If the malfunction indicator lamp (MIL) turns on and DTC P1345 sets after installing the distributor, this indicates an incorrectly installed distributor.Engine damage or distributor damage may occur. Use Procedure 2 in order to install the distributor.
This is EXACTLY what I was looking for! Thank you for posting up!
My father and I recently replaced the Intake Manifold Gasket on his 4.3L equipped 2002 S10 2WD, to fix its Coolant Consumption Problem. With 94K on the clock and the Factory Original Equipment still in place, we also performed a full Tune Up (Plugs, Wires, Cap & Rotor Set, and new Fuel Filter), thinking this would alleviate its Hard Starting issue as well. Upon completion, the Truck seems to be no longer loosing Antifreeze and it runs like a champ, but the Hard Start Problem remains and we now have a PO1345 Code. I'd replaced a couple of Intake Gaskets on these 4.3L's in the past without any problem, so this DTC is new to me.
I distinctly remember re-installing the Distributor. The Rotor was not pointing exactly
where it had prior to its removal, although it was close. My thinking was that the Oil Pump Drive at the bottom of the Distributor meshes with the Oil Pump like a Flat Head Screwdriver: One of two ways. Either the way it came out or 180* off. I thought I couldn't f*ck it up if I was close. I guess I was wrong and I'd just gotten lucky in the past thinking "Close" is good enough.
I have a question though. Is it completely necessary to go through the entire 2nd Procedure to rectify this problem? I am certain that I know the relationship between where the Rotor was pointed when the Distributor was removed compared to where I installed it. (I need to move it one tooth counterclockwise.) Couldn't I simply remove the Distributor, adjust the Oil Pump Drive Mesh, and replace the Distributor back to its "Original" Position?
Again, thank you for posting this procedure. I've already printed it off to add to my Service Manuals in the Shop.