lt-1 engine problem
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Heel & Toe
Joined: Mar 2012
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lt-1 engine problem
I just pulled my 93 out of the shed after approx 10 years.. I changed the fuel & pump & it took a longtime to start but finally did. It,s running ver poorly. It seems to be missing. I put new spark plugs in w/no change in the performance. Any help would be appreciated.
Team Owner
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Heel & Toe
Joined: Mar 2012
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It seems that fixing anything on a corvette is a little tricky. Replacing the spark plugs was a real chore! I,ll get after changing the filter. Do you recommend cleaning the injectors with a cleaning kit or just add sea foam / lucas etc. to the tank?
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Thread Starter
Heel & Toe
Joined: Mar 2012
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Today I completely drained the fuel tank again & did a major inside cleaning of it.I also changed the fuel filter, now I can check those off of the list. I poured seafoam into the brake vacuum hose while running to clean the injectors.It is still running bad, like it,s not running on all cylinders.There are no codes showing. Maybe it,s the injectors? I can,t afford to change all of them now so how do I check them to see if they are o/k? THNX
Melting Slicks
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Today I completely drained the fuel tank again & did a major inside cleaning of it.I also changed the fuel filter, now I can check those off of the list. I poured seafoam into the brake vacuum hose while running to clean the injectors.It is still running bad, like it,s not running on all cylinders.There are no codes showing. Maybe it,s the injectors? I can,t afford to change all of them now so how do I check them to see if they are o/k? THNX
The engine miss may be related to something in the Optispark getting corroded after all those years of sitting. As others will say, the best thing you can do for these cars is drive them.
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Heel & Toe
Joined: Mar 2012
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I will not take advice from the parts counter guy on seafoam anymore! Can I unplug one injector at a time while running to see what effect it has on that cylinder similar to removing one sparkplug wire at a time?
Instructor
Joined: Aug 2010
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From: Asheboro North Carolina
Today I completely drained the fuel tank again & did a major inside cleaning of it.I also changed the fuel filter, now I can check those off of the list. I poured seafoam into the brake vacuum hose while running to clean the injectors.It is still running bad, like it,s not running on all cylinders.There are no codes showing. Maybe it,s the injectors? I can,t afford to change all of them now so how do I check them to see if they are o/k? THNX
http://fuelinjectorconnection.com/shop/
Le Mans Master
Joined: Feb 2000
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From: Epping NH
http://temp.corvetteforum.net/c4/bac522/technical.htm
Ouch why would you let a vette sit for 10 years?
Ouch why would you let a vette sit for 10 years?
Le Mans Master
Joined: Jan 2006
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From: Woodstock Georgia
John is a good guy and customer service next to none. Now a question - did you use a noid light and check injector pulse? Do NOT use a test light, noid is the only way to do it right.
Instructor
Joined: Aug 2010
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From: Asheboro North Carolina
One more suggestion. Get a fuel pressure gauge. I bought one but you may be able to get a loaner from Advance, Auto Zone or other parts house that has a loaner tool program. Fuel pressure should be above 38 lbs and it's easy to check.
Racer
Joined: Sep 2007
Posts: 393
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From: Bartonville Illinois
1993 help
WLRDLR,
You can actually hear your injectors working with a mechanics stethoscope. They make a clicking sound.
Unfortunately they could be dirty enough that your spray pattern is bad and would require new ones or removal and a real cleaning.
Like someone else said earlier, who knows the condition of the opti after all that time. May be something growing in there. I would not expect the wires to be worth much either.
You can actually hear your injectors working with a mechanics stethoscope. They make a clicking sound.
Unfortunately they could be dirty enough that your spray pattern is bad and would require new ones or removal and a real cleaning.
Like someone else said earlier, who knows the condition of the opti after all that time. May be something growing in there. I would not expect the wires to be worth much either.