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74 blazer in need of somones assistance.

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by **DONOTDELETE**, Feb 24, 2001.

    i have a 74 blazer with a 2 yr old 350crate, and a 4brl holley carb. and the other day i was drivin along with no problems when at a stop light i noticed the car was idleing unevenly and smoking a little, about 10 miles down the road i let of the gas and the car cut off. It would absoloutely not start again unless i had it floored and even then it smoked something awful and ran like [censored] and unless i was giving it gas it would cut off again. however if i left it alone for about an hour it would start up just fine again but 10 miles down the road it would die again and do the same thing. HELP!!!! i think its got something to do with the carb. IF ANYONE HAS ANY ADVICE ITS MUCH NEEDED.!!!!!!!!
     
  1. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    Sounds like a choke problem.......what kind of choke do you have? It's probably stuck on. What color is the smoke you're seeing? Black means the engine's running too rich.

    <font color=red>PHOTO ALBUM-</font color=red> <A target="_blank" HREF=http://albums.photopoint.com/j/AlbumList?u=1289798>http://albums.photopoint.com/j/AlbumList?u=1289798</A>.......<font color=blue>TRUCK & HIKING PICS</font color=blue>
     
  2. Goose

    Goose 1/2 ton status

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    First of all, I cringed when you called it a car, twice, but anyway, it does sound like choke, at least carb related. I know my Holley hates to stay tuned right. Take some carb cleaner and clean it up good and make sure there is no binding in any of the linkage. As far as tuning it goes, Holley has a very informative web site.

    [​IMG]
     
  3. baldbandit

    baldbandit 1/2 ton status

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    I had a 454 that would just die while driving down the road. After cooling off, it would crank and run for awhile and die again. I don't remember if it smoked or not though. It took me awhile to figure it out. It ended up being the module in the distributor.

    baldbandit
     
  4. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Make sure you have no vacuum leaks. It does sound like the choke also. Another thing, THIS IS MY OPINION, put on Quadra-Jet carb. I hate Holleys. Q-J's are the simplest and best for an everyday driven vehicle. Those Holleys are mainly for power and hot rodding. Q-J's are more reliable and dependable. The Q-J's are easier to work with than Holleys. Again, THIS IS MY OPINION, anybody want to tell me where to stick it, well dont waste your time.
     
  5. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    You diagnosed your own problem HOLLY. Get the carb god intended to be on a GM Engine QUADRAJET. hehehe
    Sounds like your choke is stuck on. Not knowing if you have electric or not (probably do since factory crates come with an intake set up for electric) The element is about $35 bucks if it's a standard style. First thing to check is that the ckoke is getting 12v when engine is running. Could be a blown fuse of loose wire so check that first. Also check to see if the linkages are cruded up. might just need to be hosed down with some carb cleaner.
    Mark the choke element before you remove it and try to install the new one in the same location if you do find it's the element. Most times that's pretty close.

    Diging it in the dirt with my K5's
    Grim-Reaper
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  6. muddin4fun

    muddin4fun 3/4 ton status

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    Car?! Tis not a car my freind, tis a Blazer :) Take the holly off and put an edelbrock on it and 90% of your problems will go away. Holly....(shivering)...yuck!

    [​IMG] Keep your feet dry [​IMG]
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  7. AGM73k5

    AGM73k5 1/2 ton status

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    Two cheap parts to check, and things that solved my prob when my blazer was acting much the same way, are the fuel filter, and the fuel pump. When I checked mine I found rubber in the fuel filter and upon looking around the fuel pump I found that the hose was shot. May be worth a look before you buy a new carb :)

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