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  1. M

    454 TBI doesn't like operating temperature!!!

    1989 454 TBI that starts and idles like a dream. Has a snappy throttle response and excellent power.....until it hits operating temp of 195. Now it will still sit and idle and I can put it in second gear and creep around all day with do problems. But once I give it the gas and it's above 190 it...
  2. M

    Vacuum needle vibration

    I've got a slightly above stock gen VI 454 with the comp cam 212/218 in a 1989 K3500. This is my vacuum gauge reading after reaching operating temp. It's got that slight vibration as seen which to my understanding could either be ignition problems or valve issue....or as I've been reading could...
  3. M

    Questions on TBI

    Good morning everyone!! I've got a 1989 K3500 that I've recently put a new 454 in that came out ofa 1995 K2500. I left the TBI with the '95 injectors in it and I upgraded my fuel pump to the 1996 version. I've noticed it's been running rather rich and will backfire out the exhaust so loud you'll...
  4. M

    Lifter selection

    On the flat tappet hydraulic lifters what's the difference between the two piece lifters and the one piece lifters? What's the purpose of the two piece lifters? Is the bottom piece that touches the cam a harder piece of steel than the rest? Why not just make the entire lifter a harder piece of...
  5. M

    Weak lifter

    I finally got my new 454 put back into the truck after installing a new cam and lifters. I got it fired up and it had a lifter tick. I went back in and readjusted all the lifters valve lash.....two more times and it still had the tick. And may I add that's one of the most annoying sounds to hear...
  6. M

    Help identifying these connectors

    Can someone please help me and tell me what these connectors go to. It's on an 1989 k3500 manual transmission with a 454. I had pictures of all the wires and where they went but my phone went swimming and I lost everything.ive got most everything thing else figured out but these. The white plug...
  7. M

    Oil filter by pass valves on generation VI 454

    Ok, I'm confused now. I've got a 1989 k3500 that I'm putting a crate engine in that is a generation VI 454. I'm having to install an oil filter kit because the oil filter will hit my front drive shaft as it is. And with the 90 degree adapter it puts the oil filter in the way of the exhaust...
  8. M

    Lifter valley oil splash shield in a BBC

    I'm putting a new cam in my 454 TBI engine and when I removed the intake manifold I noticed it did not have the sheet metal oil splash shield that keeps hot oil from getting on the underside of the intake manifold. I'm not talking about the one that rivets to the bottom of the intake...im...
  9. M

    1989 to 1995 ecm switch

    I've got a 1989 k3500 with manual transmission and it had the Mark IV 454 but I'm putting a 454 from a 1995 into it. I got the computer and wire harness from the 1995 with hopes of just switching my out the ecm but I see that is not possible. Is there a wire harness adapter that would allow me...
  10. M

    Need help identifying a big block

    Howdy, new guy here and I need a little help. I've got a 1989 K3500 with a 454 and manual 4 speed Muncie tranny. The original engine spun a main bearing so I went a bought another big block engine they was used. The guy said it was a 454 and I pulled it out of an 1994 Chevy K2500. I don't think...

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