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  1. Mitchell93

    Tbi 350 has no power on the road

    Part of the reason I was so frustrated with it was because I measured them all with the rockers on, and they kept bleeding down, so not one I was confident with, so I took them off, and now I'm confident. The worst part was setting up the cheep Harbor freight tool, keeping the pushrods straight...
  2. Mitchell93

    Tbi 350 has no power on the road

    OK, so my distributor is on correctly, looks just like that picture that L31MaxExpress posted, I got a CHEEP dial indicator from harbor freight, it's junk, it takes so long to set up, I did the entire left bank, and really don't want to do the right, it's just so frustrating setting it up, and I...
  3. Mitchell93

    Tbi 350 has no power on the road

    The plug wires are no my issue, the previous owner put brad new ones on, and I threw a set on I yanked from a 95 I have in the weeds, no difference, I also power braked it, to make it run like ****, and did a cylinder deactivation test, to find out that I am not chasing a missfire, it's fireing...
  4. Mitchell93

    Tbi 350 has no power on the road

    I will be checking my cams lift this weekend, I'm not a complete noob to this, I went to college for automotive technology, and worked at a dealership for 3 years, that was 9 years ago. now I'm a linemen working on the road, bought the modis is 2018 when I flagged down a random snapon dealer to...
  5. Mitchell93

    Tbi 350 has no power on the road

    Firing order is 100% correct, double, triple check every time I hook up wires, exhaust doesn't smell that rich, maybe a tad gassy but I've smelled worse... I have no engine noise to speed of, honest sounds very healthy, I can pick up a dial indicator this week and check my valve lift, found on...
  6. Mitchell93

    Tbi 350 has no power on the road

    The distributor was off a tooth when I got it, but it was adjusted enough it really didn't matter, the wires going to the coil were tight, I put it in correctly and set base timming to zero
  7. Mitchell93

    Tbi 350 has no power on the road

    Already done that, that won't tell me if the cams warn, that tells me the valve are sealing, but if it doesn't open far enough to alow enough air through is where my heads at...
  8. Mitchell93

    Tbi 350 has no power on the road

    Humor me, what would a warn cam/lifters act like? Thinking maybe the extra fuel is from not enough air, say my intake valves are not opening as wide as they should... idk, is it worth pulling the intake to have a peek at the lifters? It revs up just fine in park or neutral, will red line and...
  9. Mitchell93

    Tbi 350 has no power on the road

    I replaced the entire throttle body from a known good truck, with zero change in how it acts, its from the same year same size engine, only difference is it was from a gmc half ton
  10. Mitchell93

    Tbi 350 has no power on the road

    Looks to me like I'm going mad rich when the problem happens, assuming of misfires I stuck small chunks of wire under each spark plug boot on the distributor, and wile I had someone power break it, grounded each one out one at a time. Each time i can tell the engine was loosing a cylinder, so it...
  11. Mitchell93

    Tbi 350 has no power on the road

    Here are the other 5
  12. Mitchell93

    Tbi 350 has no power on the road

    Here are all the same pids wile I drive it on the highway, got it to 44 mph but I had a little downhill mixed in
  13. Mitchell93

    Tbi 350 has no power on the road

    Can only attach 5... so here's 5 more...
  14. Mitchell93

    Tbi 350 has no power on the road

    Here's some data from a warmed up engine that was off for a few minutes then restarted, that knock deal I can not get to go away, I currently have the wire for it removed from the pcm pigtail, also the replacement pcm I got from the salvage yard wasn't giving my MAP 5 volts, so I can't trust...
  15. Mitchell93

    Tbi 350 has no power on the road

    So for now I still have a different throttle body I had from a 91 gmc k1500, so it's the same year and same size engine, buy switching the entire throttle body I wanted too rule out fuel pressure regulator, because I had to order an adapter my fuel pressure gage kit didn't have. Also ruled out...
  16. Mitchell93

    Tbi 350 has no power on the road

    My cousin never dropped his suburban off so that have to wait till next week, but I'm on to something... With the knock pid, it reads 46 to 254 all the time, just stays at 46 and jumps to 254 so fast I would not see it if it weren't for the graff. It was stay at 46 with the engine off, The knock...
  17. Mitchell93

    Tbi 350 has no power on the road

    I can throw a different set on to make sure, that's a good idea though, I've seen a tiny pin hole ark to the manifold when I was in college, so who knows, the wires look very new, but I'll check it out...
  18. Mitchell93

    Tbi 350 has no power on the road

    There is no converter on it, guess previous owner sold it to pay for all the new parts he tried...
  19. Mitchell93

    Tbi 350 has no power on the road

    I do own a scanner (modis edge) and can monitor reading from all the pcm imputs, my cousin is dropping off his 91 suburban for me to compare the data inputs from a known good running tbi to this one, I hope if I can find a big difference it might help lead me down a path to looking for say high...
  20. Mitchell93

    Tbi 350 has no power on the road

    Got a different pcm from a salvage yard today, matching everything, and runs the exact same...
  21. Mitchell93

    Tbi 350 has no power on the road

    I got a piston stop, checked the balancer and it is perfect, checked compression, getting 140 to 150psi for all of them, steady 13 to 14 psi for fuel pressure. my pcm is the 16147060, the memcal says AWBK. The tcc won't be my issue because i can feel there's something off just leaving my uphill...
  22. Mitchell93

    Tbi 350 has no power on the road

    I unplugged that one wire pigtail, ik what base timming it, also can not say for sure if the balancer is accurate, another thing I can check...
  23. Mitchell93

    Tbi 350 has no power on the road

    Thank you all for your quick response, I'll go down the list... So both of the injectors are differently working, I can see a clean healthy looking cone shaped spray from both, I have not held it wot wile watching it, it does Rev up great in park, I'd have no way to watch it wile I drive it... I...
  24. Mitchell93

    Tbi 350 has no power on the road

    1991 K3500 with a Tbi 350 and 4l80e Idles fine, will revs up no problem, in park... when I take it out on the road, it won't go over 30 mph unless I go downhill, it just falls on it face, can hold it wot and it just don't Rev past round 2000, and just doggy, no power. It has transmission codes...

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