MustangWorks.com : Ford Forums - View Single Post - Popping sound @ Idle when engine cold, any ideas??

green94droptop · 05-29-2001, 08:43 PM

I have that same noise at start up when car has been sitting for a while.

Been told that it has something to do with the smog pump warming up the car.

But mine didn't start to do it 'till I put in my o/r h-pipe.

Don't thing it causes any harm though.

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Green '94 GT conv. -- K&N filter charger, FMS 9mm wires, Accel hipo cap/rotor, 180* thermo, 14* timing, off road H-pipe in front of 2 chamber flow's, and still workin' on the rest!

05-29-2001, 08:43 PM	#2
green94droptop Registered Member Join Date: May 2001 Location: Central FL Posts: 59	I have that same noise at start up when car has been sitting for a while. Been told that it has something to do with the smog pump warming up the car. But mine didn't start to do it 'till I put in my o/r h-pipe. Don't thing it causes any harm though. ------------------ Green '94 GT conv. -- K&N filter charger, FMS 9mm wires, Accel hipo cap/rotor, 180* thermo, 14* timing, off road H-pipe in front of 2 chamber flow's, and still workin' on the rest!