Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

If your mid 80's truck hesitates...

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by BlazerWheels, Dec 1, 2003.

  1. BlazerWheels

    BlazerWheels 1/2 ton status

    Joined:
    Feb 13, 2003
    Posts:
    587
    Likes Received:
    0
    Location:
    California
    If your mid 80\'s truck hesitates...

    You might want to remove the Charcoal filter in your Air cleaner. I took mine out yesterday, and it is like a whole new truck. /forums/images/graemlins/eek.gif It is actually getting enough air now!!! /forums/images/graemlins/thumb.gif Go figure. Just thought I'd pass this on...
     
  2. tecton

    tecton 1/2 ton status

    Joined:
    Dec 1, 2002
    Posts:
    1,553
    Likes Received:
    0
    Location:
    WV
    Re: If your mid 80\'s truck hesitates...

    whats it look like
     
  3. BlazinRojo

    BlazinRojo 1/2 ton status

    Joined:
    Mar 29, 2001
    Posts:
    111
    Likes Received:
    0
    Location:
    San Luis Obisbo, CA
    Re: If your mid 80\'s truck hesitates...

    will I still pass emissions without the charcoal air filter?
     
  4. BlazerWheels

    BlazerWheels 1/2 ton status

    Joined:
    Feb 13, 2003
    Posts:
    587
    Likes Received:
    0
    Location:
    California
    Re: If your mid 80\'s truck hesitates...

    [ QUOTE ]
    will I still pass emissions without the charcoal air filter?

    [/ QUOTE ]

    Hope So!!! Last time mine was smogged they didn't look...

    It looks like a air filter that is inside the paper air filter...it is a metal screen with charcoal sandwiched in between.

    It made a total /forums/images/graemlins/thumb.gif difference on mine!!!!
     
  5. pauly383

    pauly383 Daddy383 Staff Member Moderator

    Joined:
    Jul 22, 2001
    Posts:
    16,217
    Likes Received:
    1
    Location:
    Mesa , Arizona USA
    Re: If your mid 80\'s truck hesitates...

    My truck only hesitates when cold , and I know the solution. I give myself five minutes to warm up truck. Just sit and wait for the choke to unload when you blip throttle, and viola! No hesitant Q-Jet. just like all the old timers( I'm young but brought up right) remember.
     
  6. imiceman44

    imiceman44 1 ton status

    Joined:
    Aug 5, 2002
    Posts:
    15,160
    Likes Received:
    1
    Location:
    Sacramento, CA
    Re: If your mid 80\'s truck hesitates...

    [ QUOTE ]
    You might want to remove the Charcoal filter in your Air cleaner. I took mine out yesterday, and it is like a whole new truck. /forums/images/graemlins/eek.gif It is actually getting enough air now!!! /forums/images/graemlins/thumb.gif Go figure. Just thought I'd pass this on...

    [/ QUOTE ]

    I will try it.
    Mine does that and even when warmed up.
    Changed the air filter and t didn't help.
    I am smogging it this week and then i will remove it and see the difference.
    /forums/images/graemlins/thumb.gif
     
  7. BlazerWheels

    BlazerWheels 1/2 ton status

    Joined:
    Feb 13, 2003
    Posts:
    587
    Likes Received:
    0
    Location:
    California
    Re: If your mid 80\'s truck hesitates...

    [ QUOTE ]

    I will try it.
    Mine does that and even when warmed up.
    Changed the air filter and t didn't help.
    I am smogging it this week and then i will remove it and see the difference.
    /forums/images/graemlins/thumb.gif

    [/ QUOTE ]

    Ice...Mine used to do it when it was warm also...Truck idols smoother and runs better now!! Try to watch when they are testing it to see if they check for it or not. Then could you let me know??? Thanks. /forums/images/graemlins/grin.gif
     
  8. R72K5

    R72K5 Banned

    Joined:
    Mar 5, 2001
    Posts:
    8,905
    Likes Received:
    0
    Location:
    central IL
    Re: If your mid 80\'s truck hesitates...

    they astarted using these air cleaners in at least 82 with the 5.0L with electronic spark timing system in the K10 trucks i know, and with at least the 700r4

    i though it was just a screen in there but ive never looked really super close at one even though i have a couple of these cleaners laying around

    hmm..

    good luck
     
  9. 84_Chevy_K10

    84_Chevy_K10 Banned

    Joined:
    May 30, 2001
    Posts:
    17,669
    Likes Received:
    0
    Location:
    IL, USA
    Re: If your mid 80\'s truck hesitates...

    [ QUOTE ]
    You might want to remove the Charcoal filter in your Air cleaner. I took mine out yesterday, and it is like a whole new truck. /forums/images/graemlins/eek.gif It is actually getting enough air now!!! /forums/images/graemlins/thumb.gif Go figure. Just thought I'd pass this on...

    [/ QUOTE ]

    You might want to ditch your ESC setup if it's still there, too!!
     
  10. BlazerWheels

    BlazerWheels 1/2 ton status

    Joined:
    Feb 13, 2003
    Posts:
    587
    Likes Received:
    0
    Location:
    California
    Re: If your mid 80\'s truck hesitates...

    [ QUOTE ]

    You might want to ditch your ESC setup if it's still there, too!!

    [/ QUOTE ]

    ???? Could you explain a little more??? /forums/images/graemlins/ears.gif
     
  11. btolenti

    btolenti 1/2 ton status

    Joined:
    Sep 28, 2003
    Posts:
    644
    Likes Received:
    0
    Location:
    Gilroy, CA
    Re: If your mid 80\'s truck hesitates...

    I think the ESC is a SMOG requirement....
     
  12. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

    Joined:
    Aug 28, 2002
    Posts:
    9,097
    Likes Received:
    144
    Location:
    california
    Re: If your mid 80\'s truck hesitates...

    [ QUOTE ]
    [ QUOTE ]

    You might want to ditch your ESC setup if it's still there, too!!

    [/ QUOTE ]

    ???? Could you explain a little more??? /forums/images/graemlins/ears.gif

    [/ QUOTE ]
    Tim is just being Tim, it is the electronic spark control and it is controlled by a computer that makes the distributer advance, it also controls the carb at idle. You cannot get rid of this unless you have a vacuum advance distributer and another carburetor to use. I have done this with mine but I don't really think you gain a lot and it causes a big smog problem because it is not a legal swap in Cali.
     
  13. 84_Chevy_K10

    84_Chevy_K10 Banned

    Joined:
    May 30, 2001
    Posts:
    17,669
    Likes Received:
    0
    Location:
    IL, USA
    Re: If your mid 80\'s truck hesitates...

    [ QUOTE ]
    [ QUOTE ]
    [ QUOTE ]

    You might want to ditch your ESC setup if it's still there, too!!

    [/ QUOTE ]

    ???? Could you explain a little more??? /forums/images/graemlins/ears.gif

    [/ QUOTE ]
    Tim is just being Tim, it is the electronic spark control and it is controlled by a computer that makes the distributer advance, it also controls the carb at idle. You cannot get rid of this unless you have a vacuum advance distributer and another carburetor to use. I have done this with mine but I don't really think you gain a lot and it causes a big smog problem because it is not a legal swap in Cali.

    [/ QUOTE ]

    I wasn't aware that the ESC computer was hooked to the carb as my rig is/was federal emission. I didn't know that the two were related.

    My ESC computer shorted out somehow and cut ALL spark to my rig. This was long before I knew of this messege board back in '00 so I went to the junkyard, got a regular 4 pin HEI distributor for $35 and dropped it in. It served me well until the engine blew up, breaking the cam in three pieces and destroying it. I've since replaced it with another used unit that I curved.

    Either way, it's not just me being myself. I ditched the ESC out of necessity. If it does indeed tie into the CCC, I'd leave it. I wouldn't know because, as I said before, my truck is a federal emission model.

    And by the way, the computer for ESC doesn't make the distributor advance. It retards your timing when it hears knock. It is capable of an insane amount of retarding too, something like 40*.
     
  14. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,982
    Likes Received:
    191
    Location:
    Roy WA
    Re: If your mid 80\'s truck hesitates...

    That's because those 9.2:1 305's used terrible heads and 87 octane, and the only way to make sure the engine didn't come back under warranty was to ensure it couldn't kill itself. IE advance retard via a computer.

    Don't know if any Federal 350's got the ESC setup or not, but AFAIK, no 350 had that high compression.
     
  15. btolenti

    btolenti 1/2 ton status

    Joined:
    Sep 28, 2003
    Posts:
    644
    Likes Received:
    0
    Location:
    Gilroy, CA
    Re: If your mid 80\'s truck hesitates...

    my 86 cali-emissions k-5 doesn't have ESC! But it does have the 7 pin ignition module HEI...
     
  16. pauly383

    pauly383 Daddy383 Staff Member Moderator

    Joined:
    Jul 22, 2001
    Posts:
    16,217
    Likes Received:
    1
    Location:
    Mesa , Arizona USA
    Re: If your mid 80\'s truck hesitates...

    My Blazer came with ESC distributor, still works, in a box in garage.mHowever the original matching number carb I still have in a box was not computer controlled. My truck also has a spot on the fuse box for some stuff that does not exist on my truck. I also have never found a computer in my truck ( had all dash and kick panels out ). My truck is native to Arizona and I bought it documented with 88,000 miles .
     
  17. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,982
    Likes Received:
    191
    Location:
    Roy WA
    Re: If your mid 80\'s truck hesitates...

    CA setups are typically CCC, and the ESC is integral with that system, not standalone like the non-CCC truck apps. Timing is completely controlled by the system, not just retard.
     
  18. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,982
    Likes Received:
    191
    Location:
    Roy WA
    Re: If your mid 80\'s truck hesitates...

    ESC computer is mounted in the same place as the CCC and TBI ECM's, from what I've seen. Pull the glove box, there will be a box mounted to the underside of the dash, above the heater box.
     
  19. pauly383

    pauly383 Daddy383 Staff Member Moderator

    Joined:
    Jul 22, 2001
    Posts:
    16,217
    Likes Received:
    1
    Location:
    Mesa , Arizona USA
    Re: If your mid 80\'s truck hesitates...

    I'll look there for the computer box. So if this is standalone there would be nothing on fuse box that says ECM?
     
  20. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,982
    Likes Received:
    191
    Location:
    Roy WA
    Re: If your mid 80\'s truck hesitates...

    Can't really answer that. My mid-80's fuse block (from a diesel) has a spot marked "ECM", but obviously nothing in that place. There could even be a wire plugged into one of the "auxiallary" terminals on the fuse block running to the ESC computer, but without a wiring diagram, or tracing the wires, it's going to be fairly difficult to figure out.

    But with a multimeter, you should be able to compare wiring color at the ESC computer, then over at the fuse panel, and test for continuity.
     

Share This Page