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  1. Slooptin

    350 tbi idle speed

    It also has a code 34 but I suspect that's due to low vacuum and not a bad sensor/wiring, so I'm still back at trying to figure out why the vacuum is so low. Everything is pointing me to a mystery performance cam that a PO installed.
  2. Slooptin

    350 tbi idle speed

    I’ve got a timing light on order so I’ll check that. So far no vacuum leaks that I can detect. I’m aware that low vac is a bad thing so I’m trying to diagnose it. The truck also will occasionally “pulse” at idle where I’ll put it in park, the rpm’s go back up and then bounce up and down...
  3. Slooptin

    350 tbi idle speed

    Also worth noting that I tried to reset the IAC multiple times with two different sensors and every time i end up getting a crank/no start situation
  4. Slooptin

    350 tbi idle speed

    Ok, so I replaced the o2 sensor and re-sealed the injectors and it’s still wanting to die at idle. Could there possibly be a mystery cam in here causing it to want to idle so low? I’m searching for a vacuum leak today since I hooked up a vac gauge to a manifold port and it was reading like 10-12...
  5. Slooptin

    Failed CO emissions-high CO and HC

    Welcome from CO. I just moved up here and I'm working on getting my 90 burb emissions compliant. If you ever need a hand wrenching, give me a holler! I'm not an expert since I'm in your same situation right now, but you'll probably need to put the stock manifold back on, or at least one with an...
  6. Slooptin

    350 tbi idle speed

    Ya it does but I’ll probably replace that so as I’m about to add a cat back in to pass emissions
  7. Slooptin

    350 tbi idle speed

    So I’ve got this issue with my tbi 350. Normally at idle it’s around 700 at cold start in park and it drops down to about 400 in gear and will sometimes drop and rise and even die. I’ve replaced the iac valve and done the relearn procedure and still nothing. When I unplug the iac it’s fine...
  8. Slooptin

    Question about 1990 Suburban & emissions

    @Vbb199 Awesome, that's just what I'm looking for. I know the truck also has long tunes and true duals so I may be looking at a whole new exhaust system.... And I'm definitely interested in being able to read ecm live data so any help there would be great. I think I still have to do a sniffer...
  9. Slooptin

    Question about 1990 Suburban & emissions

    I'm moving to Denver/picking up a new-to-me 90 burb in the next week and I had a question about emissions. I'm buying the truck from a friend there who has it registered in a county that doesn't require emissions testing, but I'll be in the Denver metro area so I'll have to bite the bullet. I...
  10. Slooptin

    Broken valve guide boss/pillar

    It looks like it's part of the cast iron structure itself. I know the valve guides themselves are pressed in, but that extrusion that the valve seal slips over is broken off and that's what I'm worried about
  11. Slooptin

    Broken valve guide boss/pillar

    I know I’m going to need to get some machine shop work done on these heads I just snagged, but can they repair this valve guide boss/pillar that broke off? Or is there a way I could use a different seal for just this one valve?
  12. Slooptin

    Colorado K30 ownership

    So would I just need to retard timing and lean out the carb every year when I get tested?
  13. Slooptin

    Colorado K30 ownership

    Question for the Colorado folks on here: I'm currently daily driving my k30 here in Texas. Registration and inspection is easy and I don't think I get tested for emissions or anything, it's not registered as a classic or antique or anything. Is there anything I need to know before I move and...
  14. Slooptin

    Ls Swap Checklist

    Still haven't quite figured it out. I ended up putting the engine on a stand for the time being because I want to swap camshafts before the engine goes in the truck. plus this gives me an excuse to meticulously go through the wiring harness and label everything. I think I'll end up going with a...
  15. Slooptin

    6.5" speaker mounting options

    I'm in the process of re-doing the sound system in my crew cab and I was wondering where yall mounted 6.5" speakers. For reference, the truck came with a 4 channel amp and 2 10" powered subs. The amp was connected to 4 6.5" speakers and all of it was mounted behind the rear seat and wasn't done...
  16. Slooptin

    Ls Swap Checklist

    Damn, lots of good info guys, thanks.
  17. Slooptin

    Ls Swap Checklist

    I guess another question I have is, I have two options right now that I've sourced from pick n pulls. One has the complete combo minus wiring harness and pcm/tcm. the other has complete pcm/tcm. both are 2wd transmissions (so I'm assuming I'll need a 4x4 tailhousing). If I went with the combo...
  18. Slooptin

    Ls Swap Checklist

    I'll probably end up going with some dakota digital gauges From what I've read, the 4L80e tailshaft is too long and you need a spacer to make up that difference or cut the tailshaft down.
  19. Slooptin

    Ls Swap Checklist

    LS Swap gurus, I'm getting pretty close to pulling the trigger on a 6.0/4l80e combo, but I want to make sure I've got my ducks in a row before I get in over my head Assumptions: 1. using stock pcm/tcm & wiring harness 2. engine and trans are running when pulled 3. comes with all accessories 4...
  20. Slooptin

    Adding a Suburban Gas tank

    Hell yeah, thanks Yes, but I'd like to keep an auto trans and for my needs, diesel would be cost prohibitive. I'm also not stuck on LS, I'd consider an 8.1 or possibly even a gen 6 454/4L80e if i came across one in decent condition for cheap. MPG isn't my main concern because I know I'm not...
  21. Slooptin

    Adding a Suburban Gas tank

    ooohh part #'s would be great
  22. Slooptin

    Adding a Suburban Gas tank

    I'm assuming it'll have its own separate vent since its so far back
  23. Slooptin

    Adding a Suburban Gas tank

    Ok, so here's a question I've been floating around in my head. I've got the dual 20 gallon saddle tanks on my truck and while I'm currently getting a whopping 10mpg (LS swap in the future to hopefully raise that a bit), I'd like to add some fuel capacity for the time being. I'm going to be...
  24. Slooptin

    Age of our members

    29
  25. Slooptin

    Highliner in a crew cab?

    Anyone put a highliner in a crew cab? I'm looking to get a little better audio quality and the dash speakers aren't doing it for me. I've got 4 speakers and 2 small powered subs behind the back seat but I want something better for the front of the cab. I'm also wondering if maybe adding a...

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