l31

  1. AlbertaOBS

    2000 K2500 - 383 Towing Build

    Hello all, I've been lurking here for quite a while and have learned a ton from the information on this forum, so I figured it was time I shoot my shot. I have a 2000 GMC K2500 crew cab short box. L31 vortec, 4L80E, 3.73 - 9.5 SF, 8600gvwr, 2" lift, 285/75R16 Duratracs nearing 300k km. It is...
  2. Meepyneepy

    92 K1500 Blazer 5.7L V8 with 96 L31 5.7L V8 | Mystery Idle Surging

    I bought the vehicle modded by the owner before the one I bought it from, and without a list of mods (my fault). I've been trying to chase down an elusive vacuum / idle surge issue for months. Everything I've done hasn't solved anything, so I think I'm back to square one. I'm really stuck, so...
  3. 2000OBSchev

    350 Vortec carb swap

    I’m working on carb swapping my L31 Vortec from my 2000 c2500. Been working at it for a while and I have the TPS kit from US Shift. I decided to go with the Edelbrock AVS2 650cfm carb and the Edelbrock 2116 intake manifold. What kind of distributor do I have to run and how do I set the carb up...
  4. P

    98 gmc misfire

    I need some help fixing the misfire in my 98 Sierra with the 5.7L V8. Its a constant misfire and causes the engine light to flash. I checked compression and it seemed alright. I originally had cylinder 8 misfire then cylinder 6 misfire but now I have a random misfire code. I've changed the...
  5. T

    Random Misfire Between 1500-2500 RPMs

    I've got a 1996 Chevy C1500 with a 5.7 vortec and it's a got a weird misfire under heavy throttle or high or low RPMs it runs smooth no misfires but when you try to hold anywhere between 1500-2500 rpms it misfires randomly it's not a dead cylinder sometime it will misfire once every 5 seconds...
  6. suburusssuck

    Not a newbie VSS problem

    98 4wd k1500 L31 4l60e. First thanks to the ones taking time to help you guys are funny as hell. You know who you are. I have the shop manuals, i have tech2win, All fuses are closed, relays are good. I replaced a faulty ignition switch so the switch is brand new and functioning correctly. I...
  7. T

    Lifter Recomendations For Cam Setup

    Hi im camming my 1996 c1500 with a 5.7 vortec i wasn't originally planning on replacing the lifters but ive got some pretty bad lifter tick and i think its a good idea to replace them while im in there with the heads off. Im looking for any recommendations ive found 2 so far some acdelco stock...
  8. T

    1996 C1500 with 5.7 Vortec Running Cold

    Hi I've got a 1996 c1500 with 5.7 Vortec and about a month ago the thermostat got stuck closed and it was overheating and then I replaced the thermostat with a stock 195° Thermostat and now my motor will warm up to the 195-200 then the thermostat will open then it stays at around 155° and no...
  9. T

    Cam Setup For L31 350 Vortec

    Hi im going to cam my 1996 c1500 pickup thats got a L31 in it i was wondering if anyone knew if the current valvetrain upgrades im looking at would work and to see what builds other people have done for there cam/valvetrain. (Im already swapping to an 0411 ECU to get it retuned and am wanting an...
  10. T

    Getting to Around 300-330Hp In an L31 in a Lowered 96 C1500

    Hi so im shootin for around 315hp and i was wondering what mods extra i should be looking at. Right now i have a bigger throttle body, cold air and a full header back exhaust system with long tubes and cats deleted. Im looking at doing a cam upgrade thats not crazy race aggresive but im okay...
  11. P

    1999 K1500 5.7 Suburban, Rear Shocks to Frame, No Nuts?

    Got a weird one, I'm about to replace my rear shocks with 2X Bilstein B6 4600 (PN 24024211). The service manual and illustrate parts catalogs both state that the shocks mount to the frame with 2X M8-1.25 X 22mm Flange Bolts (PN 11570082) and Flange Nut (PN 11609746) at 17 [N-m] (13 [lb-ft])...
  12. Alan M

    L31 Intake Spacer

    Hello group, I'm looking for a Taylor Cable 11011 Vmax Intake Spacer. If there is anyone that has one and like to sell it I'm willing to buy it. Thank you
  13. George Schreffler

    Request help: L31 5.7 Cylinder 5 Misfire

    Looking for help with ideas to diagnose and fix my 1998 Chevy K1500 5.7L L31 misfire. The situation and actions I have taken to date appeaser below. Any thoughts on where to go next would be appreciated. Symptom - Cylinder 5 misfire at all engine speeds - P0300 DTC; no other DTCs. Diagnosed...
  14. chris2323

    Increasing Fuel Pressure on Spider Injectors

    Does anyone have any experience increasing fuel pressure on the spider injectors? Its my understanding that there is a torx adjustment screw on the fuel pressure regulator. Some people have said they were able to increase pressure up to 70psi. Currently seeing over 100% injector duty cycle at...
  15. Adan Benitez

    ENGINE UPGRADE

    So, I am new to the forum but am needing some guidance here. I have a 1989 K1500 which I have begun tear down on. As all projects begin, I was simply planning on performing some small maintenance and keeping the truck running healthy. With all this free time I have obtained due to this virus...
  16. Awest623

    Might change up the heads

    I have an l31 with a chevrolet performance 14097395 (ht383) cam & 1.6 ratio rockers. I'll be dropping the 96-98 whipple onto it soon. Looking for a recommendation on heads (preferably aluminum & complete). I'll be honest, I don't know much about heads so any advice is appreciated. Edit: I would...

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