well im having problems and i have no clues whats causing it......... when i am running in the 1000-2000 Rpm range, it sounds like something is rattling bad (not like clunk clunk but a drone of rattling if you know what i mean) , i opened up the hood to see if it was something obvious but that didnt work.......help would be appreciated
thanx in advance, Ryan
4.3L 00' sierra AKA slo (the W still hasnt caught up yet)
gibson exhaust system
Hypertech tune
Internally broken cat? Broken flywheel? Bad torque convertor? I'd start with removing the fan belt and start it up to listen for noise. Next, pull the starter and unbolt the convertor and push it backwards out of the way, re-install the starter and check for noise. Disconnect the exhaust before the cats and see if the noise goes away, that is if you can still hear it over the drone of the wide open pipes. Last thing to check is the flywheel but that means pulling the engine or trans. If it's not any of the above..... OUCH!
Oh yeah, might pull the valve covers and check for a bent push rod but I doubt that would make the noise you're describing.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
what about a broke baffle in the muffler...what kind do you have...
'13 silverado LT...stock
'11 lt 4x4 z71..tvs1900
'01 gmc twins 6.0 jakes 400 ladder bars w/ coilovers tuned by nelson performance
I'm thinking something loose on your exhaust, i.e. broken exhaust hanger. Check your belt tensioner and pulley too.
[1/8 mile E.T. - 8.23 @ 82.86 mph w/1.82 60'] '98swb,4/6drop,20"RozziDeeps on 275/40ToyoProxes '98LS1/4L60E,TRCheaTR cam,Ported TB,Billet MAF ends,MSD8.5 superconductor wires,S&P midlengths,!EGR,!cats,2 1/2" true duals w/X-pipe,Dynomax Ultraflows,TCI 3000,billet servo,TCI deep aluminum pan,3.73's w/Auburn posi; Eclipse CD, Rockford 6 1/2's, Memphis 12's, Punch 200 ix, Punch 500x
<div class='quotetop'>QUOTE(motoxlifer @ Jun 4 2006, 12:52 PM) [snapback]54713[/snapback]</div>That is what it was on my neighbor's truck.Check your belt tensioner
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Gone, but not forgotten!
Thanx for the info guys, sorry i couldnt respond in a timely manner but im up at a football camp and this is the only time ive gotten to get near a computer.......i'll try these things and tell yall if it gets better
thanx in advance, Ryan
4.3L 00' sierra AKA slo (the W still hasnt caught up yet)
gibson exhaust system
Hypertech tune
Well since i put on the new exhaust system the other day the problem has disappeared, so it must have been the exhaust. Thanks for the help
4.3L 00' sierra AKA slo (the W still hasnt caught up yet)
gibson exhaust system
Hypertech tune
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