Rough Starts When warm MORE INFO
Rough Starts When warm MORE INFO For as long as I care to remember my car has a rough idle on startup. Cold starts are fine but when it starts up warm its just a dog for a second.
My tuner said it is most likely from me over porting my throttle body. Well thats been replaced and I still have the problem.
So now I move onto my O2s. One toggles and one sits dead at 450mv on my interceptor gauge and 360mv on my Fluke.
Another weird thing is that when I unplug the O2s the interceptor is sill showing 450mv. And I switched the O2s from side to side so it makes me believe that my O2s are fine. Im so confused.
The O2s are fairly new since the old ones were nearly dead.
Here are some vids.
STFT1 when warm idle 1-3
STFT2 when warm idle 1-3
When its running crappy right on the startup the INJ PW (ms) 6.5-7ms and when it smooths out and idles fin its 2.5ms
Watch the videos below and you can see me scrolling through.
http://www.youtube.com/watch?v=EKfD6G55-Gc
http://www.youtube.com/watch?v=rN5muz_K-50
My tuner said it is most likely from me over porting my throttle body. Well thats been replaced and I still have the problem.
So now I move onto my O2s. One toggles and one sits dead at 450mv on my interceptor gauge and 360mv on my Fluke.
Another weird thing is that when I unplug the O2s the interceptor is sill showing 450mv. And I switched the O2s from side to side so it makes me believe that my O2s are fine. Im so confused.
The O2s are fairly new since the old ones were nearly dead.
Here are some vids.
STFT1 when warm idle 1-3
STFT2 when warm idle 1-3
When its running crappy right on the startup the INJ PW (ms) 6.5-7ms and when it smooths out and idles fin its 2.5ms
Watch the videos below and you can see me scrolling through.
http://www.youtube.com/watch?v=EKfD6G55-Gc
http://www.youtube.com/watch?v=rN5muz_K-50
Last edited by NBM-LS1; Apr 23, 2010 at 05:26 PM.
More vids with Solus scanner.
http://www.youtube.com/watch?v=nPVQQSE0y4E
http://www.youtube.com/watch?v=WwJ5qB-9i3w
http://www.youtube.com/watch?v=nPVQQSE0y4E
http://www.youtube.com/watch?v=WwJ5qB-9i3w
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Ok did that and made the car run worse on startup. The idle down and surging will happen at stop lights and occasionally the idle will hang for a few seconds. This is only when the car is warm though.
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Depending on how much time has gone by before re-starting the engine,
the PCM will be in open loop.
The high ECT areas of the open loop fuel table might be set too rich.
IBPW between 6-7ms at start up makes me think this.
Can you log commanded AFR or commanded EQ?
the PCM will be in open loop.
The high ECT areas of the open loop fuel table might be set too rich.
IBPW between 6-7ms at start up makes me think this.
Can you log commanded AFR or commanded EQ?
Well i have no tuning software. I rely on my tuner who is going to be taking a look at it here in a few weeks. Although on my interceptor it shows commanded afr of 14.7. but idk whether to trust it of not since it was showing that one of my o2s were dead when they actually werernt.
Sounds like you might wanna look for a new tuner...
After start enrichment needs work (hence the high IPW then settling down)...
Startup airflow tables probably need work too...
After start enrichment needs work (hence the high IPW then settling down)...
Startup airflow tables probably need work too...
