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  1. Dan12valve

    Problems with heat in 1996 C1500

    Also look at the condensation drain below the dryer for the a/c. If coolant is pouring out definitely a heater core. If all you saw was it coming out of the vents and no where else on the truck, that's another box ticked for the core. I assume it's not leaving wet spots on the ground?
  2. Dan12valve

    1988 GMC rough idle, no power, stalls

    Disconnect a sensor like the tps or map. May be upset for a moment. It will stop reading the chip in the computer and kick over to the limp chip. See if it stays running. Can also unplug the egr solenoid, if you haven't already. Egr spring gets weak and will cause issues or it can leak.
  3. Dan12valve

    1988 GMC rough idle, no power, stalls

    Is fuel pooling up on the back of the throttle blades while this is happening?
  4. Dan12valve

    Ignition + more problems I fixed w/pics

    Air box back in with duct tape on all the seems just to make sure no leaks. Its a three part deal and not all that complicated. Pulled a vacuum and let the system sit overnight to make sure there are no leaks. And finally, the fruits of my labor. 38* at idle on a particularly hot July...
  5. Dan12valve

    Ignition + more problems I fixed w/pics

    I figured I'd follow up on an old thread I made over a year ago, and add some new things. Maybe it will help someone in the future with these old trucks. Goes over a/c, idle, and ignition issues. http://www.gmt400.com/threads/so-i-blew-my-muffler-up.34756/ TLDR: ignition module issues caused a...
  6. Dan12valve

    So.... I blew my muffler up

    Has always smelled a tiny bit rich for the 40,000 miles or so I've had it. I did check the timing and number one wire was intermittently not firing. And then is just stranded me essentially. Let it cool for a bit and went a few more miles and it started acting up again. So I went for the last...
  7. Dan12valve

    So.... I blew my muffler up

    Only code that shows is from the egr failing its self test. Never anything stored. I wonder why the cat decided to go in such a short time span as well. Gets plenty of fuel, it has always had a slightly rough idle. Enough to feel but not enough to notice outside or hear. I always attributed it...
  8. Dan12valve

    So.... I blew my muffler up

    Lots of recent changes.... my paranoia says cascade failures. 217k miles on the clock. Recently (past 3000 miles) it was losing power on hills and had hesitation with partial throttle which was atributed to the egr. So blocked vacuum line to it. Ran fine for a while then started losing power...
  9. Dan12valve

    So.... I blew my muffler up

    When I got home after and let it cool off for an hour or so it ran like a dream. Issue gone...... Truck has multiple personalities, cant decide whether to be happy or piss in my cheerios.
  10. Dan12valve

    So.... I blew my muffler up

    Ill check timing tomorrow. For some odd reason my timing light is in my diesel:shrug: about 20 minutes away, but I digress. And yes... driving down the Ocoee river comming out of curve and applied partial throttle and BOOM. I seriously thought I blew the engine at 1/3 throttle for about 30...
  11. Dan12valve

    So.... I blew my muffler up

    Simply that, Went to accelerate out of a corner at 1/3 throttle and heard a shotgun go off. Pulled off and the carcass of the muffler dangled helplessly. So clearly a backfire. The rest of the drive home was filled with lots of backfires if i tried to do more than 1/4 throttle without manually...
  12. Dan12valve

    Loss of power above 3krpm

    So it was indeed the kitty, and it was dealt with in the most appropriate manner. A hammer and chisel. Forgot how much power the truck actually had. Thanks for helping a newblet. Next project, fixing fubar'd head on a cummins.
  13. Dan12valve

    Loss of power above 3krpm

    I shall give it a whirl in the morning. Edit: I was tired.
  14. Dan12valve

    Hey from Tennessee

    Im usually around Chattanooga but I am always out doing something. I work on tanks, APCs, and other military vehicles pretty much all the time. I have 2 trucks. A maroon 94 Chevy c1500 RCLB 350 and a 97 Dodge 2500 Cummins that has been modified. Can find me on cumminsforum as well under Dans12v.
  15. Dan12valve

    Loss of power above 3krpm

    So I've been lurking for a while, but that's for an intro later. I have a 94 c1500 5.7 auto 2wd 4.10 gears and a g80. My commute is roughly 75 miles one way through the highways and hills of Tennessee, thus my problem. Recently a series of things have started acting weird. It started loosing...

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