pop and crackles
06-13-2008, 08:44 PM
#12
Multi-Tasking Moderator!
Join Date: Nov 2006
Location: Detroit Rock City!
Posts: 15,618
RE: pop and crackles
I dont think it is the A/F ratio. It is a normal occurance for me only when cold and yes I have an aftermarket side exhaust. I kind of like it....all mean and nasty....I hear many exhaust that sound that way and i feel it is the nature of a modular 3V motor...... I read that equal length shortie headers or LT's will help smooth that out.... JMO but I would not worry.
06-14-2008, 11:02 AM
#14
1st Gear Member
Join Date: Oct 2007
Location: Salinas, CA
Posts: 78
RE: pop and crackles
mfk1988,
I noticed the last line of your post said you were thinking about tinkering with the A/F mixture yourself. I would avoid making those kind of changes yourself unless you are really experienced at tuning these cars.
I noticed the last line of your post said you were thinking about tinkering with the A/F mixture yourself. I would avoid making those kind of changes yourself unless you are really experienced at tuning these cars.
08-23-2008, 01:32 PM
#15
Join Date: Jan 2008
Location:
Posts: 3
I've noticed that when the engine is cold, the RPM's also drop nice and fast, as the engine is closing the throttle 100%. When it warms up after a minute or so, the RPM's drop twice as slow and the crackle/pop in exhaust is gone. I wonder what combination of factors is eliminating the crackle/pop and 100% throttle closure. I've heard it has something to do with emissions, and that is also why when you let off the throttle, it doesn't start decelerating right away either.. Kinda annoying.
08-23-2008, 01:56 PM
#17
Cut & Paste Expert
Join Date: May 2007
Location: NW Arkansas
Posts: 13,322
It will sound like that until the fuel management system goes into closed loop mode.
Usually as soon as the O2 sensors come up to temp and start reading the exhaust gasses correctly for O2 content.
Usually as soon as the O2 sensors come up to temp and start reading the exhaust gasses correctly for O2 content.
