It all started six months ago when my opti spun the rotor, so I decided that I would just get a whole new one but not a delco one. Switched it out 2 months later that one went bad..so swapped it out again that one went bad 1 month later..so i said I'm just going to bite the bullet and buy a delco one installed it about 2 weeks ago woke up this morning and BOOM NO START!!! Checked for spark there was none..brand new ICM I purchased 1 month ago from autocrap...I have no idea what is happening with my opti's?? Anyone help

 

Are you absolutely positive you are installing them correctly? Cam dowel pin set to the correct length?

 

Dowel pin set to correct length? The pin sits in the cam as it has since I purchased it..never pulled or pushed the pin in or out..after every install car runs excellent..I don't know why it's just keep failing on me...oh wait let me correct myself here first 2 Optis the rotors spun loose so had a warranty swapped it out lock tight on the rotors and then the optical sensors are the ones taking a crap.

 

Finally got my computer on there and the infamous code 16 low resolution opti failure!!!

 

I will never use anything, but AC Delco electrical stuff on an LT1. I had an advanced auto ICM that kept failing and overheating. The car would stall intermitantly and it would have to cool off before it would start back up. This went on for a few months and finally it just died. Bought an AC Delco one and never had a problem again. Also I have never used anything but an AC Delco Opti so I have no experience with one of those. Good luck, what year is the LT1 from?

 

It's a 95 lt1..but after researching about the dowel pin and according to shoebox comp cams are notorious for putting the wrong size dowel pins in there cams and looking at my old opti I can see that the dowel pin was bottoming out on the opti which is causing it to break..now the reason this was overlooked was because of this horrible machine shop that half assed my engine together and not taking there time to correctly build my engine..this is not the first problem these guys installed my harmonic balancer without checking the correct fitting causin my balancer to fly off in turn breaking my double roller timing chain and bending all of my pushrods!!! There name will be plastered all over this forums and others to be sure for no one to take there engines there!!!

 

http://shbox.com/ci/cam_install.html

 

Fix the pin length and I can tell you with certainty that it will solve your opti problems.