RE: Idles rough with a knock...
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RE: Idles rough with a knock... - 10/22/2007 9:00:10 AM
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otnietdehoooo
The Chop Shop Moderator
Posts: 1627
Joined: 5/25/2007
From: Ft. Worth, TX
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i really wanted the AEM cai. i dont know if you have seen it but they have a thing you can dowload off of their website, its the test results from an independent research group. they tested 4 of the leading air filter companies and the dryflow outperformed all of them. however i got my K&N for about $70 less than the AEM... i might eventually try to get a dryflow filter on my K&N however the filter that i have is 5" long while the dryflow filter on the blazer cai is 9" long
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Matt - 98 4DR 4WD
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RE: Idles rough with a knock... - 10/22/2007 9:07:57 AM
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drperry
Posts: 3901
Joined: 1/12/2007
From: GP AB CA
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DryFlow rocks... No oiling! lol
Not sure what the cleaning process is on the K&N, but the AEM just needs a couple bottles of cleaning stuff and a 5 gallon or so pail of water...
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RE: Idles rough with a knock... - 10/22/2007 9:37:38 AM
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blazinloud
Posts: 2425
Joined: 2/8/2006
From: Saskatoon, Canada
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K&N's are the same deal. I wash and oil mine about once a year.
I just got my fuel system cleaned, and then I went out yesterday to "drive it like I stole it" and I think I mighta fudged my tranny 
I'm crossing my fingers tho......I've never felt a tranny slip before, so I hope my truck was just trippin out. from 1st to 2nd a couple times it seemed like the rpm dropped right when it tryed to shift.
but dr.perry I was happy with what Mr.lube does in their cleaning service.
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RE: Idles rough with a knock... - 10/22/2007 9:51:05 AM
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drperry
Posts: 3901
Joined: 1/12/2007
From: GP AB CA
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quote:
ORIGINAL: blazinloud
but dr.perry I was happy with what Mr.lube does in their cleaning service.
But but but but! It's fun smoking out the block!
edit:
Here's what it sounds like, at any rate... Click Here
< Message edited by drperry -- 10/23/2007 2:53:48 AM >
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RE: Idles rough with a knock... - 10/23/2007 6:07:58 PM
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drperry
Posts: 3901
Joined: 1/12/2007
From: GP AB CA
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Update:
Well, the seafoam didn't change anything... gonna try to do an oil change after work, or if I'm to tired, tomorrow afternoon when I wake up...
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RE: Idles rough with a knock... - 10/26/2007 8:15:43 PM
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Swain
Posts: 75
Joined: 8/9/2007
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You've probably already checked this but it isn't your PCV valve clapping together is it? Mine did that once and I shook it a bit and it stopped.
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RE: Idles rough with a knock... - 11/17/2007 5:41:34 AM
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drperry
Posts: 3901
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From: GP AB CA
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It's not the PCV valve... The noise is too "deep" for that... and you can hear it clearest when you stick your head by the front wheels...
I'm definitely checking out my distributor and cap + rotor tomorrow... or maybe I should just replace them on principle... I'll probably do that, depending on prices... might take a couple days extra, lol.
Because if it's not that, then I just might have a coolant leak into the engine... 
I'll also pull a plug and see what she looks like, and load up a pic here, and see what the experts have to say..
I'm really leaning towards distributor cap + rotor, because that's such an easy fix, and don't want to do any gaskets, lol...
But as I said in the first post... the problem was gone for a few days after I changed the plugs, would that make the dist. a more likely culprit?
< Message edited by drperry -- 11/17/2007 5:46:36 AM >
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RE: Idles rough with a knock... - 11/17/2007 6:06:49 AM
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igot10pinitis
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Joined: 6/3/2007
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i don't think plugs or rotor will help. It sounds like a lifter tapping, or something internal.
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RE: Idles rough with a knock... - 11/19/2007 2:07:48 PM
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drperry
Posts: 3901
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From: GP AB CA
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Side note... Did a random scan of the trouble codes... No SES light, but there was a low voltage MAF or whatever it is... P0102 or something like that... Hopefully it's a leftover from when I did the seafoam treatment, as I didn't clear the codes, lol...
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RE: Idles rough with a knock... - 11/19/2007 10:16:05 PM
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Chevy Lover
General Tech Moderator
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From: Vancouver. B.C. Canada
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any contamination or debris on the sensing elements of the MAF sensor will set a code P0102
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RE: Idles rough with a knock... - 11/20/2007 1:17:01 AM
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drperry
Posts: 3901
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From: GP AB CA
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I think it was just a hold over from running it without it plugged in for the seafoam treatment... as the SES light wasn't on...
I dumped in a bunch of injector cleaner, and it seems to run better/smoother... still a bit of a miss and a knock, but not quite as bad...
Hopefully the fuel filter finishes it off...
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RE: Idles rough with a knock... - 11/22/2007 10:37:21 AM
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SillyLittleBlazer
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How much of a chance is there of fouling the plugs up when using seafoam? I just changed the plugs (ac delco $5.88 a piece) 10,000 miles ago, dont want to fudge them up
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2004 blazer 4dr 4wd 4.3
Pioneer DEH-P5900IB
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RE: Idles rough with a knock... - 11/22/2007 10:55:26 AM
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drperry
Posts: 3901
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From: GP AB CA
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They might be good enough that they'll be unaffected...
If you still have your old plugs, you can always swap them in...
Since the problem has gotten a little bit better, with the injector cleaner, it's pretty much confirmed that it's a spark, or fuel issue...
It doesn't start missing until it hits low idle, once it does, it always misses, until it cools down again... Maybe I should get my battery/alternator tested, lol.
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