tbi

  1. S

    Need advice on tbi turbo build

    So I’ve been building a turbo set up for my 1991 gmc k1500 4x4 with a 350 tbi with a nv4500. I just want a bump in power; something a little fun. I’ve been prepping it for a year or more. I’m plan on using a hx35 for minimal boost lag at a maximum of 6 pounds of boost. I got a header kit for the...
  2. S

    HEI wiring, electronic choke wiring and carb linkage for an edelbrock

    Hey everyone, finishing up the carb swap on my 88 C1500 and I’ve been reading a lot on this forum. From what I’ve read there seems to be a lot of talk over an electronic fuel pump, I don’t believe the 88 model had an electric fuel pump isn’t it manual? Correct me if I’m wrong What would be...
  3. 1989Stepside

    Engine has high idle after every restart

    Hey, I'm having an issue with the idle on my truck. I think I know what the cause is but I'd like a second opinion. I have a 1989 5.7L 350 c1500 2wd Every time I restart the engine after it's already warmed up, the idle will be a bit too high. However, once I put the transmission into Drive or...
  4. S

    Intake, distributor and carb recommendations for 5.7 TBI heads?

    Haven’t posted here for a while hope everyone is doing well. I’ve got a tbi 350 in my 88 C1500 and I'm planning on switching over to a carb setup. I’m well aware that TBI heads are inferior to vortec heads but let me explain why I’m keeping them. My truck has been running way rich for a...
  5. P

    1987 GMC TBI Crossroads decision time (upgrade stock tbi or aftermarket efi)

    Hello Group So i am a long time mechanic but newer to the tbi world but love the 87 GMC longbed i found. So my current situation is i had a 383 stroker engine built for my truck (Stock heads with 3 angle valve job) mild performance cam, new 383 crank, hyperuetrctic pistons 9.5 to 1 comp, etc...
  6. C

    Engine Running Slightly Rough And Code 42

    Recently I did a cam swap in my 1994 k2500's TBI 350. After which the engine ran quite smooth and I was pretty happy with it. Over time however I started to notice it was progressively running a little rougher, like I could hear each individual cylinder firing more distinctly. The last...
  7. C

    1992 TBI 454 4L80E. Idle hunts in Park/Neutral but is smooth in drive.

    Hi Everyone, I have been chasing down a idle hunting problem recently. My issue is that in park/neutral the engine idle will hunt for the a stable engine speed. This happens after the engine warms up. When I shift into drive the engine speed stabilizes. The AFR in drive is rich around 11. The...
  8. 19971997

    1997 C2500 Engine swap w/ TBI Long Block

    Im writing this in a hurry since im on my lunch break but this is what i got going on: Picked up a nicer than normal northern states truck (Indiana) with a trans issue. It would only drive in revrse. I got the tranny rebuilt and the truck drove fine back from the shop. 2 weeks later it had all...
  9. TheAutomaTom

    '91 305 TBI stalled out, got towed, never started again

    1991 Chevy C1500 Scottsdale, 305 5.0L TBI, standard tranny, 309k miles, super fun to drive. Backyard find. Major issue was distributor, but replaced a bunch of parts because everything looked crummy and I wanted to be confident it could go. A few months of driving her around with no issues, it...
  10. 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...
  11. OhmanSWE

    Help getting a oil pressure gauge installed

    Hello! I have a Cadillac deville 1966 where the previus owner engine swap to a 5.7L vortec 1997. I would like to install a oil pressure gauge, where can i install it and how? I have read it could be behind the oil filter where i should be able to screw in a nipple and get the tube from the gauge...
  12. hilly101111111

    Rough Idle, hesitation and bucks

    I have a 1990 GMC k2500 5.7/turbo 400 trans. It always had a rough idle and when I drive 50mph - 65mph it kinda bucks and skips and it'll be flat when it happens and I have my foot on the pedal like 1/4 of the way. The truck had a ton of new parts on it including a fuel tank sending unit pump...
  13. 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...
  14. 1

    454 SS dies randomly, no codes

    I’ve got a 1990 454 SS Pickup with 114000 miles. This is the most unreliable vehicle I have ever owned. The main reason I am making this post is because the truck always dies for no apparent reason, and then proceeds to no-start for a duration of at least 20 minutes (give or take). The ECM never...
  15. Nick88

    Gas Mileage

    With these trucks, gas mileage is not a strong suit, although, fuel economy can be increased for relatively cheap and especially with the price of gas, will save you a lot of money. I did some mods to my truck which helped my 350 TBI in a 1988 square body Blazer get in the 20s cruising on the...
  16. Idaho83815

    '93 K3500, 454 TBI, poor drivability

    Hello, newby and looking for advice. Thanks in advance. 1993 GMC K3500, 7.4, TBI, 156k miles, 4L80E Auto Trans (Jasper Reman tranny installed 2 years ago) I have owned it 6 years and it goes to the dump and plows snow in and out of our property in the winter. Always had a high idle (1000-1200)...
  17. DKT5

    Noise Identifying

    Hi there I have 2 noises in my 1988 k1500 5.7l tbi. The first one I noticed going about 70 mph you would hear a screeching/whirring noise for just a split second then immediately it goes away. Engine warning light comes on.. after turning truck off and back on again the light goes away although...
  18. S

    High compression heads on a TBI 454

    Hello, I have put together a build list for my 1993 c2500 with a TBI 454. I figure the abysmal compression ratio could be boosted to make more power and improve economy. The list includes: less wimpy cam, hydraulic roller lifters, Edelbrock high compression heads, Edelbrock TBI intake, injector...
  19. U

    Good cam specs for build?

    So I had plans to do a 377 stroker but my 450r bike blew up bottom and top end and the suspension has been out for a while so I’m a bit tight on play money. Rather than doing an all out 377 build iv decided just to do a mild build on a 350. What are good can specs/can you recommend for the...
  20. Mitchell93

    Tbi 350 has no power on the road

    1991 K3500 with a Tbi 350 and 4l80e Idles fine, will revs up no problem, in park... when I take it out on the road, it won't go over 30 mph unless I go downhill, it just falls on it face, can hold it wot and it just don't Rev past round 2000, and just doggy, no power. It has transmission codes...
  21. U

    TBI or EFI options

    So the story is, I’m planning on building a 383 stroker. I have a regular cab short bed k1500 1990 with TBI 350 and 5 speed manual. Planning on swapping to a nv4500 so my tranny will hold up. Going carbureted is out of the question so what are my options for a reliable TBI or EFI setup. I’m...
  22. 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...
  23. J

    5.7 tbi swap ecu chip

    I have a 1991 Chevy c1500, originally a 4.3tbi, however I recently swapped to to a 5.7tbi junkyard engine. So far I have got it running and everything seems to be working okay other than it smelling like it is running really rich. From other post I have read about this swap everyone recommends...
  24. I

    TBI Injectors 2003 5.7 indmar Gm based

    Hi, I have no flow going through my injectors and I think I need to replace them, I just don’t know what part number that would be.
  25. Z

    Full throttle problem

    SORRY FOR THE LONG POST NEED YALLS HELP!!!!! Been a forum stalker for a long time.... love this site, and was planning a build thread..Ok, I've been doing this a long time and I think a tune is the answer but im looking for some help....I've followed this forum for a long time and there are A...

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