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Classic Truck Discussion Board |
Re: Re: '78 Chevy K-10 blues (Roch. Carb)
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Posted by Bob S. on December 21, 2004 at 12:58:54 from (12.149.228.84):
In Reply to: Re: '78 Chevy K-10 blues (Roch. Carb) posted by Bob M on December 21, 2004 at 05:52:17:
OK, that makes sense. :D Thank you for your post.
One of the problems I'm fighting is that the truck had been worked on by several people in the past. What I don't know is how many corners were cut to get it running (vacc., arms and jets adjusted out of spec., etc.).
When it acted up last year, I parked it until the summer when I stripped and cleaned the carb. The gaskets and float/needle looked good but the "pot" (bellows?) for the choke pull-off was very loose in its bracket. I was able to fix that by drilling some small holes in the bracket (one of the ears had broken off) and using wire to lock the pot into the bracket.The truck ran fine until it got cold again.
I've already installed a new rebuild kit but I didn't replace the pull-off.
BTW, anyone have a diagram that shows what the vacc. lines should look like? The heat riser that bolted to the header has long since rotted away and the lines were changed to by-pass the butterfly in the air cleaner inlet. I think I can live without the hot air ducting (I have found the metal "hose" that attaches between the air cleaner and the riser at LMC, but no luck finding the riser itself), but I'd really like to see what should be plugged in where. ;-)
One last thing- I remember from an old Caddy that a blocked EGR/PCV valve can cause problems. I don't remember if it was choke related.
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