as weird as this may sound, ever since i put my loudmouth on my trans am it has been idling a little lower. when in park it idles at about 600 rpms. once its warmed up though its even lower. when i sit at a stoplight in drive (its an a4 car) it idles at about 490 rpms and has some vibration. is this anything to worry about? thanks

 

i thought stock in gear idle was 500rpm anyway. atap and check as stock tachs arent that accurate to begin with.

 

Mine is a 2002 Z28 A4, bone stock and it idles at 500 rpm without any shake.

 

Same here, 500 at idle in gear. No shaking.

 

500 rpm idle in gear, and somewhat rough.

 

My stock idle in gear was 650 and 750 in park.

 

im not sure what the stock idle is, i just know its a little lower now, and kinda rough. right at 500 when warm and in park, a little lower in drive. so is it not any big deal? i dont remember it being there until after my new lid and loudmouth. i didnt think those would be any real reason, but thats about when it started.

 

Filename = C:\ls1\stock2000.LS1
-40 -19 3 24 46 68 89 111 132 154 176 197 219 240 262 284
In Gear A/C Off 850 850 850 825 775 700 700 700 650 560 550 550 550 550 550 550
In Gear A/C On 850 850 850 825 725 650 650 650 600 560 550 550 550 550 550 550
In Park A/C Off 1050 1050 1050 1000 950 875 825 800 725 650 650 650 650 650 650 650
In Park A/C On 1050 1050 1050 1000 900 800 775 750 675 650 650 650 650 650 650 650

i hope that doesn't get formatted wrong.

 

Mine idles at around 800 in neutral (M6 car) and shakes like hell

 

odd thats a stock a4 file at full temps you should be at 550/550 in park and 650 in gear

 

About 500-550 in gear here, bit a shake at times, really minor.

 

well it sounds like its idling at an ok rpm, (please correct me if im wrong) but is the shaking anything to worry about?