2003 Cavalier - P0300 - Idling funny and shaking when stopped
#1
2003 Cavalier - P0300 - Idling funny and shaking when stopped
The title sums up the symptoms
This has been happening for a couple of weeks now. When I come to a stop it idles funny and shakes. but it all seems fine when the heater is running.
yesterday the check engine light came on and got it checked and got code P0300. I've changed the IAC valve, spark plugs, coil pack and the rubber boots. a few months ago we got a new fuel pump and filter. when it first started shaking we took it to a shop and they checked the vacuum hoses and said that they were fine. I haven't checked cylinder pressure, but it's not spitting smoke out of the exhaust, so I'm hoping that's a good sign.
I'm not very good with cars and any help would be much appreciated.
EDIT: in addition to seeming fine when the heater is running, it only shakes when in gear. when it is in park or neutral it still idles funny but doesn't shake.
This has been happening for a couple of weeks now. When I come to a stop it idles funny and shakes. but it all seems fine when the heater is running.
yesterday the check engine light came on and got it checked and got code P0300. I've changed the IAC valve, spark plugs, coil pack and the rubber boots. a few months ago we got a new fuel pump and filter. when it first started shaking we took it to a shop and they checked the vacuum hoses and said that they were fine. I haven't checked cylinder pressure, but it's not spitting smoke out of the exhaust, so I'm hoping that's a good sign.
I'm not very good with cars and any help would be much appreciated.
EDIT: in addition to seeming fine when the heater is running, it only shakes when in gear. when it is in park or neutral it still idles funny but doesn't shake.
Last edited by Fed51; December 11th, 2011 at 4:02 AM. Reason: additional details
#2
Welcome to the forum. What was the reason for the "new fuel pump and filter" and all the rest that you replaced? What do you mean by heater running? Depending on the air delivery mode, the A/C compressor may run when you turn on the blower. Is the A/C compressor running when it doesn't shake?
#3
fuel pump went out, wife was driving home from work one night and it just died on her.
when I have the heat blowing, and I stop, the idle is stable and the car does not shake. mode doesn't seem to matter, defog, defog/feet, feet/upper body, as long as it's blowing it's calm. and the a/c isn't active. it's winter.
when I have the heat blowing, and I stop, the idle is stable and the car does not shake. mode doesn't seem to matter, defog, defog/feet, feet/upper body, as long as it's blowing it's calm. and the a/c isn't active. it's winter.
#7
Well, here's what I found for the P0300 code...
OBD-II Trouble Code: P0300 Random/Multiple Cylinder Misfire Detected
OBD-II Trouble Code: P0300 Random/Multiple Cylinder Misfire Detected
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#8
My gfs car has the same problem it shakes like crazy when its in drive but stopped at a light. I was thinking that it was a timing chain problem, (which it does have) but maybe it is the tork sensor too. Where is the tork sensor located? how do I test it? and where do I buy one?
#9
Well, here's what I found for the P0300 code...
OBD-II Trouble Code: P0300 Random/Multiple Cylinder Misfire Detected
OBD-II Trouble Code: P0300 Random/Multiple Cylinder Misfire Detected
That is a good link, just book marked that one.. Thanks