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  1. O

    Why everyone carb swapping?

    Right. Not actual edelbrock pro-Flo just the manifold. Good ol Chinese knock off manifold. I am pretty sure that if you run the same size 24 lb injectors that came stock on the vortec other then running dedicated injector harnesses, the pcm will not to be tuned for said injectors and voila you...
  2. O

    Why everyone carb swapping?

    To the op, I am building a 355 l31 going with brodix 200 ix heads, mild comp cam, full roller valve train, 10.5:1 compression with .25 quench, and upgrading the intake manifold. There is basically a knock off of the edelbrock pro Flo manifold for a couple hundred bucks that comes with basically...
  3. O

    Advice for tracking down a stumble and misfires

    I did some live data recording on my way home today. TPS, maf, and map are all reading. Ltft bank1 is +3 and and bank 2 is showing -3 consistently on lean cruise. Now getting a p0300 code obviously. Rear o2s are lazy reading 447 mv but cats are cut out and don’t really care about those. Fronts...
  4. O

    Advice for tracking down a stumble and misfires

  5. O

    Advice for tracking down a stumble and misfires

    I think what I’ll do be sure it is phased correctly like you’re saying is drill a whole in the old cap at the number 5 post and make sure the spark is straight and not jumping at an angle. I guess that would solve any maybe’s
  6. O

    Advice for tracking down a stumble and misfires

    I thought they were platinum or over the years they updated the manuals to say platinum. I have had good luck using ngk tr5 platinums in pretty much everything gm
  7. O

    Advice for tracking down a stumble and misfires

    Ya that was going to be step 2 if just advancing the gear by a tooth and bringing it backwards wouldn’t have worked. Either advancing it by a tooth was going it advance it too much where I wouldn’t have been able to retard the timing enough which would’ve been the exact opposite of being...
  8. O

    Advice for tracking down a stumble and misfires

    So as I mentioned yesterday, I did a data log this morning on my way to work which about 7 mi from home to my lot driving through my town. I was pretty surprised how well it ran compared to when I bought it a couple weeks ago and before I replaced the fuel pump this past weekend. I was able to...
  9. O

    Advice for tracking down a stumble and misfires

    The cap appears to be new. The distributor is aluminum. Unknown age or brand.
  10. O

    Advice for tracking down a stumble and misfires

    That’s what I thought too but no matter what I tried I could only bring the total timing to -8* until I did reset the distributor. Again, I bought the truck in this condition so I cannot tell you what brand or how old the distributor is. But in my research I did see where ppl had issues with the...
  11. O

    Advice for tracking down a stumble and misfires

    I am also going to try another fuel pressure gauge. I think the one I had used initially was not getting a good reading and I tried looking at pressure again tonight and got three different readings and would not read prime pressure. A friend is going to bring his kit to work in the morning
  12. O

    Advice for tracking down a stumble and misfires

    Ordered. It won’t be here until the 11th. I tried looking that part number on Orielly but couldn’t find it
  13. O

    Advice for tracking down a stumble and misfires

    Ya yes I thought about doing a simple vacuum test that sounds have some indication of the overall health of the engine. Also considering a cylinder compression test to see if any of the valves are messed up. If anything it’s a good idea of how healthy everything is
  14. O

    Advice for tracking down a stumble and misfires

    Yes 60 Less than 3 months. Previous owner replaced them as part of his trouble shooting this issue before selling it. I verified the condition of them when I replaced the fuel pump and filter over the weekend yes I am going to do a data log tonight or in the morning to verify sensor...
  15. O

    96 chevy k1500 350 egr delete

    Thanks for that link I found the pin out for the 04 gto which has the dbc pcm with the iac drivers. That can be compared to the 0411 pin out from lextech. How would one obtain a bin file for the gmt800 export trucks using the l31 with a p59 ecm segmented with a 4l60e trans info? Kinda interested...
  16. O

    96 chevy k1500 350 egr delete

    So nothing for Ios?
  17. O

    Advice for tracking down a stumble and misfires

    I bought the truck recently in this condition and knocking one thing after another out. I had initially the relearn for the crank position but it didn’t help. But after I did the relearn and the code came right back I looked at the Cmp retard pid and it showed -24* so I looked at some other...
  18. O

    Advice for tracking down a stumble and misfires

    Looking for advice here. At first I was getting a 1345 Ckp to Cmp correlation code. I was able to re-set the distributor forward a tooth and got the timing set at +1*. Light is off now but I still had a terrible cold start issue and a very bad stumble and miss at anything more then 10% throttle...
  19. O

    96 chevy k1500 350 egr delete

    Do you have a diagram for swapping the harnesses and a way to tune a p59 or know of anybody that can?
  20. O

    96 chevy k1500 350 egr delete

    Do you have a link for this?
  21. O

    P1345 code assist. Questions. 1996 GMC K1500

    Just to touch base I was able to advance it by a tooth by pulling the dizzy and rotating the engine forward just slightly enough to put the gear advanced about 15* on start up and adjusted to +1. It’s very touchy to get cinched down. However now that issue is out of the way and the light is no...
  22. O

    P1345 code assist. Questions. 1996 GMC K1500

    Thanks guys this was my line of thought but wanted it confirmed by somebody else if it was going to work. I’ll try to give it a go today after work and see what happens. I do have a scan tool that reads the cam crank correlation. I’ll let you all know
  23. O

    P1345 code assist. Questions. 1996 GMC K1500

    Hello, so instead of trying to post another thread I figured I would post my question here. I recently brought a 98 k1500 with a lot of miles but a couple years ago I did full time up on this truck a couple years ago for the previous owner but it just hasn’t ran right before or after. It is very...

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