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Sorry if this has been addressed in another topic but I can't seem to find a problem quite like mine.

The engine used to start normally, almost stall, then come back to normal idle, with a consistent miss until the engine had run for half a minute. I checked the coil pack and there was a crack so I replaced it. The problem persisted. So I removed the IAC and HOLY CRAP! Dirt and grit so thick you couldnt fit a finger inside. So I cleaned it and put a little lube on the valve. Immediately the problem got WORSE. Now the car will start and run rough (~300-400 RPM) for over 10 seconds, bucking like a mad bull, no pun intended. It will eventually come up to normal idle on it's own but I usually tap the gas which brings it up right away. Then it starts the consistent miss again. I checked the IAC again and everything's good. I am not getting any codes. At this point I'm thinking a bad head gasket but I wanted some opinions before I do a compression test.
 

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I am facing the exact problem myself. At first i believed it was the IAC or the MAF sensor, so i got a new IAC and cleaned my Maf out, with no luck.

My car still bogs around 400-500RPM until i give it some gas at startup. I was thinking about changing the plugs and wires also, but i know that isnt the real problem.

Have you looked at the Coolant Temperature Sensor yet? Can you smell gas (Rich) during start up?

I just realized yesterday that my problems may have been caused from my coolant temperature sensor. My car usually stalls on Very hot days, as well as when it is very cold out. I don't know if you have the same, but definitely check out your Cooling system as well. Might just be the same thing i have. :(

Also test your thermostat.

the CTS sensor is only $20.00 and worth a shot.
 

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Okay, I actually got a video of it acting up. Not as rough as it usually is.
<object width="425" height="350"><param name="movie" value="http://www.youtube.com/v/<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/I0mTe7SRn5I&hl=en&fs=1&rel=0"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/I0mTe7SRn5I&hl=en&fs=1&rel=0" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/I0mTe7SRn5I&hl=en&fs=1&rel=0"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/I0mTe7SRn5I&hl=en&fs=1&rel=0" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"></embed></object>

I'm not worried about the belt squeal. It does that whenever it's wet out or excessively humid.
 

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QUOTE (Angrod @ Jun 17 2009, 09:44 PM) index.php?act=findpost&pid=733125
Okay, I actually got a video of it acting up. Not as rough as it usually is.
<object width="425" height="350"><param name="movie" value="http://www.youtube.com/v/<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/I0mTe7SRn5I&hl=en&fs=1&rel=0"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/I0mTe7SRn5I&hl=en&fs=1&rel=0" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/I0mTe7SRn5I&hl=en&fs=1&rel=0"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/I0mTe7SRn5I&hl=en&fs=1&rel=0" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"></embed></object>

I'm not worried about the belt squeal. It does that whenever it's wet out or excessively humid.[/b]
Hmm, mine was doing that and really running rich but with no codes. I did the haynes manual check for MAF and it was not quite right. I read you need to really check it with a oscilloscope to be sure which I did not have so I brought it down to the stealer ship and had them run a full diagnosticsd on it and came back with a bad MAF. Was making the car think it is running in high elevations. $185 later the car runs great. Now I don't have that weird drop at start, whihc only happend after the car sat over night.
 

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QUOTE (I own a Torres :) @ Jun 22 2009, 01:06 PM) index.php?act=findpost&pid=734241
Hmm, mine was doing that and really running rich but with no codes. I did the haynes manual check for MAF and it was not quite right. I read you need to really check it with a oscilloscope to be sure which I did not have so I brought it down to the stealer ship and had them run a full diagnosticsd on it and came back with a bad MAF. Was making the car think it is running in high elevations. $185 later the car runs great. Now I don't have that weird drop at start, whihc only happend after the car sat over night.[/b]
I'm going to have the 105,000 mile check up and service done soon and I was going to have the shop check the EGR system. I'll have them check the MAF while they're at it. Just so long as the stumble goes away and I don't have to wait 1+ minutes before the tach falls below 1000 RPM.
 

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Start with the basics. When was the fuel filter last changed? If you can't remember or it was over two years ago, it's time to do it again. Low fuel pressure, especially on start up does not usually show up as a code. Once running the pressure builds up and the engine runs better after a few minutes.
 
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