Just installed AWR front motor mount, idle rpms higher?

You sure it's not just when you first start the car? It is normal for high rpms during warmup. Once coolant gets to temp, should be about 750
 
peepsalot said:
You sure it's not just when you first start the car? It is normal for high rpms during warmup. Once coolant gets to temp, should be about 750

yeah now i just checked it and its lower than it should be, wtf damn it its around like 400
 
hear hear

I agree, every 4 cylinder I have ever driven has always idled @ around 1100 rpm's.
 
our ecu is designed to idle at 700 rpm at full engine temp (MSP, but P5 and 3rd gen sedan is the same I think). I see it bounce around between 690 and 710 usually (digital gauges). ... if the compressor (A/C or windshield) or anther load is on, the idle will be around 800, maybe as high as 850. I don't know what effect underdrive pulleys would have on the idle, but I think the ecu would compensate.

If you're not idling at these rpm's, there's something else going on that is making it abnormal - egr valve maybe, vacuum leak, glogged air or fuel filter, bad O2 sensor maybe(?) ...

EDIT: there's no way that installing a motor mount would do anything at all to your idle, unless you bumped something else in the process. Did you install it from below? If you installed it from above you might have bumped the O2 wires.
 
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tiwing said:
our ecu is designed to idle at 700 rpm at full engine temp (MSP, but P5 and 3rd gen sedan is the same I think). I see it bounce around between 690 and 710 usually (digital gauges). ... if the compressor (A/C or windshield) or anther load is on, the idle will be around 800, maybe as high as 850. I don't know what effect underdrive pulleys would have on the idle, but I think the ecu would compensate.

If you're not idling at these rpm's, there's something else going on that is making it abnormal - egr valve maybe, vacuum leak, glogged air or fuel filter, bad O2 sensor maybe(?) ...

EDIT: there's no way that installing a motor mount would do anything at all to your idle, unless you bumped something else in the process. Did you install it from below? If you installed it from above you might have bumped the O2 wires.

it seems to be alright, its back to being around 750, thanks guys i appreciate it
 
tiwing said:
our ecu is designed to idle at 700 rpm at full engine temp (MSP, but P5 and 3rd gen sedan is the same I think). I see it bounce around between 690 and 710 usually (digital gauges). ... if the compressor (A/C or windshield) or anther load is on, the idle will be around 800, maybe as high as 850. I don't know what effect underdrive pulleys would have on the idle, but I think the ecu would compensate.

If you're not idling at these rpm's, there's something else going on that is making it abnormal - egr valve maybe, vacuum leak, glogged air or fuel filter, bad O2 sensor maybe(?) ...

EDIT: there's no way that installing a motor mount would do anything at all to your idle, unless you bumped something else in the process. Did you install it from below? If you installed it from above you might have bumped the O2 wires.

it seems to be alright, its back to being around 750, thanks guys i appreciate it
 
after installing my injen and turbohoses smic/hardpipes kit, my idle dropped from about 700rpm to about 500-600rpm. it doesn't bounce up and down much, just sits there.
 
ChopstickHero said:
after installing my injen and turbohoses smic/hardpipes kit, my idle dropped from about 700rpm to about 500-600rpm. it doesn't bounce up and down much, just sits there.
doesn't it shake like hell? I know that around 700-750 my exhaust is almost hitting the bumper it's shaking so much and the shift knob is a blur
 
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