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Forum: 4.3L V6 Engine Tech

Vortech 4300, LU3 & LB4 Motors

  1.   Sticky Threads  

  2. Smile Sticky Thread Sticky: 4.3L Vortec Marine Intake Conversion Helpfull Hints:

    Our Test Mule... 98 GMC 4dr Mega Moose Jimmy 4x4. Hello 4.3L Fans.... If your looking for some information for deciding weather the Marine...

    25 Pages
    1 2 3 ... 25
    • Replies: 361
    • Views: 367,887
    03-22-2019 07:09 PM Go to last post
  3. Sticky Thread Sticky: 4.3L V6 Platforms and Engine Codes

    Thanks to Josh Downey and Wikipedia for the info. The Vortec 4300 is a 90° V6 truck engine, replacing the Chevrolet 250 in light trucks and...

    • Replies: 4
    • Views: 19,749
    06-21-2013 01:42 PM Go to last post
  4.   Normal Threads  

  1. Misfire! WHat could cause this?

    I have a 2003 S-10 with a 4.3L EFI engine with a 5 speed, 189,000 miles on it. This morning on the way to work my check engine light started flashing...

    • Replies: 2
    • Views: 848
    05-14-2018 10:28 PM Go to last post
  2. 4.3 swap

    Ok I know there several threads in here about twaps but mines a little dif lol . I've got a 93 chevy 1500 4.3 tbi its locked up with a pretty good...

    • Replies: 0
    • Views: 491
    05-14-2018 09:51 PM Go to last post
  3. Edelbrock intake differences?

    Hey guys new to forum so please forgive me if this has come up before. I have a '89 Jeep YJ that I swapped a 4.3 out of a '89 s10 into. Part of...

    • Replies: 1
    • Views: 1,227
    04-23-2018 05:21 AM Go to last post
  4. 4.3 Engine Interchanges?

    I am currently running a very tired 1987 4.3 V-6 in my street rod and wish to replace it with a newer 4.3 with lower miles. My question is, what...

    • Replies: 2
    • Views: 1,171
    04-23-2018 05:17 AM Go to last post
  5. Carbureted 4.3L question

    I have a 4.3L engine with an Edelbrock 1403 500cfm carb. My issue is around 3k rpm under load and medium to heavy throttle the engine wants to kick...

    • Replies: 0
    • Views: 512
    04-10-2018 07:02 PM Go to last post
  6. Changing dist Cap & Rotor: Modern Vortec 4.3L

    Hello everyone, I just changed my Cap & Rotor. Took a few pics and figured I'd write a little how to. I know, I know, most of you can do this...

    • Replies: 6
    • Views: 21,029
    03-27-2018 09:36 AM Go to last post
  7. Seeking tips, tricks, hacks, experience and knowledge for LU3 service

    Hi, I bought a 1996 4wd Blazer for $800 with a thrown #1 rod and also came with $9K+ or receipts for recent parts and service. Likely a remote oil...

    • Replies: 0
    • Views: 455
    03-26-2018 07:13 PM Go to last post
  8. LU3 Fuel System Diagram

    As the title state I am looking for the Upper Manifold fuel system diagram for a 2007 4.3. To give you folks a little background I bought the...

    • Replies: 2
    • Views: 991
    08-25-2017 08:02 AM Go to last post
  9. Solid Roller cam in a late 4.3

    My name is Steve, I am new here. I have a Datsun truck 1976 with 4.3 v6 running low 11's. I receintly started building a new 4.3 motor, 1987 (factory...

    • Replies: 0
    • Views: 654
    08-05-2017 11:50 AM Go to last post
  10. '96 4.3 Vortec Harmonic Balancer Upgrade

    Building a '96 4.3 running a ProCharger P1sc (now for 30K) and am looking for harmonic balancer/damper options-I want a steel one because of the...

    • Replies: 2
    • Views: 1,200
    05-30-2017 02:16 PM Go to last post
  11. Cam opinions and Questions (legit stuff)

    Ok so I've been over on S10 forum for 12 years this i'm going to copy my thread bc I think the knowledge base is great over here and i'd love to get...

    • Replies: 0
    • Views: 882
    05-29-2017 03:04 PM Go to last post
  12. What aftermarket harmonic damper is available for '96 4.3 Vortec OBD2?

    I'm rebuilding my '96 4.3 vortec running Marine manifold, 44#inj, '0411 pcm, intercooled ProCharger P1sc which I have 30,000+mi on combo-80k total...

    • Replies: 1
    • Views: 793
    04-08-2017 03:25 PM Go to last post
  13. 4.3 Intake swap

    Hello, I have a 93 vortec switching from EFI to carb for my trail truck. I found an Intake off an 86 that's a 4 barrel . My question is can I...

    • Replies: 1
    • Views: 1,012
    03-27-2017 09:02 AM Go to last post
  14. older camshaft in balance shaft motor ?

    IS this possible ? will it work ? An older camshaft in a non balance motor ?

    • Replies: 0
    • Views: 760
    01-25-2017 08:44 AM Go to last post
  15. 350 hp v6

    Is it possible to build a 4.3 to 350 HP (or more) on a carburetor? I want something economical and durable that would work in place of v8, just to...

    • Replies: 0
    • Views: 1,672
    11-14-2016 05:46 PM Go to last post
  16. building a 4.3l

    ok so i can do the 60*(3400) thing, but im looking at a 92 4.3l v6 to rebuild better stonger faster for my boss. i have found a few things that are...

    2 Pages
    1 2
    • Replies: 21
    • Views: 23,776
    09-09-2016 02:01 PM Go to last post
  17. Question Does 1991 chevy s10 4.3L need oil slinger?

    I have a 1991 chevy s10 4.3L v6. When removing the timing cover, there did not appear to be an oil slinger. The chain was in pretty bad shape and the...

    • Replies: 0
    • Views: 877
    09-04-2016 03:04 PM Go to last post
  18. 4.3 Hesitation, Bog, occasional backfire

    the motor is out of a 93 s10, ive swapped the motor in to my 4runner. I am using an affordable fuel injection harness and AFI programed chip. The ECU...

    • Replies: 0
    • Views: 1,287
    07-27-2016 09:10 PM Go to last post
  19. Need Low RPM Torque out of a 4.3 Vortec

    Hello everyone, I am in the process of building a 4.3L vortec with a balance shaft. I want to get all of my power from idle to 3500RPM The...

    • Replies: 1
    • Views: 1,856
    05-26-2016 11:35 AM Go to last post
  20. Unhappy I'm new here and could use some help, please.

    Hi guys, I'm new here and just recently got this 1991 4.3L V6 GMC S15 Jimmy SLX from a co-worker that was fed up and frustrated with working on it. ...

    • Replies: 1
    • Views: 1,333
    05-25-2016 04:44 PM Go to last post

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