Does the 95 OBD1 cpu have a default knock setting if it's unplugged/wire broke? I get 6 degrees of retard at light load and it slowly goes away if I stay at the same load no matter what I change in the timing table. I have pulled 8 degrees across the board twice with LT1 edit and still 6 degrees. Now the car is a pooch.

Thanks,

J

 

I have heard that it retards the timing a set amount of degrees if there is a DTC for the sensor circuit, but I have not verified that, myself. Have any trouble codes?

 

No codes at all. I did a search and couldn't find any direct info for the problem I'm having. I do have all Comp valvetrain; Pro Magnum lifters, pushrods and 7/16 rockers, set the lash cold then hot and the car has 16 inches of vacuum at idle. It has the LT4 KM (nothing changed) and a Dynaspark . The timing was severely off with stock opti thanks to the shaft retaining screws losing thier heads. It is a new KM and I did use pipe tape to seal it and torqued it to 18ft lbs. If the signal wire was shorted to ground, it would throw a code right? The signal wire is running in the same loom as the ABS sensor and starter wires to get it away from the headers.

J

 

Yeah, if the wire was shorted to ground, it should cause a DTC. If you want to check that wire, it should have 5v on it with the key on and disconnected from the sensor.