I don't have any experience with this motor. My specialty is GM 2.5, 2.2, and 6.5 TD. Ford 4.0 SOHC, and Mopar 3.9. This probably gives away where I work I'm sure. Haha. And why I'm not up to date on things.

 

KOER it should be 0.0 +/- 2.0. turn distributor until you get close. Then raise above 1500 and let idle each time for fine tuning. Sounds like you may be off a tooth.

 

Well, on a positive note, the starter sounds much better with two bolts actually holding it tight. Ha.

 

 

P0200 is the cause of your misfire.
P1345 - is the cam sensor (distributor) plugged into wiring harness? If so, you are off a tooth on distributor.
Fix cam sensor retard and I think P0341 will go away.

 

P0200 factory diagnostic info is attached below.

I had an intermittent P0200 once. Turned out to be melted (grounded) wiring harness on front of passenger side exhaust manifold (after having the engine out and mis-routing the harness). Also you can check for bent over pins in main connector going into top of intake manifold (if P0200 is not intermittent). Someone may have been working on yours in the past and screwed up the pins.

Fuel Injection wiring diagram is attached below.
P0341 factory diagnostic info is attached below
P1345 factory diagnostic info is attached below
Enjoy!!!

p.s. Swartllk, if you see this, note that there is significant differences between this info and the P0341 and P1345 info in the DTC part of the Blazer site (especially the P1345 on site says CMP retard -5 to -17). Is this a year thing? I was just going to link to it, but seems to be incorrect, at least for 2001.

 

Thanks bunches, Les.

 

This is the setting that was showing the cmp at 56.3 degree's or whatever it was.

This is where I reset it. (Both balancer timing marks are lined up for both pictures. With it set here where it's supposed to be engine will not start. Acts like a normal distributor that is 180 out. ????!!!!

 

I have to put on my slotted dist. clamp and twist it to first picture position to get it to run.

 

So twist it past that position where it runs and see if cmp retard is reduced. You may have outer balancer ring slipped. It happens.