Quote Originally Posted by 2xls1 View Post
I can't say for sure on a V6 OS which I think you'll be using but for sure on 4.8, 5.3, 5.7, and 6.0 will run without a CMP signal. You can get an extended crank while the PCM figures out compression TDC. One thing is do not disable the DTCs for the CMP sensor. The PCM has to see the CMP code set for it to run without the signal. I've just never tested it on a vehicle with the CMP in the distributor. The V8s have the cam reluctor either directly on the back of the cam or up front on the cam gear.
I don't know if either a V6 or V8 using the '0411 with a distributor mounted CMP will run without a CMP signal, that theory of operation will need to be tested.

What I've learned from the dual trigger distributors I've built is the alignment between CMP / CKP is CRITICAL. If the distributor mounted CMP is not accurately aligned with the CKP, the engine will not start.

dave w