Search results

  1. R

    Stutters and backfires - clogged cats?

    I'm not sure how or if this is causing the other issues, the backfire/misfire, the delayed crank. Unless it would leak coolant into the cyl and it was enough that it was trying to compress it rather than burn it and the delayed crank was it trying to turn over with coolant in the cyl and was...
  2. R

    Stutters and backfires - clogged cats?

    To clarify @iamdub , I pulled the driver side first, 1/3/5/7 and all clear, no issues. So I moved to the passenger side the 2/4/6/8 bank. I pulled cyl 2 first and thats where I got coolant from, only from cyl 2, nothing from 4/6/8. Not from the side opened twice. Sorry for the confusion
  3. R

    Stutters and backfires - clogged cats?

    So to @exp500 the tach did do that and I didn't know the cause just thought a wonky ecu, when I did the AFM delete I smushed the CPS and replaced it and it didn't do it after that. @iamdub yesterday I pulled all 4 terminals off and the passenger side battery had corrosion under the lugs, but...
  4. R

    Stutters and backfires - clogged cats?

    Tac does drop and fluctuate with the idle, it is representative of the actual idle and matches my torque pro. Vam position sensor is a month old and also did a cam relearn on it aswell after replacement. I will try out the brake cleaner, just spray some on the Intake while it is running? And for...
  5. R

    Stutters and backfires - clogged cats?

    @PNW VietVet I think I am dealing with two seperate issues at the same time, The ongoing backfire and lack of power and 351/3/5/7 faults, and now this weird hesitation to turn over that just started happening. I am unsure if one is causing the other, or just happening at the same time.
  6. R

    Stutters and backfires - clogged cats?

    So waiting for a intake to get here, and still considering that this somehow could be electrical aswell. Checked all my grounds on the coils and for chassis ground read 11.4 on cyl 1 and 10.7 on 3/5/7, for PCM ground they all 4 read at 12.04 volts. Checked Ohms on the chassis ground at 80ish...
  7. R

    Stutters and backfires - clogged cats?

    Real world is this something that can be yarded or is it best bought new? Should I get other new stuff with it or just the plastic manifold and switch everything over with it?
  8. R

    Stutters and backfires - clogged cats?

    I did torque to in-lbs, and followed the torque specs and pattern shown on the jegs website. I did break the plastic gasket, both of them actually, but I very well could have broken the manifold too. It could be cracked near the driver side cathedrals and be the reason why it's only affecting...
  9. R

    Stutters and backfires - clogged cats?

    So its back at it. I get in the truck this afternoon and it doesn't start, it didn't do anything. I turned the key to on at first and let it go through the cycle, just a force of habit is all, and then I turn to start and everything goes off. No clicking, just all off. I turn the key back off...
  10. R

    Stutters and backfires - clogged cats?

    That's good, I was immediately concerned I either got bad cats or something else was wrong
  11. R

    Stutters and backfires - clogged cats?

    I have a OBD2 reader and the torque pro app right now. so FT 1 and 2 are in constant fluctuation, there is no steady number reading. bank 1 floats in -0.5 to -1.5 at idle and bank 2 is -2.5 to -3.5 at idle but at times they will zero but its for a second and then back and forth, under high idle...
  12. R

    Stutters and backfires - clogged cats?

    Update. So Got the Y pipe and got busy with life. When I removed the bank 1 upstream it had been cross threaded in and hard at that. Tried to remove the Y pipe and snapped the first two bolts on the driver side flange, figured at this rate I might as well take it to the local exhaust shop. Good...
  13. R

    Ditched the PPV suspension

    When you say HD springs do you mean the factory HD/4wd springs? It looks like it sits higher but maybe mine sits that high. Or maybe that's where I would be with brand new springs
  14. R

    Stutters and backfires - clogged cats?

    key on/engine off 55
  15. R

    Rough Country Leveling Struts?

    Ive been considering the RC ones aswell to replace worn factory struts. @2010gmcyukon which ever way you go keep us posted! looking forward to pics
  16. R

    Stutters and backfires - clogged cats?

    I hope this takes care of it all too, After this it will have new cats, o2 sensors, plugs, wires, cam, lifters, and every sensor I came across in between, new dual batts, I just did front wheel bearings a month ago, and about a year ago it got upper and lower ball joints, man I should have just...
  17. R

    Stutters and backfires - clogged cats?

    I bought the truck with 118k, its currently at 156k. I didn't change the plugs until a month ago, and the wires were done a week ago. The plugs that came out were autolites and the wires were duralast brand. Both were replaced with delcos for the time being I didn't want to throw expensive parts...
  18. R

    Stutters and backfires - clogged cats?

    So the truck had been running fine after the plug wires being replaced, and whatever in the exhaust blowing out. Then yesterday is started backfiring hard again. It happened so fast, but I do believe I hit a bump in the road and it stuttered immediately, like something may have shifted in the...
  19. R

    Bad Lifters

    I just did the same after dealing with DOD for too long and trying to limp a few thousand miles from a failing system. after buying a "kit" and learning first hand buy quality components and do it right the first time. Overall it was more time consuming than difficult, from my perspective...
  20. R

    Stutters and backfires - clogged cats?

    Update. So the No. 5 plug wire melted inside the cable, and somehow this was creating a ground fault that was shutting down all or most of the coils on the driver side. So when I moved the cable from 5 to 3 it stayed on the driver side and when I switched the coils back and forth it stayed on...
  21. R

    Stutters and backfires - clogged cats?

    Both times when I had it all torn down, and when I had the head off the second time I used new fel-pro head gaskets and bolts, the multi layer metal gaskets. The only gasket I ever reused on this motor was the intake manifold gaskets when the head was off the second time, as they had just been...
  22. R

    Stutters and backfires - clogged cats?

    I have read about this, but what am I actually looking for? It running better after its unplugged or it will backfire out the O2 bung? I read another forum they told them to do the same thing pull the sensor and leave it plugged in, but never quantified what to observe.
  23. R

    Stutters and backfires - clogged cats?

    I got a new ECM/TCM from Black Bear with AFM delete and 89 tune for the summit cam. Its on its way to my buddys shop right now actually, he will do compression, fuel pressure, and all that. I dont have time to work on it right now and I need it up. As soon as I get info from him I will update...
  24. R

    Stutters and backfires - clogged cats?

    About a year ago, everything in tank was replaced, injectors though are unknown age. Plugs were done when the AFM delete was done so maybe 3 weeks ago now. Wires are unknown age, and one of them, No 7, isnt part of the set. I read on a different page that a dead cat could cause similar issues...
  25. R

    Rattle

    @Crcz71 did you ever find out what was rattling in your exhaust?

Forum statistics

Threads
129,389
Posts
1,815,256
Members
92,575
Latest member
drewlester77

Latest posts

Top