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  1. weaponoffreedom

    7.4 Vortec lower intake coolant leak?

    Looking for a bit of help. Been chasing a negative fuel trim issue, sometimes near -18 on both banks. Fuel pressure is good. 58 FPR is functioning and new Injector pulse test 60-30psi, all the same, and new style bosch not rochester, I changed them myself. Lower intake manifold gasket is...
  2. weaponoffreedom

    Best ignition upgrades for 7.4

    Looking at an ignition upgrade 1999 7.4 Best parts, most reliable, money is not an issue. factory setup, no coil over plug conversion any suggestions?
  3. weaponoffreedom

    Need Help.....7.4 lean bank 2

    need help........ yesterday.........threw codes for MAF and others,........checked LTFT on bank 2 ans 1 and is was @-2%, nearly perfect.........running fine......reset code today......no code.....noticable knock.....checked LTFT +17 at times, bank 1 ok. any thoughts?????
  4. weaponoffreedom

    Anyone ever use "The Gear Shop"

    Anyone ever use "The Gear Shop"?? https://thegearshop1945.com/
  5. weaponoffreedom

    GMT400 7.4 headers

    Anyone run long tubes of thier 7.4 GMT400? If so, give me a link to some options or share your knowledge
  6. weaponoffreedom

    np246 grinding noise........

    Np246........... intermitent grinding noise.......... IN 2wd noise will go away instantly when shifted into 4wd or auto from 2wd no noise in 4wd or 4wd auto will not shift into 4lo ( the encoder motor is trying to shift but will not and goes back to 4wdhi......loud bangs) am I correct in...
  7. weaponoffreedom

    Stock 4l80e power

    Some say the 4l80e cant handle much power. I have another 2500 Suburban,6.0 Vortec, stroked to 6.6, then supercharged. Anyone running a stock 4l80e \ np246 in high HP applications? I know what books say, I am wanting real world knowledge.
  8. weaponoffreedom

    for the third time......

    recently purchased a 1999 Safari Trek motorhome. For those who dont know, they a ridululously well made motorhomes. The company went outod business diring 2008 recession. anyway, had slow crank issue when warm, so new fpr and injectiors. working on this issue inthe rv is great, as i can be...
  9. weaponoffreedom

    New member here.......

    New member, from NC, USA I have one gmt400, 99 k2500 Suburban, 7.4 4x4 and a 99 P30 chassis, motorhome 7.4

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