LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Optispark problem

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Old Sep 9, 2010 | 08:45 PM
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Default Optispark problem

I took my optispark off and put it back on and now it doesn't start can it be 180 off??
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Old Sep 9, 2010 | 08:52 PM
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More details needed to give you a better diagnosis, but it is possible to index the spline drive incorrectly. Why did you take it off and put it back on?
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Old Sep 9, 2010 | 09:03 PM
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II took it of cause my car was banging out like at 5,500-6,200 and losing power so it wasn't the coil or ignition module but after I took it off I noticed that the connector for the opti had wires that were bare so I put a new connector on it
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Old Sep 9, 2010 | 09:05 PM
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It's the second gen opti also
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Old Sep 9, 2010 | 09:09 PM
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isnt it keyed on the block side and opti side? That would make it tough to 180 unless you spun the opti side by hand? Also assume its spinning but no fire?

All i know is i feel for ya. I almost didn't make the LTX Shootout because of this...ended up being the ICM instead.
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Old Sep 9, 2010 | 09:14 PM
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What do you mean by keyed on th block side or opti
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Old Sep 9, 2010 | 09:15 PM
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Silly question. Is it possible with the bare wires the fuse blew? I would check the obvious first. Check the fuses and move on after that.
See the attached link. I also recall the unit can only go in one way.
Hope this helps.
Mike

http://www.corvetteactioncenter.com/...optispark.html
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Old Sep 9, 2010 | 09:20 PM
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Originally Posted by Disturbed 71
Silly question. Is it possible with the bare wires the fuse blew? I would check the obvious first. Check the fuses and move on after that.
See the attached link. I also recall the unit can only go in one way.
Hope this helps.
Mike

http://www.corvetteactioncenter.com/...optispark.html
Thanks but could the fuse go out even if it ran fine before I took it apart
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Old Sep 9, 2010 | 10:23 PM
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Default Fuse

If you had the key on at any time and the chaffed wire was a voltage wire, if it touched any chassis ground the fuse would blow. It anly takes a second to check. Did the unit go in easy or did you have to force it. I'm not sure if you can install it out of phase. Only goes one way. You can also check with a test light and see if you have a 12v at the harness. Also check to see all related wiring near where you worked did not get pinched in any way. Been there. I seen an apprentice at my work install an engine in an S10. completely pinched the main engine harness between the engine and trans. Somehow he still managed to draw the engine and trans together with the trans bolts. It was a real mess. lol, his big bad. Check the fuses and re post.
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Old Sep 11, 2010 | 02:39 PM
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Originally Posted by 94firehawk
What do you mean by keyed on th block side or opti
this pinion that drives the opti has a notch in it that only allows it to go in one way on both sides...i believe, and the more i remember from my install, the less i believe you can get it wrong if it goes in and seats.
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