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  1. Saab84mw

    Losing ignition power 1999 L29

    Was driving down the expressway at 2500 RPMs running about 70 miles an hour on cruise control when the RPM gauge drops down to 1500 RPMs and jumps back up to 2500 in the process losing power to the engine like you turned the ignition switch off and back on again and it continued to do that about...
  2. Saab84mw

    Stock ECU Tune on 1999 L29 454

    I just had a rebuild done on my L29 engine and had a mild towing cam installed and was told that I would need to have a tune put on it. I just want to make it reliable easy to fix on the road so I found someone who will tune the stock ECU for me and was trying to see if any one has used this...
  3. Saab84mw

    Plenum intake issue

    Here is where I’m at I have installed a newly rebuilt engine (L29) in big green finally got the distributor set at 0° where it needed to be was having a slight fuel smell under the hood figured it was because the Distributor not being set correctly. Ted who is helping me set a distributor said...
  4. Saab84mw

    No start a new engine 7.4 Vortec

    I have been fighting with this thing for about a week now trying to get it started. It will start up and then shut off almost immediately fuel pressure is at 55 psi it will run for a couple of seconds long enough to pull almost 15 vacuum. I have checked all the fuses replaced the TPS sensor...
  5. Saab84mw

    New engine not running right

    As some of you may know by my recent post I’ve been working on replacing the engine in big green. 99 K2500 Suburban 7.4 It was rebuilt at an engine shop they punched it out 40 over and put a comp cam shaft in it I will post the card on it so I got it installed and started it up today and it’s...
  6. Saab84mw

    Rocker arm too loose

    Just got my freshly rebuilt L29 454 installed in the truck when I noticed the intake rocker on #2 was looser than the rest of them so I swapped it with the #1 intake rocker which was pretty tight and that # 1 rocker was also loose on the #2 intake. the rest of the rockers at are pretty tight...
  7. Saab84mw

    L29 Intake gasket issues

    When I first purchased this truck in 2005 with 144,000 miles on it shortly after that I replaced the intake gasket because it was leaking 13 years later it started leaking again and I replaced it October 2018. When the engine went South in February of this year took it down to the engine shop...
  8. Saab84mw

    Coolant type Green or Dex-Cool

    Getting ready to install the newly rebuilt call L29 motor in the suburban. What color should I use since I’m starting brand new radiator water pump and block, everything‘s new green or Dex-cool. Currently running Dex-cool with no issues that I know of. And why is your suggestion the best. Thanks
  9. Saab84mw

    L29 EGR pipe delete only

    Getting ready to install my rebuilt L29 engine and want to just delete the EGR pipe well I have the engine out and it’s easier to get to. The plan is to leave the EGR valve in the intake manifold and in the near future do a 411 PCM swap and tune it out altogether along with doing some other...
  10. Saab84mw

    Removing 7.4 Vortech from my 1999 K2500 suburban

    Finally got the truck back to the house now getting ready to pull the engine for a rebuild. Looking for any thoughts or tips with pulling this engine haven’t done this one before this engine is partially froze up still turns over but not very well. Like somethings I should or should not do...
  11. Saab84mw

    Heater control valve disintegrated

    Has anyone had issues with a heater control valve falling apart, disintegrating, or just melting? I was towing my camper this weekend after coming off a pretty tall bridge engine started running hot pulled over to the side of the road and found it leaking from around the control valve reached...
  12. Saab84mw

    1999 454 Vortec misfire issues

    K2500 suburban 454 vortec misfire mainly under a load and worse with the A/C on. Here is what I’ve done so far just recently with in the past week I put a MSD cap rotor and coil on the truck trying to fix the misfire issue was told that the original caps were made out of a different material...

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