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  1. Saab84mw

    Stock ECU Tune on 1999 L29 454

    Not that I could really tell but my engine wasn’t running the best at that time either and I had almost 200,000 miles on it. The only time the check engine light would come on is if it was miss firing so bad with backfiring and burning too much fuel then once it cleaned out it will go out again.
  2. Saab84mw

    Stock ECU Tune on 1999 L29 454

    When the shop remove my cats I had them put the O2 sensors in the same location that came from in the pipe have not had issues with check engine light also replaced both forward O2 sensors already.
  3. Saab84mw

    Losing ignition power 1999 L29

    No check engine light started about a month ago when I was pulling my camper home from a trip, I thought it was only doing it while driving but was doing some testing yesterday and checking all the electrical connections and tried it sitting in the drive way and it is doing the same thing as on...
  4. Saab84mw

    Losing ignition power 1999 L29

    Replaced the ignition module and checked the ohms on the coil and all the wire connections found no issues that I can see. So i tested it again setting in the driveway under no load and it is still losing ignition power and back firing. Here is the YouTube of it. Any thoughts would be a big...
  5. Saab84mw

    Losing ignition power 1999 L29

    Yes loss of power and backfiring no you can’t see it in the speedometer but you can definitely feel it in the truck.
  6. Saab84mw

    Losing ignition power 1999 L29

    Here is a video from today with the issue described in the post
  7. Saab84mw

    Losing ignition power 1999 L29

    All new parts except for injectors and Taylor plug wires, MSD Cap, Rotor and coil only has about 7000 miles on it was replaced right before the engine went.
  8. 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...
  9. Saab84mw

    Stock ECU Tune on 1999 L29 454

    Found a local HP tuner $575 out the door including Dyno time. Working on getting the truck ready for them. Having to fix a few things first went by and talk to them and they made some suggestions one big thing was to have the injectors flow tested.
  10. Saab84mw

    Stock ECU Tune on 1999 L29 454

    If that is the case with the cam them COMP Cam's were not truthful with their assessment of the comparison of my stock cam to their recommendation for a replacement cam for towing. Ether way I have what I have and still need to tune it, just trying to make it run and tow better.
  11. 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...
  12. Saab84mw

    Plenum intake issue

    I found the issue it was one injector all the way in the back and it was only leaking at high pressure. I had already put new O-rings on the top and bottom of the injectors so I pulled it off and cleaned it again and moved it to the front of the fuel rail so I can keep a eye on it. So far so...
  13. Saab84mw

    Plenum intake issue

    Thanks just didn’t wanna have to pull that Plenum off again but I guess that’s gonna be the next thing I do let you know what I find
  14. Saab84mw

    Plenum intake issue

    that’s the issue I can’t see the fuel the only time I seen any remnants of it was at night time when I shined a flashlight and I could see the residue between the upper and lower intake
  15. Saab84mw

    Plenum intake issue

    I just replaced all that with the new engine new injector O-rings check the injector rail put new clips on it looked underneath there and everything’s tight there’s no fuel coming from the inside that I can see. The thing is it’s Evaporating so fast I can’t really see where it’s coming from...
  16. Saab84mw

    Installing and correctly setting a vortec distributor

    Thanks it’s a very useful article it help me get my distributor set the only thing I see is you need to have the correct scanner to read the CMP signal if you don’t it won’t work fortunately a friend of mine had a scanner that would read it and I got it done. Thanks again
  17. 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...
  18. Saab84mw

    Rocker arm too loose

    Here is the video
  19. Saab84mw

    No start a new engine 7.4 Vortec

    The issue I had was the battery dying before I could get finished with the procedure I had a fully charged battery when I started and it would be so dead by the time I got done that it wouldn’t turn the truck over so because I could not find my battery charger (thanks son for borrowing it) I...
  20. Saab84mw

    No start a new engine 7.4 Vortec

    OK I got the PassLock system reset took longer than 10 minute sessions took like 30 minute sessions to get it reset with the battery charger hooked to the battery the whole time. Now I have to work on the P1345 code.
  21. Saab84mw

    No start a new engine 7.4 Vortec

    I started with a fully charged battery that was near the end when I couldn’t get it to start. I’m going to try this afternoon to get it past the PassLock feature I had to buy a battery charger because it keeps running the battery down while trying to reset the PassLock
  22. Saab84mw

    No start a new engine 7.4 Vortec

    Could this been activated because I towed the truck and trailer it back to my house from an engine failure?
  23. Saab84mw

    No start a new engine 7.4 Vortec

    Tried that already and it has never had chipped key it uses a regular style key and the doesn’t flash it just stays on.
  24. 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...
  25. Saab84mw

    New engine not running right

    Not at this time and it will not accelerate at all soon as you try to give it any throttle it shuts off The only sensors I did not replace was the two sensors on the Throttlebody and the crankshaft sensor. was not having an issue with any of those sensors before the engine went south when I...

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