My LS1 is running OK, except that it sometimes dies when I come to a stop!
04-23-2013, 04:41 PM
#1
My LS1 is running OK, except that it sometimes dies when I come to a stop! I just upgraded my PCM to a Camaro 2002 OS, and since I got a GM Hotcam I increased the idle a little, everything running smooth and the car pulls hard and revs to 6000 in a blink of an eye, except for one thing, sometimes when I come to a stop it dies when I depress the clutch, I tryed playing with the different idle settings with no luck, can anyone please have a look at my files and give me any hent as where the problem may be?
Thanks in advance!
Thanks in advance!
04-27-2013, 05:28 PM
#4
IAC Relearn Procedure
If you are having idle issues you may need to reset your Idle Air Control (IAC) and TPS, do this before you start drilling holes in your throttle body (TB) blade. I have used this procedure on some huge cammed cars and it worked.
1) Monitor your IAC, Idle Speed, throttle position voltage and your throttle position %.
2) With the key in the ON position, adjust your TB set screw until your throttle position is 2%.
3) Turn your key to the OFF position.
4) Unplug your Throttle Position Sensor (TPS) and IAC.
5) Turn your key to the ON position for a few seconds, and then OFF again.
6) Plug in the TPS and IAC and then turn your key to the ON position and restart logging. Your throttle position will now be reset to 0 degrees and about .45-.55 volts.
7) Start your engine, your IAC should be 40-60 for a cammed engine.
If you are not at your desired IAC position, redo the above procedures in smaller increments.
but I still could not bring the IAC counts down to what you mentioned, its at about 120-125 while idle. is there a chance that I have a faulty IAC valve? If you are having idle issues you may need to reset your Idle Air Control (IAC) and TPS, do this before you start drilling holes in your throttle body (TB) blade. I have used this procedure on some huge cammed cars and it worked.
1) Monitor your IAC, Idle Speed, throttle position voltage and your throttle position %.
2) With the key in the ON position, adjust your TB set screw until your throttle position is 2%.
3) Turn your key to the OFF position.
4) Unplug your Throttle Position Sensor (TPS) and IAC.
5) Turn your key to the ON position for a few seconds, and then OFF again.
6) Plug in the TPS and IAC and then turn your key to the ON position and restart logging. Your throttle position will now be reset to 0 degrees and about .45-.55 volts.
7) Start your engine, your IAC should be 40-60 for a cammed engine.
If you are not at your desired IAC position, redo the above procedures in smaller increments.
04-27-2013, 05:29 PM
#5
04-29-2013, 09:52 AM
#6
TECH Addict
You have to adjust you throttle blade with the set screw to get the proper counts then reset each time you make a change.If i remember right you will have to open blade to lower counts. Make sure car is up to operating temp when checking counts.
05-01-2013, 12:20 AM
#7
BTW, how do you usually set that screw? the only way I see is to remove the TB from the intake to get access to that bolt.
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05-01-2013, 10:57 AM
#10
TECH Addict
I know people on the camaro take set screw all the way out and put it in from the top so they can adjust set screw on the car.I have a 5.3 in a 1992 chevy truck so i can just adjust screw with 1/4 rachet with 1/4 in socket with tork bit taped to socket so it will not fall out.
05-02-2013, 12:01 AM
#11
I opened the TB blade another 3% (a total of 5% from stock) and the IAT is down to 35 now, the car now is running MUCH better, I drove it for 30 min. yesterday and it never died on me, sometimes the rpm will drop to around 700 rpm or so (my idle is right on 850 rpm) but it did not die, so now I think the problem is completely solved.
Thank you guys for your positive inputs!
Thank you guys for your positive inputs!
