running/tuning without IAC valve?
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running/tuning without IAC valve? Has anyone run or tuned a car with a cable throttle body without the IAC valve wired? I have a 2004 pcm and switching to cable TB. Do I absolutely have to get a DBC compatible PCM? I'd assume it would just kind of act like a carbed car and idle low when cold instead of adjusting according. Just wondering if anyone else has ever done this?
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Service number is 12576106
I figured it would just act like a carb idling low until it warms up. I'm not exactly a tuner myself, but does HPTUNERS let you advance the idle timing before it reaches temp? I know that's not the exact best way of doing things, but it would keep the idle up.
I figured it would just act like a carb idling low until it warms up. I'm not exactly a tuner myself, but does HPTUNERS let you advance the idle timing before it reaches temp? I know that's not the exact best way of doing things, but it would keep the idle up.
We have run a few race cars with 4150 style TB's without IAC's and they work fine but thats a totally different animal. I would recommend just getting the right pcm, will save alot of headaches IMO. We sell them for $100 with a stock tune in them.
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The hardware # is the 12570558.
So what I'm seeing then is that this is a 2003 PCM but has the blue/green connectors like 2004+. Are the pinouts a 2003 or 2004?
I used this as the pinout reference when modifying my harness
http://www.lt1swap.com/2004vortec_pcm.htm
So what I'm seeing then is that this is a 2003 PCM but has the blue/green connectors like 2004+. Are the pinouts a 2003 or 2004?
I used this as the pinout reference when modifying my harness
http://www.lt1swap.com/2004vortec_pcm.htm
03 - 04 pinouts should be the same. I was going to say it was a 03 PCM but sometimes they can bleed over into the next year. Here is about everything you will need know about converting to DBC.
http://lt1swap.com/cable_conversion.htm
And LSX Power Tuning can help you with setting it up with the proper express van calibration if you don't have that ability.
http://lt1swap.com/cable_conversion.htm
And LSX Power Tuning can help you with setting it up with the proper express van calibration if you don't have that ability.
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Yes sir, I found that page too. That's how I found out it was a 2003 PCM. I have a local tuner here I was going to take it to. I'll see what he has to say for the programming stuff. The motor is a 5.3 with the LSA blower. So I was planning on trailering it to him anyway.
I appreciate all your info. If I do need the express van stuff I'll get back with you
I appreciate all your info. If I do need the express van stuff I'll get back with you
The Express Van is one of the few vehicles that used that PCM and had a DBC TB That's why you need to use as a starting point. Also there are both 2 and 3 bar SD custom operation systems available for it which you will want to use with that blower.
i just completed this swap in my truck pretty straight forward make sure you go into system options and change the dbw setting from 1 to 0 thats all you need to do after its wired