs.
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Old Oct 19, 2007 | 02:32 AM
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yes an opti will just die. Or a slow death. Since you tested fuel, you need to look for spark. Maybe someone can crank it over while you watch for spark from a plug wire to a ground.
I also ended the opti with a Delteq set up.
Now the opti is just an - opti - no spark needed !

Good luck -
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Old Oct 19, 2007 | 08:58 AM
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Default got spark

I have spark to the plugs and the only code that I get is code 12 the fsm does not list that code. is just a proveout code?
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Old Oct 19, 2007 | 09:33 AM
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gator, C-12 is when you've got no codes stored in the CCM. If it was the Opti you would get H-16, Optispark low resolution or H-36, Optispark high resolution.
Note that the 92/93 codes come up as "H", history usually after after the event occurs and you have cycled the ignition switch.
Sounds like the Opti's working.
You can get the complete code list at C4guru.com.
I haven't seen an Opti go totally dead (no spark)without throwing a code. I have seen Opti's get crappy ( missing,etc.) without throwing a code.
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Old Oct 19, 2007 | 09:47 AM
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If the Opti has water in it, or is dying you dont always get a spark, or the spark sent out at the right time. Out of all the Optis I have lost, and the friends I have changed, we never had a code.
The optical sensor is very sensitive to water/moisture and throws its acurracy off.
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Old Oct 19, 2007 | 11:15 AM
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Originally Posted by steve40th
If the Opti has water in it, or is dying you dont always get a spark, or the spark sent out at the right time. Out of all the Optis I have lost, and the friends I have changed, we never had a code.
The optical sensor is very sensitive to water/moisture and throws its acurracy off.
possibly I just tried with some ether and did not even get it to kick or sputter. myspark may be intermittent or weak
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Old Oct 19, 2007 | 02:05 PM
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I should have stayed with my first hunch. it is the fuel. it is contaminated with some type of oily substance. possibly diesel.
I took a sample and poured a little on the cement and lit it to see if it would burn. it burns with a heavy black smoke then goes out and there is a residue left that is oily and will not burn. I tested some good fuel and it does not hardly smoke and it burns completely and leaves no residue. this explains the no start because it has fouled the plugs and continuing to crank on it just dumped even more on the plugs. I sent my estimate to Valero the fuel company and I will see what happens
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Old Oct 19, 2007 | 06:16 PM
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Good luck with Valero, we had one of our foreman pump 26 gals of gasoline into a Dodge Cummins in FT. Meyers Fl. The reciept clearly showes the total number of gallons of deisel, even though it was really gasoline in their deisel fuel tank. $6200.00 dollars later and the truck is back on the road, still fighting in court with them and it doesn't look good for us.
Good luck.
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Old Oct 19, 2007 | 07:03 PM
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Originally Posted by genefree3
Good luck with Valero, we had one of our foreman pump 26 gals of gasoline into a Dodge Cummins in FT. Meyers Fl. The reciept clearly showes the total number of gallons of deisel, even though it was really gasoline in their deisel fuel tank. $6200.00 dollars later and the truck is back on the road, still fighting in court with them and it doesn't look good for us.
Good luck.
I faxed them my estimate today, gave them 3 hrs and no call back so I called at 3 pm and they said the claims dept leaves at 3 pm on Friday and does not return until Monday WTF so I am left just waiting until Monday. suppose this was my only transportation. it does appear to be deisel in the fuel.
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Old Oct 19, 2007 | 07:08 PM
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They're telling us its our fault for not checking to be sure it was diesel. When he filled up truck the pump was deisel only, now acourse they have changed pumps and there are two hoses for gas and one for deisel in the same unit. Fortunatly, yours is gas and not a deisel engine, you can iminage the damage we had after about 30 miles.
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Old Oct 19, 2007 | 07:20 PM
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Originally Posted by genefree3
They're telling us its our fault for not checking to be sure it was diesel. When he filled up truck the pump was deisel only, now acourse they have changed pumps and there are two hoses for gas and one for deisel in the same unit. Fortunatly, yours is gas and not a deisel engine, you can iminage the damage we had after about 30 miles.
are you suppose to sample the fuel before you fill up?????
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Old Oct 19, 2007 | 07:21 PM
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I would think you would be ok if you drained all the diesel out of your tank and changed the plugs. Maybe run some cleaner in the fuel system to clean out the injectors. If the injectors are screwed, i'd make them pay.
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Old Oct 19, 2007 | 07:26 PM
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I guess, its a standing joke in company now, "whoever smokes checks hose with lighter" What amazes me is if one of my men made a mistake and did some serious damage on one of the jobs we work on. My boss would be the first to step foreward and fix/replace the damage.
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Old Oct 19, 2007 | 07:30 PM
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Originally Posted by 4Ever21
I would think you would be ok if you drained all the diesel out of your tank and changed the plugs. Maybe run some cleaner in the fuel system to clean out the injectors. If the injectors are screwed, i'd make them pay.
fuel systems do not like oil, like in diesel. it makes the rubber components swell. I sent them an estimate for a new fuel pump and injectors along with removing the tank and cleaning the fuel system. it is not my fault it is contaminated with diesel
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Old Oct 19, 2007 | 07:45 PM
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All this and they have nerve to keep raising the cost per gallon

Just this week my local station went up .20

And when I use odd stations, the car runs crappy - no doubt diluted gas.
Good luck with it.
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To the 93 quit today

Old Oct 19, 2007 | 08:45 PM
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Don't forget the oil change and filter since you washed down cylinder walls with deisel fuel. I had the oppertunity to watch a low life steal 2- 5 gallon cans of deisel fuel out of my transfer tank in Miami. One of the guys with me wanted to stop him, I said no. I let him go ahead and top off his Caddy!
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Old Oct 19, 2007 | 11:06 PM
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Originally Posted by genefree3
Don't forget the oil change and filter since you washed down cylinder walls with deisel fuel. I had the oppertunity to watch a low life steal 2- 5 gallon cans of deisel fuel out of my transfer tank in Miami. One of the guys with me wanted to stop him, I said no. I let him go ahead and top off his Caddy!
that was on my list also, my Mobil one might have 200 miles on it
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Old Oct 22, 2007 | 02:11 PM
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Originally Posted by genefree3
Good luck with Valero, we had one of our foreman pump 26 gals of gasoline into a Dodge Cummins in FT. Meyers Fl. The reciept clearly showes the total number of gallons of deisel, even though it was really gasoline in their deisel fuel tank. $6200.00 dollars later and the truck is back on the road, still fighting in court with them and it doesn't look good for us.
Good luck.
I got pretty much the same response. they claim their fuel had no problems that day and no other claims, I wonder how many people they tell that to. so i spoke to his supervisor and they should be calling me back (yea right) meanwhile I called the agriculture commision who regulates fuel sales in our state and they were at my house in less than an hour and took a sample from my car to have it analyzed and also went to the station and had samples taken from every one of their tanks. hopefully they still have some of the fuel I got last thursday. my next step is an attorney although I would would prefer not to go that way. if you have a problem have the ***** to admit it or prove otherwise
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