Is this the new normal for parts.....ie Vortec dist. cap

[legendman]

So new distributor, cap and rotor and still runs like crap.
Seems like when it goes into lockup it is the worst, bucking and sputtering.

[legendman]

Originally Posted by legendman

So new distributor, cap and rotor and still runs like crap.
Seems like when it goes into lockup it is the worst, bucking and sputtering.

Update.
I got the P1345 code after changing distributor.
Cleared that and fixed by using this method.

Teeny bit of misinformation here . . . First of all, there is a way to do this with an affordable scanner that just clears codes, and secondly, a P1345 code does not always indicate an improperly installed distributor, so try a couple things before you start yanking your distributor. It could just be 8-10 degrees off. Anything more than +/- 2 degrees from spec will trip the code. If you don't want to buy the $1000 2-way scanner, or don't want to pay a mechanic $250 to do this adjustment, here is what I did. Old school. You will need a scanner that can at least clear codes. Get the blue-tooth scanner/adapter (amazon) and pay the $2.99 for the "torque" app (the free one is lame) and you can get some basic real time info and reset codes etc. all for way under $25. First of all, if your distributor is 180 out, or a tooth or 2 off it won't run for **** or at all, and is another whole post. So let's focus on this specific situation: Reasonably installed distributor, running well, still throwing the 1645 code. Clear the code. Start the truck. Start a timer to see how long before the code is thrown. 4-6 seconds equals too far advanced. Loosen the hold down. Back it off 2-4 degrees at a time, repeating the code clearing/restart procedure. You will quickly find that there is a correlation between the quickness the code is thrown and how far advanced it is. As you back off and restart, it will take longer to throw the code (ie 8-12, 12-16 seconds) then voila, you will find the sweet spot. If I had the $1000 snapon scanner, I would be able to rotate the distributor in real time @ 1000 RPM and get it into spec (within -2 to 0 degrees I think). The above took me 15 minutes and now the 1645 code is gone forever. On down the road!

Stumbling and sputter is not as bad but still noticeable at light load throttle.

[1971 GMC SHORTY]

Well A Year later I just Hit 14000 miles it mines Still Running Strong Been Driving in rain On and off Last few Weeks Going to do Full Service This weekend, LOF Going to Pull Dist Cap Off And Check It, Hopefully I Don’t Jinks Myself But seeing it’s sunny In California Almost Year Around Maybe I’m Lucky!