350 tbi

  1. V

    1988 350 TBI Uneven Idle?

    Picked up a 1988 K3500 last year with what I believe to be a TBI 350. Runs great and has under 100k kilometres on it, but at idle it bogs down to a near stall before returning to normal idle speed. Any ideas on what's wrong? (It's got an SM-465 in it if that helps)
  2. Slowrooster89

    90 truck with 86-87 Corvette engine

    So I've come across another dilemma in my mind. I'm wondering if I could use the factory Corvette distributor that came with the motor instead of switching out with my 305 distributor. If I can wire it in and make it work I will. Or if it's best to go with my original dizzy then I'll do that...
  3. hilly101111111

    Plug Wire Help !

    Good evening folks hope everyone is doing well. I have a silly dilemma so I decided to upgrade my plug wires to some fancy "heavy duty" Belden ones. I must say they are very nice wires we shall see how well they hold up over time. So long story short im not sure but I may have messed up the...
  4. C

    Engine Struggling to Accelerate at WoT

    Hi, this is my first post on this forum; I have a 1994 K2500 with a TBI 350. Before I go down a bunch of useless rabbit trails of part purchases I figured I'd see if anyone has a clue about my issue on here. So fairly recently I started to notice the truck was running... I don't know if I...
  5. T

    1988 k2500 tbi wont run correctly

    My truck will idle just fine but if i start to drive it has very poor acceleration and wont really go any faster then 30. If you go up a hill its even worse. Eventually when it gets warm it will start to die without throttle intermittently and backfire. I have replace the Icm, the fuel pump. It...
  6. T

    Is it possible to put a supercharger on a tbi 350

    I’m just curious and I’ve been beating around with some ideas and was wondering if you can run a supercharger on a tbi or does it need to be carbureted
  7. U

    Any 383 kits available for our trucks?

    Hey, I’m working on a restoring a truck and am trying to think through the engine side of things. I originally was going to 6.0 lq9 swap it but decided to go a different route. Is there any 383 kits available for my 1990 tbi 350 5.7. I’m not that familiar with old Chevy motors. Iv found some...
  8. S

    Shift linkage

    So i have a 93 C1500. Just recently put a new (used) 4l60e in it. But i cant get it into park easily. I either have to throw it or physically pull the linkage on the tranny into park. I know the bushings are bad. But they were bad on the original tranny. And i never had this issue. I tried...
  9. B

    Help: WINALDL Readings & No Fuel Prime & Knocking 350 TBI

    Hey there, I have a 1991 c1500 5.7l 250k miles. Bone stock. I just ran WINALDL to help diagnose my knocking engine. Truck only starts after a long crank once the Oil Pressure Switch kicks on the fuel pump, therefore bypassing the ECM- right? Truck does NOT prime fuel with key on, engine...
  10. T

    1988 350 tbi Rough Idle When Warm

    I recently acquired a 1988 Chevy 2500 with the 350 tbi in it that has about 80k miles and had been sitting for a very long time. When I got the truck it had a miss fire, back fire, and very poor throttle response. Since getting it I replaced the fuel pump, leaking fuel lines, Idle air control...
  11. N

    Does anybody know what is the minimum needed to bench test a 350 tbi

    So I have a 350 tbi that I got bare bones and I have none of the wire harness or anything to see if it runs I want to know what is the bare minimum I need to do/buy to see if it runs.
  12. N

    What’s the wire go to?

    Anyone know what this wire is supposed to go to? Truck runs fine the way it is, but I’m curious what it’s supposed to go to.
  13. R

    Need help 350 in my 91 caprice runs bad after 4 years

    I had the 350 swapped into the 91 Caprice 4 years ago it was from a 1992 C1500, it ran good the whole time, recently in the winter time it was close to about -30c and I hadn't plugged the car in overnight. When the car started it sounded like a tractor really high idle, I changed all my spark...
  14. L

    Please help! ‘90 k1500 tbi Chevy performance mild build crate motor

    We’ve been at this since October so I’ll try my best to put every part number here So I have a 1990 Chevy k1500 with the tbi setup stock. Then added these Chevrolet Performance 350 Vortec C.I.D. 330 HP Crate Engines 19433030 Summit PN NAL-19433030 Long tube headers SPN HED-69440...
  15. Z

    Hard/No start then runs fine

    I have been dealing with an issue that turned out to be a seized IAC valve causing it to bog down on decel or at a stoplight. It would bog down only for a few seconds, except at highway speed, then go right back to normal idle. It would almost sound as if it had a lopey cam in it. Since fixing...
  16. 8

    Injectors not pulsing when starting.

    I'm sure this has been covered, and I have read the posts on it, but still need some feedback. Bought a 95 OBS Single Cab Fleetside Silverado with the 5.7 TBI. Decided that a TBI cleaning was in order, so sprayed some carb/injector cleaner with it still on the manifold. Next day noticed that it...
  17. CrystaledJazz

    How would the Odometer work in an LS swap?

    Hey, I'm going to be swapping a 4.8/5.3 into my 89 350 TBI truck. I've been doing a lot of research and theres one thing that i cant seem to figure out. I plan on making everything work like factory but with a newer engine, and that means even the odometer. So I'm wondering how I wire or hook...
  18. T

    EGR solenoid bolt

    I was replacing the EGR solenoid and lost the bolt that secures the bracket to the abyss of the engine bay. Can't find it...does anyone know the size so I can just replace it? 89 k1500 with 350 TBI.
  19. T

    GM Diagnostic Flowcharts

    My truck is throwing a code 32 and a 43. Does anyone have a copy of those flowcharts that show the diagnostics process for these? Its a 89 350. I used to have a PDF of the whole book but i can't seem to locate it. Any help is appreciated.
  20. T

    Transfer case delete?

    I purchased a 89 k1500 that had the front CVs and driveshaft removed so it's effectively a 2WD truck. Now my question is, with the only remnants of a 4WD being the transfer case, is there a way to delete it? Like get a new longer driveshaft and some sort of adapter for the tail of the 700r4 to...
  21. Ryline

    Greetings from Michigan, 93 C1500

    Hey, My names Ryan, I use the tag Ryline. I have owned several 88-98 C/K model trucks. But I have 1 in particular thats my baby that I'll own forever. It was my fathers truck who passed away in 1998. I was 14/15 at the time, so once I started driving it. I slowly worked on just about every...
    • Ryline
    • Thread
    • 350 tbi 5.7 liter 93c1500 chevy c1500 custom design custom paint lowered
    • Replies: 34
    • Forum: Introduction
  22. tsr2185

    350 TBI wire harness replacement options?

    OEM 12167747 has been discontinued (probably forever), wiring harness for 350 TBI. All my pigtails and connectors are in rough shape, and i've been slowly changing em out when I replace sensors. I think it would be best to just change out the whole harness eventually with a new one. Besides...
  23. tsr2185

    1991 350 TBI Maintenance

    Hello all! New to the website, and GMT trucks. I will be purchasing a 1991 k1500 SC step side, w/ 267k on the odometer. It has a "new" motor put in it in 2013 and only has ~15k miles on it. The transmission was also changed out before, I don't know when though. It wont be a daily driver, but...

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