Search results

  1. beady

    1987 454 TBI down on power, runs good otherwise

    Yeah, I’ll try to put the gauge back on and read at speed. Probably can’t this weekend as I won’t have a second person to help me. I just drove it to work and back (110 mile round trip) and I may be back on it being an engine issue vs trans. It pulls away great from a stop at about half...
  2. beady

    1987 454 TBI down on power, runs good otherwise

    I can manually run through the gears like that and it shifts perfectly fine. Can’t tell you rpms though. You can manually downshift fine too, as long as it doesn’t spike the rpm’s/you don’t mash the gas after downshifting.
  3. beady

    1987 454 TBI down on power, runs good otherwise

    There’s no tach, but you can be doing 55 and floor it and it won’t go anywhere. You can do the same thing in any gear. If it downshifts and revs go up past a certain point (or you are trying to put too much power through trans it seems) it won’t accelerate. At any speed. As long as you’re...
  4. beady

    1987 454 TBI down on power, runs good otherwise

    I think it’s because if you drive it almost normally you don’t notice the issue. You have to give it some gas. So maybe the guy put it back in and puttered around and was like “seems good”. I mean it is nice and solid pulling away, and shifts really nicely up the gears. Not harsh, zero...
  5. beady

    1987 454 TBI down on power, runs good otherwise

    TH400, sorry. Odo reads 80K. The guy I bought it from (guy has a shop, all the cool toys, etc., so works on stuff) said he had bought it for his son and went to preemptively service the trans (since he didn’t know what shape the truck was in, even tho it’s super clean) and dropped the pan and...
  6. beady

    1987 454 TBI down on power, runs good otherwise

    12+ psig
  7. beady

    1987 454 TBI down on power, runs good otherwise

    Does the same thing in each gear. Fine at low/part throttle until revs get higher, then slips. Trans was supposed rebuilt only a few dozen miles before I bought it. Trans is spotless/freshly painted. Fluid is perfect, not a hint of discoloration and zero burnt smell at all. I have not...
  8. beady

    1987 454 TBI down on power, runs good otherwise

    Only 3 speed. Acts the same in every gear, fine at part throttle, slips past that point.
  9. beady

    1987 454 TBI down on power, runs good otherwise

    Anyone know how to tell if it’s the torque converter or clutch packs in the trans slipping? I’m a manual trans guy so haven’t ever delved into autos. Fluid looks great and doesn’t smell burnt. But I’ve been driving in gently, keeping it out of the rpm ranges it slips. I’ve probably put...
  10. beady

    1987 454 TBI down on power, runs good otherwise

    So, I’m thinking it’s the trans/torque converter, not engine. It pulls solid and great from a stop, and pulls fine in any gear as long as the rpm’s are low. As soon as they climb, it just slips massively. Can manually put it in each gear and it’s fine until the rpm’s get higher. I put it...
  11. beady

    1987 454 TBI down on power, runs good otherwise

    12+ psig fuel pressure. Recent full dual exhausts from manifolds back. Can check vacuum, have to find my gauge which is buried somewhere.
  12. beady

    1987 454 TBI down on power, runs good otherwise

    I had a ‘93 gmt400 k2500 350 tbi before this, and it had WAAAAY more power and was super eager to rev out, comparatively.
  13. beady

    1987 454 TBI down on power, runs good otherwise

    So I bought this 1987 R20 a couple weeks ago, and it seems to run well except it’s down on power as rpms rise. Pulls pretty strongly from a stop, but as revs rise it stops making power. And if you are driving and cause it to downshift, it immediately does nothing. Makes noise and seems to...
  14. beady

    Retro Belt 3-pt belt install with pics

    More pics.
  15. beady

    Retro Belt 3-pt belt install with pics

    I installed Retro Belt 3-point belts up front in my 1987 R20 Suburban so figured I’d post some pics of how I installed them. I used a pic from below through the original mounting nut (my truck was missing the inner receptacles), then used a razor blade to cut the carpet and some needle nose...
  16. beady

    1987 Suburban BUCKET seats inner 3-pt buckle floor mount location?

    Yeah, they came with the sleeves but not enough of the “L” brackets so I took the sleeves off for now.
  17. beady

    1987 Suburban BUCKET seats inner 3-pt buckle floor mount location?

    Thanks, I stuck a pick up from below and use a razor blade to open the hole up some.
  18. beady

    1987 Suburban BUCKET seats inner 3-pt buckle floor mount location?

    Awesome, thanks. Will go take a look.
  19. beady

    1987 Suburban BUCKET seats inner 3-pt buckle floor mount location?

    Hi all, we just bought a 1987 suburban last weekend. It has front bucket seats with the center console. Someone has redone the interior, but they did NOT put the inner seat belt buckles back. I bought new, aftermarket 3-pt belts, but can’t tell where the inner buckles mount on the floor...
  20. beady

    ‘87 454 R20 eye watering exhaust w/ windows down

    So it looks like there might be an overlay on my dash. Is the check engine light behind it? Because I don’t see any cel in the gauge lights.
  21. beady

    ‘87 454 R20 eye watering exhaust w/ windows down

    Thanks for the input everyone. I had a ‘93 gmt400 k2500 until last month and I t had true dual exhaust and the tips exited out to the sides behind the rear wheels and it had no issues with windows down. This ‘87 has issues with the tailgate window up, it’s just worse with it down. Think I...
  22. beady

    ‘87 454 R20 eye watering exhaust w/ windows down

    It’s a suburban, not truck. No spoiler, roof rack, anything like that. I was driving with all windows down on interstate, it helped a little bit if I rolled up my driver’s window at the times it got really bad. Ac doesn’t have enough charge to engage compressor currently, so windows down...
  23. beady

    ‘87 454 R20 eye watering exhaust w/ windows down

    This was at highway speeds, 60-75. Seems to run well, doesn’t seem to smell excessively rich except after dipping into the gas for a few seconds to pass snd letting up. Got about 10 mpg, so don’t think it’s running massively rich. But just got it so haven’t really had time to go over it well...
  24. beady

    ‘87 454 R20 eye watering exhaust w/ windows down

    Hi all, we just bought a really clean 1987 454 R20 with about 80k miles. Driving with the windows down is brutal after accelerating and coming off the gas. Made even worse if the tailgate window is open. Like, so bad your eyes burn and water so badly you can barely see. It has true dual...
View older results

Latest posts

Forum statistics

Threads
44,157
Posts
950,592
Members
36,271
Latest member
jstewart7501
Top