2003-04 Mach 1 Registry Owners Club - View Single Post - new to Mach 1, have engine noise.. please read

DrkShadow · 02-09-2011, 09:32 PM

The car doesn't seem to be down on power at all. Never over-revved it, never missed a shift or anything. The strange thing is that the noise isn't as noticeable when free-revving the engine. I only seem to hear it while driving. It was making the noise before the email tune, which is one of the reasons I bought the tuner. I thought it was spark knock. The noise is the same whether cold or hot. I can drive it away from work and hear the noise and then I can get home (20 mins on the highway) and hear it in my neighborhood. I always run 93 octane from a newer gas station near my house, but I've run BP, Exxon, Citgo, etc. and it seems to not make a difference. I'm wondering if the cylinder head is carboned up or something.. anyone had that problem before? I'm also thinking that it could be losing a little oil pressure and slacking the timing chain or losing a lifter.

Any ideas or thoughts are appreciated.

02-09-2011, 09:32 PM	#3
DrkShadow Registered User Join Date: Aug 2010 Location: Abingdon, MD Posts: 68	Re: new to Mach 1, have engine noise.. please read The car doesn't seem to be down on power at all. Never over-revved it, never missed a shift or anything. The strange thing is that the noise isn't as noticeable when free-revving the engine. I only seem to hear it while driving. It was making the noise before the email tune, which is one of the reasons I bought the tuner. I thought it was spark knock. The noise is the same whether cold or hot. I can drive it away from work and hear the noise and then I can get home (20 mins on the highway) and hear it in my neighborhood. I always run 93 octane from a newer gas station near my house, but I've run BP, Exxon, Citgo, etc. and it seems to not make a difference. I'm wondering if the cylinder head is carboned up or something.. anyone had that problem before? I'm also thinking that it could be losing a little oil pressure and slacking the timing chain or losing a lifter. Any ideas or thoughts are appreciated.