Cardboardcat15 Posted October 30, 2012 Report Share Posted October 30, 2012 Ok, so before I begin I want it to be known that I know little about engine/performance, so bear with me. For a while now, my engine has made this noticeable crackling sound when I accelerate anywhere, and gets louder as I accelerate uphill. For a while I didn't really think much of it, but just recently when I was driving uphill and smoke came out of the tailpipe while I hear the crackling I began to worry. This crackling sounds almost like little BB gun pellets bouncing around in my engine. It gets worse on hot days, especially on inclines. I've tried to find out what this sound is exactly, and so far I've found this video about spark knock. The sound is just about dead on to what my car is sounding like. Does anyone here have any experience with fixing spark knock? And does anyone think this is what I could have? If I could find my camera I'd a take a video to catch the sound. Mechanic said the smoke may have been possible blow-by. He checked all my fluid levels and for any oil/water mixture. Everything was fine, so the head gasket seems to be fine. From what I've read online, I may need a new EGR Valve. Also a knock sensor could need replacement, but I'm not too sure my engine has one. Also it's recommended that I use higher octane gas, but I can't see why my tiny 1.6 non performance engine would need high octane fuel. Also said there could be carbon buildup on the pistons, but I'm not sure how to fix that. Thoughts? Sorry for the TLDR post. My Channel on YouTube. Check it out for cinematic-style Car Audio videos. https://www.youtube.com/channel/UCcSMhtT-rpopJbdybubDgnQ New 2014 Scion TC 4th Wall Build https://www.stevemeadedesigns.com/board/topic/217173-2014-tc-4th-order-build-3-fi-sp4-15s/ Link to comment Share on other sites More sharing options...
EricM9104 Posted October 30, 2012 Report Share Posted October 30, 2012 Spark knock occurs when the combustion chamber gets hot enough to the point where the fuel in the chamber ignites before the spark ignites it. Higher octane fuel helps. Carbon build-up will also attribute, do you know what CR of your engine is? What car exactly? 2015 Honda Civic LX 4dr | 24k miles Stock H/U and mids/highs Power Acoustik GW3-12" D2 Sub HiFonics BXX1200.1D @ 1ohm Random 2.5^3' dual ported box NVX LOC Stinger wiring throughout 1977 Chevy SWB Cammed 350 Dual exhaust Cheap Wish stereo Link to comment Share on other sites More sharing options...
Cardboardcat15 Posted October 30, 2012 Author Report Share Posted October 30, 2012 Car is 1992 Corolla, 4AFE engine. I think I'm going to try and clean my EGR valve today. CR is 9.5:1. Thanks for the reply. From what I;ve read this can be very harmful to the engine over time. My Channel on YouTube. Check it out for cinematic-style Car Audio videos. https://www.youtube.com/channel/UCcSMhtT-rpopJbdybubDgnQ New 2014 Scion TC 4th Wall Build https://www.stevemeadedesigns.com/board/topic/217173-2014-tc-4th-order-build-3-fi-sp4-15s/ Link to comment Share on other sites More sharing options...
EricM9104 Posted October 31, 2012 Report Share Posted October 31, 2012 What grade fuel are you running? 2015 Honda Civic LX 4dr | 24k miles Stock H/U and mids/highs Power Acoustik GW3-12" D2 Sub HiFonics BXX1200.1D @ 1ohm Random 2.5^3' dual ported box NVX LOC Stinger wiring throughout 1977 Chevy SWB Cammed 350 Dual exhaust Cheap Wish stereo Link to comment Share on other sites More sharing options...
Cardboardcat15 Posted October 31, 2012 Author Report Share Posted October 31, 2012 Right now I'm running (and have been) running 87. My Channel on YouTube. Check it out for cinematic-style Car Audio videos. https://www.youtube.com/channel/UCcSMhtT-rpopJbdybubDgnQ New 2014 Scion TC 4th Wall Build https://www.stevemeadedesigns.com/board/topic/217173-2014-tc-4th-order-build-3-fi-sp4-15s/ Link to comment Share on other sites More sharing options...
HatersGonnaHate Posted October 31, 2012 Report Share Posted October 31, 2012 Sadly, if you run the higher grades of gas, it reduces the risk of engine knock occurring. My name is AdamThis is my Civic Build.7" Samsung Tab 2Kenwood KDC-X896Clarion EQS746Sundown X-15DC 3.5k @2ohmHatersGonnaHate's 02 Civic UBLELD Bypass for Honda Civic/Accord/FitDon's Jeep Grand Cherokee Rebuild N8ball2013 - i think you'd stick your dick in a blender if it told you it was 40 wtih two kids your age. lol srp365 - If posting were picking up bitches, I'd be going home single tonight looks like tony montana sneezed in your car. Link to comment Share on other sites More sharing options...
OrionStang Posted October 31, 2012 Report Share Posted October 31, 2012 Higher octane will not help. The cars made to run on 87, run 87. SMD Super Seller My Feedback Thread Link to comment Share on other sites More sharing options...
OrionStang Posted October 31, 2012 Report Share Posted October 31, 2012 Is it a click noise, or a 'knock on a door' noise. The former would be a valve issue, the latter a rod bearing issue. On that car, not worth fixing. New motor or new car time. SMD Super Seller My Feedback Thread Link to comment Share on other sites More sharing options...
HatersGonnaHate Posted October 31, 2012 Report Share Posted October 31, 2012 On that car, not worth fixing. New motor or new car time. This is gonna be the best bet. Being that old, it's gonna be a matter of time before the entire engine takes a dump. Either find a donor car to pull a better motor from, or look for a new car. My name is AdamThis is my Civic Build.7" Samsung Tab 2Kenwood KDC-X896Clarion EQS746Sundown X-15DC 3.5k @2ohmHatersGonnaHate's 02 Civic UBLELD Bypass for Honda Civic/Accord/FitDon's Jeep Grand Cherokee Rebuild N8ball2013 - i think you'd stick your dick in a blender if it told you it was 40 wtih two kids your age. lol srp365 - If posting were picking up bitches, I'd be going home single tonight looks like tony montana sneezed in your car. Link to comment Share on other sites More sharing options...
kalilac619 Posted October 31, 2012 Report Share Posted October 31, 2012 sounds like detonation from carbon build or your timing is off id check timing belt couldve skipped a tooth 2000 Suburban 6 runs of 2/0 12 timpano audio mids,6 timpana audio tweets and 1 timpano compression horn per door 8 banks of blue Maxwells + 260ah of Yin Long LTOs 2 370 Amp Autotech Alts mids amps 2 Crescendo Skyway 3ks Tweet amp Crossfire 2000.4 sub amp: 4 Crossfire XT 8ks Subs: 8 18 in Crossfires in a 4th order Best Scores at events… 161.6@38hz DBdrag sealed on the dash… 162.54 outlaw…161.14 Meca headrest Link to comment Share on other sites More sharing options...
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