tbi

  1. S

    Good ready to install vortec heads?+cam recommendation

    Hey everyone, the summit 151124 vortec heads I originally wanted have been out of stock for some time now, says they’ll be back in stock in august and I don’t plan on waiting that long to do my head and intake swap. Does anyone have any recommendations for ready to bolt on vortec heads already...
  2. S

    1988 C1500 350 carb size? Two PCV valves?

    Hello again everyone, I’ve installed a pretty mild cam (CL12-249-4), I’m very happy with the power gains. I plan on running some vortec heads with Z28 springs, I also have short tube headers, and I have a duel plane intake I’ll install when I get the vortex heads. My question is, what size and...
  3. S

    Engine and car shakes bad/ misfires on the road after cam swap (CL-12-249-4) 1988 Chevy C1500 aTBI 350

    Hey everyone, I’ve made a couple posts here about my cam swap I did on my truck. Well I finally got it idling 950 rpm in park with a rough idle, 550 in gear when the truck is hardly in motion and 1000 when the truck is moving very fast down the road with my foot off the gas. Timing is set at...
  4. S

    Crank no start 1988 Chevy C1500 5.7 350 tbi

    Truck was running fine after the cam swap it idled smooth and revved smooth, everything was working properly and I didn’t wipe the cam, it was lacking power on the road that I now know was a incorrectly set transmission cable and never setting proper advance timing. I decided to try and...
  5. S

    TBI issues

    Hey yall I lost the flat white plastic washer on the male end of my fuel return line adapter that screws into the tbi housing, when I re assembled everything my truck ran fine but I noticed a drip on the passenger side fuel pod, it still sprayed but was dripping. Figured id try and fix it and...
  6. S

    1988 5.7 hardly drives after CL122494 comp cams install

    Hello everyone im new here so please forgive me for any rules I break or mistakes I make. Im so glad I found this sight because I am at an absolute loss right now. I want to turn my daily driver/work truck into a old school hot rod. I have alot of plans for this 88 single cab c1500 but a...
  7. 92k2500454

    92 tbi 454 stuttering

    Hi y’all, new here bud I picked up a 1992 k2500 with a 454 in it about 5 months ago. Usually I just drive it around town but today I had to do a 30 mile highway drive. It started to stutter on highway speeds not to bad but I could feel it wasn’t right. The truck is also doing it while at a stop...
  8. J

    High Idle - Rich Exhaust

    1989 CHEVROLET C3500 7.4l TBI Automatic Transmission Fuel Pressure: 11.5 psi Manifold Pressure: 18 hg Thermostat: 205° F Timing: 4° BTC Controlled Idle: 750 rpm/13 counts Minimum Idle Air Rate: 700 rpm TPS at Idle: 0.82 volts MAP: with-in ranges o2 Sensor: voltage high at idle (0.8-0.9v +/-)...
  9. mint88

    1988 C1500 5.7

    She has been my baby. I'm only 19, so I still have quite a bit to learn. This truck was a college gift from my grandparents, and it has probably been one of the greatest things in my life. This truck has had quite a few interesting experiences. Anywhere from mid-highway control arm swap, all the...
    • mint88
    • Thread
    • 1988 1988 c1500 lwb 2wd 5.7l 350 5.7 c1500 tbi
    • Replies: 11
    • Forum: Member Trucks
  10. mint88

    1988 5.7 Swap

    Hey, About a year ago, I did an engine swap on my 1988 C1500 from a 5.0 to a 5.7, and it mostly went well. However, there are a couple things I have not been able to work out. One thing is that it stalls every now and then. It'll happen when I am breaking, in park, accelerating, or whenever it...
  11. J

    93 GMC K1500 Code 45

    Hi everyone, I have a 1993 GMC K1500 I bought with 160k miles a little while back, and it has an issue I have been totally unable to fix. My mechanical knowledge is pretty limited, but I figured this would be a good car to learn on. When I first bought it, it would randomly stall at idle every...
  12. I

    Driveshaft length on a single cab long bed 4wd 700r4?

    Hey all! I'm new here, but have always loved my OBS's. (Surprised this name wasn't taken) I just bought a beautiful 88 GMC, however it needs both driveshafts, I've already got the front, but in having a time finding a rear. Does anyone know how long the driveshaft for this truck would be? I...
    • ILoveTBI
    • Thread
    • 4wd drive shaft gmc long bed single cab tbi
    • Replies: 5
    • Forum: Transmissions
  13. J

    Random shutdown/IAC goofiness

    Howdy fellers. I'm about to drag up a very tired subject, so be prepared ;) My K2500 (1995, TBI, 7.4) Has been giving me some very frustrating issues as of late. Seemingly without warning, it'll shut itself off. Can happen at an idle, or when I'm coasting to a stop, or even under light...
  14. N

    The old cranks no start problem

    Greetings, I have a 1992 Chevrolet K1500 4x4 350 tbi. Truck has not been ran for maybe 4 years, ran when it was parked. Cranks, no start, fires if fuel is poured into the the tbi. In attempting to troubleshoot this I have replaced the ICM, injectors, fuel pump. Gets fuel pressure at the tbi...
  15. I

    TBI injector harness grommet.

    I'm having trouble sourcing this grommet as mine has become brittle. Does anyone know if any companies reproduce them? Also, does anyone know what kind of terminals are used inside the injector pigtail? I imagine I'm going to have the cut the wires if I replace it. So I'm either going to put a 4...
  16. Rhoadhouse94

    Solid rear window to sliding window

    Hey guys, I've owned my 1992 K1500 for about 4-5 years now, it's been in my family since it was brand new, Im in the process of making it more to my likings now that I have a decent paying job. I've always heard if you replace the rear window it's going to leak no matter what, I don't mind...
  17. Matthew40566

    Carb problems.

    Hello, Last December I picked up a 1988 GMC C1500. It has a recently swapped and rebuilt 5.7 with a 700r4 trans. The engine was rebuilt with a Holley 4175 that's missing most of the choke components. Now that it's starting to get cold it takes about 45 seconds to start and has to be warmed up...
  18. B

    Tps causing high idle

    '89 c1500 5.7 tbi with 700r4 Timing is set to 0 New sensors all around (truck sat for a long time) Tps sensor is showing .49 volts with key on and not running, once it's started it jumps to 1.3-1.5 volts. Idles high around 1500-1700 When I pulled off the old sensor one of the bolt heads snapped...
  19. Horntoad

    TBI Throttle body 88-95 ridge removal

    On a number of forums, including this one, removing the ridge from a 350 throttle body (Rochester 220) is discussed and recommended. The reasons given are that it removes an air flow restriction and deshrouds the injectors. While not disputing those recommendations, I'm just wondering what the...
  20. S

    350 tbi injectors suddenly louder ?

    Brand new throttle body put on about a year ago, checked all vac lines, map sensor,pvc, new 02 sensor. Sounds like extra air coming from somewhere. Suddenly louder than it normally is. Someone please help,
  21. dAT OBS

    Info on tbi 350 swap to tbi 454???

    Getting ready to replace the good 1992 350 with a good 1990 454...I have couple questions Are the serpentine accessories brackets the same size Any wiring difference I know I need 454 exhaust manifold but is the OEM y-pipe different sizes Any more differences???
  22. Hoosierlong90

    350 vortec swap

    Hey yall, Just purchased a new dressed 350 96-2000 vortec. I am putting it in a 94 K1500 that originally has 350 tbi. I want to keep the tbi and make this as simple as I can keeping all the gauges and 4l60 working. Vortec fuel pump has already been installed. I know I can either keep the carb...
  23. R

    '91 350 TBI cooling system weirdness

    Changed thermostat and hoses, trying to bleed the cooling system with a spill free funnel (already tried with just the rad cap off on ramps, same result). Anyone have an idea of what's going on?D have much experience bleeding cooling systems, not sure if this is normal. First video is idle with...
  24. B

    1989 c1500 long bed single cab 5.7 build log

    Bought the truck with 150k and already driven it to 160k. So far I’ve been fighting a rough idle issue and have replaced Fuel pump (stock unit) Tpms sensor IAC sensor Coolant temp sensor (for ECU) Distributor Ignition coil Plugs and wires Spare tire Rear shackles (0/2) Exhaust (straight pipe)...
  25. T

    Running lean or rich never perfect

    Daily driving a 94 K1500 Z71 extended cab. I love the truck and I'm looking to get the best performance possible on a tightish budget. The engine was rebuilt mainly back to stock. The TBI was also rebuilt. The only upgrade was a 450 lift cam. the issue I'm having is my TBI just can't seem to...

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