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06-10-2011
To summarize, here is a list of my problems:
- Engine runs very rough and shakes
- Loud tapping noise (sounds like valve cover, but I don't know)
- Huge amounts of knock retard at low speeds
- Bogs down/surges at higher RPM's, leaving me with no power (especially after 3000 RPM)
- Feels like it hits the rev limiter at 4000 RPM
- Takes an extra second to start up, kind of stumbles a bit
- No DTC's
06-10-2011
Find knocking noise first.
06-10-2011
the knocking sound youre hearing is causing your high KR readings. knock sensors 'hear' things so any knocking sound the motor is making will be reproduced as KR. like matt said, find what's knocking.
06-10-2011
maybe a loose rocker? Garden hose to your ear could help find the knock.
http://www.streetfire.net/video/2001...ynp_208097.htm
06-10-2011
^^Dowl rods work really great as well since they are skinny.
06-10-2011
i just bought a $15 stethascope specifically for autos. works great for pinpointing noises. got mine at sears
maybe you can use that to find your source of noise.
06-10-2011
LOL...just sayin...
I could make a damn tower for $15.
Buy.com - Wooden Dowel Rods 12"" 12/Pkg-
06-10-2011
A long screwdriver works just as well, and i'm sure you have one or could find one.
06-12-2011
What's the most probable cause of a frequent tapping noise? Lifters? Would tapping lifters cause a huge problem like the one I'm having? I'm having a lot of trouble figuring it out.
Last edited by Bedwards; 06-12-2011 at 02:11 PM.
06-12-2011
make a vid of the noise, from under the hood this time. move the camera around different places maybe someone can pinpoint the noise type.
06-12-2011
You can really here the tapping in the second video.
164d655b.mp4 video by Bedwards923 - Photobucket
a5fa71d3.mp4 video by Bedwards923 - Photobucket
06-12-2011
I looked underneath by my harmonic balancer, and the belt seems to have quite a bit of movement underneath the pulley, going towards the AC compressor. It flaps quite a bit down there. Not sure how much movement is acceptable.
06-12-2011
with how fast its knocking its valvetrain forsure. My guess would be rockers
http://www.streetfire.net/video/2001...ynp_208097.htm
06-12-2011
yea its the rockers. they aren't torqued to specs. same thing happened to a friend who did a s1x cam and his car misfired and ticked.
06-12-2011
I'd say rockers. I did the same thing when i changed my wifes lim in her grand am
06-12-2011
I just checked the front valve cover. All the rockers are torqued properly. Started it up, and they sound and look fine. I started it up with the cover off and it seems like the sound is coming from the belt area. My tensioner pulley is bouncing around like crazy. I'm not sure if it's something internal causing that or not.
06-12-2011
have you removed the belt yet to see if the ticking goes away?
a bad a/c clutch can and will snap a belt if its going, and makes a good deal of noise. happened on my truck when the compressor went bad, a/c still worked but the belts kept on breaking till i got a new compressor.
06-12-2011
Removed belt and ran it. Same noise. I'm so ****ing fed up. I ****ing hate this car right now.
06-12-2011
If the balance shaft was out of sprocket alignment, could it cause this? My shakes so bad. I swore I lined it up though.
Last edited by Bedwards; 06-12-2011 at 06:37 PM.
06-12-2011
I watched your videos, and I have never seen a supercharger belt also go around the alt., usually the supercharger belt is stand alone, maybe it has somthing to do with the pulley?
Anyway, from watching your vidoes I can say it sounds like its running on 5 cylinders, and judging by the "kickback" when cranking the engine, there is a good possibility the firing order is not correct, point being, there is an ignition anomoly, timing, fireing order, bad plug, burt/broken wire... or somthing.
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