Hello everyone, ive spent a good couple days searching and have had no luck seeing if there is any replication of my issue. Hopefully the symptoms will point me in the right direction through some folks more knowledgeable than I engine sounds. It is a Mach 1, and while I have it posted on the Mach 1 forums, I feel the similar engine will get good traffic from the cobra guys as well. This is my first post here, so it all looks foreign to me. Car details at the end of post.
About a week ago, I noticed what sounds like the "marbles in the can" at start up of my car, what seems to be more prominent on the driver side. It happens both cold and fully warm. Thinking it was ping, I should note that it didn't sound the same as what I have experienced as ping before in my mid range with very distinct spark sounds. This sounds like a spark, but not the same spark, more like a buzz. Currently the sound is made both accelerating and decelerating, with or without throttle.
Car is seeming to run normal, vacuum is typical with what I normally see (per "cabin vacuum gauge").
So far the testing has been to remove timing 2* each day. (The car is tuned via AM). Down 6*, i still get the rattle on start up. I think tuning will not be a solution.
It is most audible when starting my car, then it stops, I pull away and it cannot be heard from the cabin. With my windows cracked, I can hear it under low load and below 2.5K rpm next to a wall or barrier in the road. Part of this is making me think it is coming from the bottom, but it it was in the crank/pins, shouldnt it be audible at all times?
Things I want to test:
spark plugs --> if this is causing the issue, what should I be looking for?
COP --> what is the best way to test? I do have access to multi-meters and what have you
Oil Change Coming Up --> heard a bad filter can cause problems
EGR --> how to test, what to look for. Ive heard this too can cause ping like issues.
Anything else you can recommend would be awesome. Time is very limited, so im stuck doing the internet thing for the next couple weeks.
2004 MACH 1
72k on the chassis, about 12k on a re-manufactured engine (practically new)
Stock/Original Clutch
K&N Drop in filter
Prochamber midpipe, bassani catback
NGK G-Power (tr6?) with stock COPs
Thank you!
About a week ago, I noticed what sounds like the "marbles in the can" at start up of my car, what seems to be more prominent on the driver side. It happens both cold and fully warm. Thinking it was ping, I should note that it didn't sound the same as what I have experienced as ping before in my mid range with very distinct spark sounds. This sounds like a spark, but not the same spark, more like a buzz. Currently the sound is made both accelerating and decelerating, with or without throttle.
Car is seeming to run normal, vacuum is typical with what I normally see (per "cabin vacuum gauge").
So far the testing has been to remove timing 2* each day. (The car is tuned via AM). Down 6*, i still get the rattle on start up. I think tuning will not be a solution.
It is most audible when starting my car, then it stops, I pull away and it cannot be heard from the cabin. With my windows cracked, I can hear it under low load and below 2.5K rpm next to a wall or barrier in the road. Part of this is making me think it is coming from the bottom, but it it was in the crank/pins, shouldnt it be audible at all times?
Things I want to test:
spark plugs --> if this is causing the issue, what should I be looking for?
COP --> what is the best way to test? I do have access to multi-meters and what have you
Oil Change Coming Up --> heard a bad filter can cause problems
EGR --> how to test, what to look for. Ive heard this too can cause ping like issues.
Anything else you can recommend would be awesome. Time is very limited, so im stuck doing the internet thing for the next couple weeks.
2004 MACH 1
72k on the chassis, about 12k on a re-manufactured engine (practically new)
Stock/Original Clutch
K&N Drop in filter
Prochamber midpipe, bassani catback
NGK G-Power (tr6?) with stock COPs
Thank you!
