erratic popping snapping sound

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#503632 - October 11th 2011 8:18 pm erratic popping snapping sound
ianchevy newbie Registered: January 24th 2011 12:44 am Posts: 40 Loc: Southern California	Erratic non-continuous popping / snapping type sound in the van. Mechanic took a look today and doesn't know what it is. Checked mufflers & nope, checked ujoints and they are good, is it the transmission?, or the teeth in the rearend? Keep in mind its not continuous and seems to happen under load when I am on the accelerator....??? _________________________
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#503660 - October 11th 2011 9:11 pm Re: erratic popping snapping sound [Re: ianchevy]
loosweel enthusiast Registered: February 27th 2004 12:00 pm Posts: 201 Loc: lake luzerne,N.Y.	Welcome! My experience with Chevy's is limited, I own Dodges now. It might be the cam shaft or even bad gas, just my 2%. Had the camshaft thing happen to one of my Chevy's,did the same thing.
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#503677 - October 11th 2011 9:34 pm Re: erratic popping snapping sound [Re: ianchevy]
aftoyboy old hand Registered: July 20th 2011 1:07 pm Posts: 852 Loc: Las Vegas, NV, US of A	can you point where it's coming from at all. The front or rear? if it's the rear then may need axle work, possibly the brakes... but since under load I'm almost at a loss here, is there any sort of backfiring or misfiring? is it consistent or just random rattling? If it's random rattling I couldn't tell you other than it could be the catalytic converter is stuffed and needs replaced, if it's consistent with RPM's then it's something within the motor but under a load could be tranny. sorry I'm not much help but that my 1 cent. _________________________ Although it seems I walk alone, those foot prints in the sand aren't mine...
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#503680 - October 11th 2011 9:36 pm Re: erratic popping snapping sound [Re: ianchevy]
Vanner68 pooh-bah Registered: December 23rd 2000 12:00 pm Posts: 3433 Loc: Eastpointe, MI ,yewessay	Bubble wrap stuck under the gas pedal? _________________________ Gregg Groff I am the wampeter of my karass. 68 ChevyVan 108 350/3 spd stick 86 Dodge "Yeah, it's got a 318" 08 Chevy HHR Panel Next generation of cool
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#503683 - October 11th 2011 9:48 pm Re: erratic popping snapping sound [Re: ianchevy]
Doc 2% of Canada, EH!!!! Vanner Registered: June 10th 2003 12:00 pm Posts: 12327 Loc: Burlington, On, Canada Eh !!!!	Timing chain skipped a beat? Gets worse under load ? _________________________ I don't need to be honoured by Vanning, I am honoured to be Vanning ! Supporting Vanning, by going Vanning! I hate it, when real life interferes with Vanning ! Ford Lover now in a Ford Body ! 97Errorstar,05 Freestar Van Clan Plus One, Vanning since 1977 ! Ontario Federation Of Truckers (Vanner's) Ottawa Valley Vans Founder,Mixed Bag Truckers Co-Founder,Twisted Truckers,S Joisey, If you don't like my sense of humour,don't read my posts ! Never assemble an engine after BUCKET !!
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#503684 - October 11th 2011 9:50 pm Re: erratic popping snapping sound [Re: ianchevy]
ianchevy newbie Registered: January 24th 2011 12:44 am Posts: 40 Loc: Southern California	The sound is for sure coming from the driveshaft area. Its not really really loud but loud enough to hear at 45 mph. Whats funny is its bad one day and the next not. But the other day on hwy it was really bad. So I know what ever the problem is that its getting worse. Its the type of sound that an experienced mechanic should be able to hear and know what exactly it is. I really hate for it to be the tranny. The ujoint sounds that I am hearing on youtube are not at all like the crackling popping I am hearing. _________________________
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#503685 - October 11th 2011 9:51 pm Re: erratic popping snapping sound [Re: ianchevy]
ianchevy newbie Registered: January 24th 2011 12:44 am Posts: 40 Loc: Southern California	HMMM Doc thats the first someone has mentioned the timing chain. I'll make sure to check that. _________________________
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#503690 - October 11th 2011 10:12 pm Re: erratic popping snapping sound [Re: ianchevy]
Natural_State old hand Registered: February 06th 2006 12:00 pm Posts: 1088 Loc: Fort Wayne, IN	I did sometimes get a "metallic rustling" sound under a load in my Dodge. For me, the sound was attributed to a weak motor mount allowing the engine to torque twist enough for the headers to come into contact with the heat sheilding around the floor pan. There may be other het shields that are loose or coming into contact with movign items. Just another thought for whatever it's worth... look for anything that may be loose, or see shiny metal anywhere that things may have been rubbing or bumping together... Best of Luck... _________________________ How do you know it won't work? Have you tried it, yet?? Mad Anthony Vanners - Looking for more members
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#503729 - October 12th 2011 12:08 am Re: erratic popping snapping sound [Re: Natural_State]
LostSheep pooh-bah Registered: April 13th 2009 6:36 pm Posts: 3464 Loc: Dixie, USA	Neighbors cat?????... _________________________
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#503906 - October 12th 2011 5:25 pm Re: erratic popping snapping sound [Re: ianchevy]
ianchevy newbie Registered: January 24th 2011 12:44 am Posts: 40 Loc: Southern California	IT WAS THE REAR UJOINT!!! hanks guys for all the help. Running smooth now. _________________________
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