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LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Engine hesitation/buck/misfire?

   
Old Aug 21, 2010 | 08:40 PM
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Rob94hawk
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I would say it's the optispark but until you get it scanned we are all guessing.
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Old Aug 21, 2010 | 08:44 PM
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I would hope not . I've spent at least 3,000 bucks in the last month on this car. Everything decided to go at once.
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Old Aug 24, 2010 | 09:28 AM
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Got the car checked out.











wait for it..













Optispark! yay , any recommendations?
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Old Aug 24, 2010 | 11:15 AM
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Recommendation: stick with a genuine GM unit.
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Old Aug 24, 2010 | 11:26 AM
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This? http://www.summitracing.com/parts/ACF-1104032/

or this?

http://www.summitracing.com/parts/ACF-10457702/

Thanks for your help.
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Old Aug 24, 2010 | 12:56 PM
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You have a non-vented optispark, so you need the 10457702.
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Old Aug 24, 2010 | 01:49 PM
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Go with a good product, whatever you choose just dont try to go cheap on the part
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Old Aug 24, 2010 | 02:09 PM
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Would you say http://www.summitracing.com/parts/ACF-10457702/ is any good?
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Old Aug 24, 2010 | 02:14 PM
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Yes, that would be OK. Check Rock Auto for price comparison.
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Old Aug 24, 2010 | 02:28 PM
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Cant you change the opti into a vented style?
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Old Aug 24, 2010 | 02:39 PM
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Yes, but you need a slew of other parts to do so, most importantly a new camshaft.
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Old Aug 24, 2010 | 02:55 PM
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well now would be the time to do it, lol
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Old Aug 24, 2010 | 07:25 PM
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Best price I found. http://www.amazon.com/ACDelco-104577...2695916&sr=1-1


3 left..
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Old Aug 24, 2010 | 08:20 PM
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Eh, I think that one may be remanufactured actually..
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Old Aug 24, 2010 | 08:55 PM
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Originally Posted by RamAir95TA
Yes, but you need a slew of other parts to do so, most importantly a new camshaft.
I don't think this correct. The later opti is driven by the cam pin so the center bore diameter of the cam is a non-issue.
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