rough idle

  1. 98sub1500

    5.7 v8 rough idle, hesitation and shudders in reverse and drive only

    First off, I drive a 1998 GMC Suburban K1500 SLE with the 5.7 V8. Not too long ago I had the rear drums checked, front brakes replaced and a brake fluid flush. Since then, never before, for some reason I have the occasional shudder/hesitation while on the accelerator and a rough idle ONLY in...
  2. TheTruckOfTheseus

    2000 k2500 7.4 rough idle + p0174 code

    i bought a 2000 ccsb 7.4L k2500 a few months back. 238k miles, sat still for a year with a start here and there. it was in really good condition both inside and out and a good price so i couldn’t resist. the gentleman i bought it from said he had some issues with it not running right, so he...
  3. J

    Issues with 1994 k1500

    Apology in advance long thread. Hey guys, new to this forum because this truck has got me stumped. It’s a 94, 350TBI. And 4l60e. Truck is very solid , and I’d like to keep it around for awhile I’ve had it for about a month. So to start things off truck has a rough idle when cold, will come out...
  4. 2

    99 k3500 454 stumbles at idle and taking off from stops

    I had a previous post talking about my truck going though distributors caps to recap that I had the same issue twice loss of power and missing. First time truck started shaking and loss power and eventually no start it was pretty clear that it was missing very bad so I did plugs, wires, and...
  5. Beetlejuice

    Engine knocking

    Im getting codes 31,32,33,34,41,43,51,52,54, and 55. No matter what the timing’s set at it knocks but it wasn’t doing that before I tweaked with the timing. I’m wondering if my ECM’s bad or something I know that’s an easy thing to blame it on but the motor’s only got 99k miles on it I’ve been...
  6. Beetlejuice

    ‘88 Sierra engine’s knocking, timings right at 0° no CEL but i have 7 codes on my code reader (images below)

  7. Z

    Hard/No start then runs fine

    I have been dealing with an issue that turned out to be a seized IAC valve causing it to bog down on decel or at a stoplight. It would bog down only for a few seconds, except at highway speed, then go right back to normal idle. It would almost sound as if it had a lopey cam in it. Since fixing...
  8. OB1214

    Shaky Idle

    Hello all! Hope You are having a great day. I was hoping you guys could potentially help with a slight dilemma I have. I have a 1996 k3500 with a Vortec 454. Ever since I bought my truck back in August I've had a slight shake in my idle nothing serious just something that annoys me when I'm at a...
  9. obswill

    1994 c1500 350tbi surging idle

    1994 Chevy c1500 5.7 TBI I’ve been chasing and intermittent misfire and loping idle with my truck. I replaced and tested the Engine coolant temp sensor New EGR and solenoid. New MAP sensor New IAC New TPS Replaced all fuel lines, new pump, rebuilt throttle body (with gaskets) new...
  10. Bigred81

    Need help reading these numbers / rough idle

    1999 CK1500 suburban 5.7 liter 4X4 with 245,000 miles. First thing. I’m almost at rock bottom in life. So much going on. I could really use some help figuring this out. 3 months ago I wanted to fix exhaust leak, oil leaks. I replaced Oil cooler lines, Oil Pan Gasket, Oil Pump, Timing Cover. I...
  11. zer0Limitz

    IAC Issue? Rough idle in park & in drive. Please Help!

    I have a 97 Sierra SLE 5.7L 157k miles. Just fired the truck up today after maybe a month of sitting. I took it for a drive and once I got to a stop light I noticed the truck was running rough while idling (I'm fully stopped pressing brake at traffic light). I almost thought it was about to...
  12. Raspi454

    99 350 vortec rough idle

    I'm not any good at diagnosis, but my 350 vortec doesn't idle nicely, cold or warm. It kinda pulses(?) or it seems like it has a cam in a way, If that makes sense. Going down the road if seems to do alright, but as soon as it idles it's not nice. What do you fellas think? IAC, tune up, something...
  13. Manmeyco

    1997 K2500 454 Rough Idle, Loud Afterfire

    I have a '97 K2500 with the 454. Simply put, it doesn't idle right. When I start it up cold, it revs up to 2000 RPM, slowly settles to idle, and then either abruptly dies or practically dies before roaring right back up and going through it again. In order to keep it on I hold the gas slightly...

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