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Old 15 Jan 2016, 03:08 pm
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Default low idle

My idle is low, about 750 rpm alot of vibration on engine otherwise runs ok, 127000 mi, I replaced the idle sensor it seemed better for 1 day no codes what next
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Old 15 Jan 2016, 03:17 pm
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Default Re: low idle

750 isn't that low. Did the vibration start after any major work like a timing belt change?
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Old 15 Jan 2016, 03:38 pm
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Default Re: low idle

I felt it more after the motor mount was replced
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Old 15 Jan 2016, 03:42 pm
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Default Re: low idle

Also the car is stock and I had the fuel system cleaned and trotted body cleaned, no change, the timing belt was done about a year ago
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Old 15 Jan 2016, 03:48 pm
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Default Re: low idle

I just checked and have a po325 code
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Old 15 Jan 2016, 03:55 pm
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Default Re: low idle

Quote:
Originally Posted by jimbarto View Post
I felt it more after the motor mount was replced
If the exact FACTORY INSTALLATION procedure is not followed for replacement of the upper and lower common engine mounts you will get vibration.

As for your DTC clear it and see if returns.

Please watch your engine coolant temperatures during your clearing and rechecking for DTC's. You may also check that your coolant reservoir has the proper amount of fluid.

The idle speed of 750rpm in park or neutral is a good speed.
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Old 15 Jan 2016, 04:20 pm
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Default Re: low idle

Also the idle is rough and if you are sitting at a light in drive foot on the brake it will stumble and the go back up to 750 and then stumble again
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Old 15 Jan 2016, 04:38 pm
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Default Re: low idle

Quote:
Originally Posted by jimbarto View Post
I just checked and have a po325 code
I think that is the knock sensor. Nitro knows what he is talking about. I'm not sure if it is why he stresses being conscious of your coolant level and temps, but I had recurring coolant leaks my car threw that code a few times. I'm not sure if they were related, but I never did anything to the knock sensor and the code cleared on its own and hasn't returned.
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Old 15 Jan 2016, 06:59 pm
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Default Re: low idle

Quote:
Originally Posted by Fk5 View Post
I think that is the knock sensor. Nitro knows what he is talking about. I'm not sure if it is why he stresses being conscious of your coolant level and temps, but I had recurring coolant leaks my car threw that code a few times. I'm not sure if they were related, but I never did anything to the knock sensor and the code cleared on its own and hasn't returned.
Actually with more posted information it sounds more like the IAC or maybe an overlooked vacuum leak. But that would be purely a guess on my part that I rarely do on forums. But you entertained a reason why I suggested watching some thing.

The reason to watch the coolant temperatures are if it is the knock sensor at fault than normal timing and fueling perimeters in the PCM can be interrupted causing a lean condition raising both the EGT's and combustion chamber temperatures which may cause the coolant temperature to raise very quickly.
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Last edited by NitroPT; 15 Jan 2016 at 07:03 pm.
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Old 15 Jan 2016, 10:03 pm
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Default Re: low idle

P0325 - Knock Sensor No. 1 Circuit Conditions

Possible Causes:

1. Knock Sensor connector is damaged or shorted
2. Knock Sensor signal circuit open or grounded
3. Knock Sensor signal circuit shorted to return circuit
4. Knock Sensor return circuit is open
5. Knock Sensor not tightened properly
6. Knock Sensor damaged or has failed
7. PCM has failed

If after resetting your DTC's you get the P0325 code back again I would suggest you check the wiring and connector going to your knock sensor.
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