Car Idles at 2500-3000 RPMS HELP!
01-26-2008, 06:49 PM
#41
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That's good news. Mine has been under the car cover as I worked on my father in law's Dodge Cummings. I think he came to visit to save $1,500 on a fue pump R&R.
I drove the SS briefly today and it's still F'd up. I'm going to switch back to the OEM PCM again and see if it's at least drivable. The w4me PCM drives OK until you turn on the AC and then it's 3,000RPM autopilot with the IAC count of 310.
Must be that pesky mysterious vacuum leak again that only occurs when the AC is on.
I can't wait to get in to the tuning so I can figure things out. I also want to take a trip over the mountain down to sea level to see how it runs in thick air. I'm at 5,000ft with an ambient barometric reading of around 25.5ish. I'm curious how my injectors will hold up though as I"m already exceeding 92% at altitude. The calculators I've played with come up with about an 17% power increase.
EFI Live is pretty cool though as I can see the engine parameters driving the idle issues. The IAC counts going from the 90's to over 300.
I drove the SS briefly today and it's still F'd up. I'm going to switch back to the OEM PCM again and see if it's at least drivable. The w4me PCM drives OK until you turn on the AC and then it's 3,000RPM autopilot with the IAC count of 310.
Must be that pesky mysterious vacuum leak again that only occurs when the AC is on.
I can't wait to get in to the tuning so I can figure things out. I also want to take a trip over the mountain down to sea level to see how it runs in thick air. I'm at 5,000ft with an ambient barometric reading of around 25.5ish. I'm curious how my injectors will hold up though as I"m already exceeding 92% at altitude. The calculators I've played with come up with about an 17% power increase.
EFI Live is pretty cool though as I can see the engine parameters driving the idle issues. The IAC counts going from the 90's to over 300.
01-26-2008, 07:32 PM
#43
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Well I put the Predator tuned PCM in and the problem is gone. I think it runs much better overall with the Predator tune.
Last edited by ssheets; 01-26-2008 at 07:55 PM.
01-26-2008, 08:28 PM
#44
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Actually with a storm coming today I was at 25.1 in hg.
Here's a good calculator for altitude losses.
http://wahiduddin.net/calc/calc_hp_abs.htm
I'm at 87.2% HP with current conditions.
Here's a good calculator for altitude losses.
http://wahiduddin.net/calc/calc_hp_abs.htm
I'm at 87.2% HP with current conditions.
