350 tbi

  1. A

    Battery Arcing

    I replaced my stock alternator on my 1988 GMC K1500 with 350 TBI with auto transmission after the plug melted to old alternator and wire melted in half. I replaced the stock with a 1 wire Power Master 140 amp alternator, Part # 47861, setup. I bought the proper charge wire according to Power...
    • acespectra30
    • Thread
    • #electrical 350 tbi electrical issues electrical problems
    • Replies: 1
    • Forum: Electronics
  2. G

    94 2500 350 TBI update

    So I posted on here about a week or so ago because I was having stalling issues with my 350 TBI Suburban, may be worth mentioning that it has been cam swapped by a previous owner. Has a new distributor, new injectors, new fuel pump, new battery, and new spark plugs and was still having issues...
  3. G

    1994 Suburban stalling when coming to a stop

    Bought a 1994 Suburban 2500 with a 350 TBI and it has been a mess. Original owner did a cam swap around 50k miles ago. Sold it to some lady and her and her dad messed with the distributor a bit and then gave up on it. I took it to the mechanic and had the fuel pump, fuel filter, spark plugs...
  4. 9

    Idemtify Threaded hole intake manifold

    94 tbi 350, intake manifold, driver side, under vacuum line connection, there is a threaded hole going down, what is that for?
  5. C

    ‘93 Suburban 350TBI - Header Fitment & Custom Exhaust

    Howdy, I’m Echo, my Truck is Carmine. I’m doing a complete exhaust rework with custom piping and replacing the stock manifolds with headers. All of the headers actually listed as fitting the Suburbans are shorties, but I wanna do long tube headers, these ones specifically...
    • Carmine Echo
    • Thread
    • 1993 350 tbi c1500 exhaust long tube headers suburban
    • Replies: 1
    • Forum: Exhaust
  6. westcoastZ71

    Heater blows cold

    Hey yall, my 1995 K1500's heat doesn't work at the moment and I'm not sure why. The heater core is fine, the blend door actuator seems to be working properly, and the truck doesn't have any other coolant system issues. Really hoping to get this dealt with before the weather gets too cold, has...
  7. J

    Crank No start No fuel

    1991 Chevy k1500 RCSB 350 TBI 4l60 Parked one night and didn't start next morning, here's a list of everything I've replaced. Battery Starter + Shims Fuses Air filter Fuel Filter TBI Gaskets Distributor Cap Distributor Rotor Spark plug wires Gapped Spark plugs Oil + Filter (Mobil One 10W-30...
  8. M

    Vortec my Granddads 93 C2500

    I have come to own my Grandfather's 93 C2500. It was have reliability issues when driving it to work and back, so I've decided to over hual the motor. (I dont really know what im doing) I've heard and read on here that the vortec heads are a huge improvement so I'd like to go that route. I also...
  9. H

    Throttle is hesitant, and can backfire when I give decent throttle (finally corrected word)

    1994 Chevy Silverado Extended Cab with a original 180,000 mile Chevy 350 TBI and 4L60E. When it becomes time to speed up quickly, the engine is hesitant, and just backfired once this morning. When giving just enough throttle to drive around normally, no problems... What could this be?
  10. A

    89 GMC C1500 low power

    I have an 89 GMC C1500 that was given to me recently. It has the 350 in it, and sometimes the CEL comes on and I can't push it past 45 MPH, and it wants to die under acceleration when it's in that state. New injectors, fuel filter, fuel pump, PCV valve, plugs, plug wires, EGR valve, and...
  11. M

    (1994 GMC C1500 350 SBC) Truck runs super high idle! Help!

    Howdy this is my first post here. My complaint is my truck runs super high idle (~1500) on starts in park. When I go to drive it dips down to 1k. As truck gets to operating temperature, high idle goes away. It seems to be related to engine temp as for in the winter it was not so bad. ECM has...
  12. K

    350 TBI ran fine, now surging start

    So I bought a 94 1500 a few months ago and it’s been running fine. It had a bit of a high idle and some terrible fuel economy, one thing I saw that was apparently an easy thing to do that might help is to rebuild the throttle body. I bought a Napa TBI rebuild kit and got to work last night. I...
  13. Warrick454

    good intake and carb for 350 vortec

    Got a bone stock 95 350 I’m gonna put vortec heads on and carb swap just want some advice on a good intake and 4 barrel carb
  14. T

    1988 k2500 goes into "limp mode" when accelerating going uphill

    I have a 1988 k2500 tbi that has been giving me some grief lately. The truck starts and idles very well and drives like normal for a few miles then starts acting up. For example the other day I drove the truck to work which is about seven miles from my house. The started fine in the morning and...
  15. S

    89 5.7 TBI sputters under load once warm

    Hello, I'm working on a 89 chevy with a 350 TBI and I'm trying to figure out this issue. The truck starts up fine and idles normal, I can rev it no problem upon first start up but as soon as she starts to get warm and also once up to temp when I rev or accelerate she starts to sputter and has no...
  16. B

    90 k1500 5 speed after 1/4 throttle falls on face and goes no where

    90 k1500 5speed I am sure somewhere some has posted or asked about this if so please tag a link for it. Idling okay. But driving down road will go okay for a sec till you get to 1/4 throttle and then if like there is 10klbs behind it and just has no power at all and kinda revs up a lil bit and...
  17. T

    idle dipping while stopped

    I have a 1988 k2500 that starts immediately and idles very well. However once the truck gets to operating temperature the idle will dip for a split second when I'm stopped at red light. I have also noticed the dips get worse the longer I idle while in drive. The truck has never stalled when this...
  18. A

    1988 350 tbi sputters while accelerating

    I recently bought a 1988 gmc with the 350 tbi and 700r4 in it. It was my dads truck before, and he never had any issues with the engine much. He did have transmission problems, and I recently finished swapping the tranny and I noticed a very serious sputtering issue on acceleration. It starts...
  19. Chrimson85

    Throttle body issue, Stuck High Idle after gas pedal pressed.

    My Truck is 1989 K2500, engine is a 5.7 350 TBI with 4spd Manual. The problem started after the truck sat for a while. The issue is that when the gas pedal is pressed the truck's idle climbs and doesn't come back down. I have to turn the ignition off to stop it from self destructing. I've...
  20. T

    Not starting after doing a De-Carb on engine

    I really need help! Yesterday I did an engine de-carb on my 1988 k2500 at work. Nothin unusual happened while i did the de-carb and I even drove it home after without any issues. However after letting it sit all night i went to start it this afternoon and it doesn't crank I only here the starter...
  21. 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)
  22. 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...
  23. 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...
  24. 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...
  25. 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...

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