LT1 no start
 

Testing today at Milan...After second pass, clicked motor off after finish line. When I went to start it on return road, would not start.
Did a quick test before loading it up. Has spark at coil wire but no spark at plugs.
Checked ECU fuse....was OK. Several threads on here discuss rotor "slinging blades". Should the cap/rotor be my next step in the investigation process or are there any other possible causes.
I replaced the cap/rotor earlier this year and it is a pain in the a-- to change. Any ideas appreciated.
Thanks,
John

Re: LT1 no start
 

I broke 3 rotors before I started to pin them. They would always break on shutdown.

Re: LT1 no start
 

What happens is, the two small plastic pegs that the two pieces of the metal blade on the rotor in place break. If your lucky, that is all that tore up. May need a new cap also.
I drilled the two small plastic pegs holding them on a stock rotor with a 1/8" drill, ant put them back on with two long 1/8" pop rivets. Made several 8000+ RPM passes that way with zero problems.

Since then, MSD came out with a cap and rotor. They use two brass screws to hold it together. Might check into that. Pretty red parts.

Re: LT1 no start
 

Thanks Dyno and Ed.

Re: LT1 no start
 

Dyno posted his while I was trying to type mine.
Sorry.

Re: LT1 no start
 

No problem, Ed. Thanks for responding.
I will likely get it apart tomorrow, so I'll let you guys know what I find.
For info, is the correct MSD part number 84811 for the cap and rotor kit for the 98 LT1 ?
John

Re: LT1 no start
 

84811 is for 95-97 LT1's which are vented and have are pin driven. The other opti for pre 95's is spine driven and non vented.

Re: LT1 no start
 

Thanks Rob, Mine is of the 95-97 vintage,
Also, Dyno and Ed.......your diagnosis was right on. The rotor is shattered and it banged up the cap as well.
Thanks for your help.
John

Re: LT1 no start
 

I would break one and bring it back to the dealer for a new one the next Monday. After three times, they would not warranty it any longer, so I had to fix it. Glad you found it. Dyno

Re: LT1 no start
 

Before I got my Bowtie block, and got rid of the Opti (I had a crank trigger, and only used it for the cap & rotor) I finally had a shaft bearing come apart. Tore up everything inside. I don't know that a Stocker would have that problem. I would imagine another 1000/1500 RPM would effect that. I have been told MSD has a better bearing on the shaft in their Optispark, but do not know that for certain.