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Truck is running

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Old Jun 13, 2006 | 09:59 PM
  #1  
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Default Truck is running

Still on stands, though. Allen showed me how to delete the alternator codes (2002 PCM), EGR codes, turn the EGR off (I had to remove it for clearance), and zero the EGR advance table.
I've been running it to set up the Spal fan controller. It would have been easier to use the Nelson Performance fan harness. I thought the Spal controller would be easier because they are Spal fans, but there is about the same amount of wire piggybacking on either setup. They are nice and quiet, and appear to move enough air.
It took awhile to learn how to idle, this is the first PCM that I've installed that didn't idle right away. And it's the last PCM that I'll install, now that I have HP Tuners.
There is one concern about the way it runs. When I raise the rpm, to maybe 2000, and let off the gas, the rpm drops below idle speed to zero. It dies. When I raise the rpm to about 1200 and let off, it drops below idle, but catches itself and stays running.
Does anybody know if this is a tuning issue, or could it be because my gas is so old? Or is there foundation to my fear that the MAF needs to be relocated to the engine side of the I/C? Or should I just shut up and get it ready and drive it?
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Old Jun 14, 2006 | 05:29 AM
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Dammit, just get that thing on the road will ya? Sounds like a tuning issue to me, what happens when you punch it to say 4000rpm or higher, will it cut off or catch itself?
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Old Jun 14, 2006 | 09:26 AM
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It almost sounds like the IAC is sticking or an air leak around the manifold. Same thing happened to me when the tube for the EGR to the manifold broke ( inside the heat wrap so I could not see it ). Did exactly what you described.
Spray some starter fluid around the hoses and manifold, if the RPM's jump up you found your problem area.

Last edited by ktmrider; Jun 14, 2006 at 01:51 PM.
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Old Jun 14, 2006 | 01:46 PM
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IAT is sticking?
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Old Jun 14, 2006 | 01:50 PM
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Ooops, meant IAC ( idle air controller/solenoid ). Sorry for the confusion, I'll edit the other post.
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Old Jun 14, 2006 | 02:03 PM
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Are you running a bigger cam?
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Old Jun 14, 2006 | 02:53 PM
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That same thing happened to me and it was a maf failure. Just got a new one and problem solved. See if one of your buddies will let you put theres on and try it. Thats what i did rather than buying one. Its worth a shot before you drive yourself nuts tuning.
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Old Jun 14, 2006 | 08:09 PM
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Thanks, responders. Problem disappeared as soon as I started driving it.
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Old Jun 14, 2006 | 08:27 PM
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Originally Posted by Linda
Dammit, just get that thing on the road will ya?
So it seems my advice proved to be useful on this one...LOL. How does it feel?
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Old Jun 15, 2006 | 09:26 AM
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Cool

Nice to hear that you have it back on the road. I hope that everything is going well.
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