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  1. Slooptin

    Small block and big block exhaust interchange

    Might be a stupid question, but will a stock exhaust system (post manifold) from a small block truck bolt up to a big block and vice versa? I have long tubes and true duals on my big block and I want to go back to manifolds and a 2-1 and wondering if I can just slap in the stock exhaust from a...
  2. Slooptin

    454 intake manifold gaskets not sealing

    Sorry for the dogshit pics. But the lower part of both gaskets is wet with oil. Oil is also fresh because I’ve been having to constantly refill as I drive. I checked all 4 surfaces for flatness and they’re true as far as I can tell. Also no machining on heads that I’m aware of
  3. Slooptin

    454 intake manifold gaskets not sealing

    Enough of a difference to cause this much leakage?
  4. Slooptin

    454 intake manifold gaskets not sealing

    After suspecting that my oil consumption + low vacuum issue was the result of bad intake manifold gaskets, I was able to confirm that that was the case (see pics). Basically I had a leak under the manifold that was simultaneously sucking oil into the intake ports and not letting me get past...
  5. Slooptin

    88-91 antenna base

    I guess I'll try it out. Thanks
  6. Slooptin

    88-91 antenna base

    Anyone know if anyone still makes the non-labeled part below? my antenna recently snapped off in the base and I havent had luck backing the broken stud out.
  7. Slooptin

    14BFF into suburban: What parking brake cables?

    78 I believe
  8. Slooptin

    14BFF into suburban: What parking brake cables?

    Throwing a 14bff into my 90 suburban (v1500) and wondering which parking brake cables to buy. One on the axle is currently cut and the other looks like it will be too short based on eyeball measurements
  9. Slooptin

    Power window relay issues

    Wired it up like that diagram at least 10 times, just got clicking from the relay, no window movement
  10. Slooptin

    Power window relay issues

    Ya I had two hooked up. Still nothing. Ended up running a better ground, changing relays to a different brand, double/triple/quadruple checking wiring, changing fuses, etc. still nothing, so that’s it. Wasted like 3 hours on something I thought would be fairly straightforward
  11. Slooptin

    Power window relay issues

    Trying to hook up the power window relays and I’ve got some questions about wiring. I’m using the following diagram and I’ve got fused power from the under hood junction block going to 30, 85 is ground, 86 is to the switch and 87 is to the motor. If I ground 87a, I can hear the relays click, but...
  12. Slooptin

    1991 gmc suburban stock shock question

    Just picked up a 91 gmc suburban 4x4 and now that I've got it on the road, it definitely needs some shocks. It's still got the quad front shocks but they could very well be the original factory ones. Rockauto has part numbers for inner and outer shocks, but I'd like to go to just one shock...
  13. Slooptin

    Exhaust options for a 1990 suburban 4x4?

    Anyone have any suggestions for exhaust kits for a 1990 4x4 burb? most shops in my area are quoting 1500-2000 to build a custom exhaust and the dynomax kit I ordered from summit was designed by a blind man the way stuff is fitting up.
  14. Slooptin

    Need help figuring out options for regear

    I've got a tach now, but I'll take both answers into consideration
  15. Slooptin

    Need help figuring out options for regear

    I have a 90 burb (350/700r4) with a 6" ORD lift and 10 bolts front & rear. I run 35" tires most of the time with some 33" studded snow tires for winter. A previous owner (not the guy I bought it from, but the dude before him) installed 5.38 gears in the 10 bolts, which I'm sure are fine for 40's...
  16. Slooptin

    350 tbi idle speed

    Ok, so a little update, I replaced wires, cap, rotor & plugs. That didn't fix the issue. I went to reset the timing and noticed that the harmonic balancer must have slipped. When I try to set it to 0 degrees, it dies. It is still surging/dipping randomly at idle which I'm thinking isn't related...
  17. 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.
  18. 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...
  19. 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
  20. 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...
  21. 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...
  22. 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
  23. 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...
  24. 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...
  25. 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...

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