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Old 11-28-2009, 06:24 PM   #1
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Default DIYPNP idle problem

We just got the DIYPNP up and running on our CSP car. Everything seems to me ok but it never idles down after it warms up. We are using the 3.x.x. msextra code and the base tune from diyautotune. I would like to make sure we have the wiring to the IAC correct, where in tunerstudio can I turn the IAC off and on to make sure it's wired correctly.

Thanks, Darryl
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Old 11-28-2009, 07:34 PM   #2
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idel.... lol
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Old 11-28-2009, 07:48 PM   #3
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idel.... lol

Thanks!!! that was very helpful.
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Old 11-28-2009, 07:52 PM   #4
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idel.... lol



Sorry, but I had to laugh.
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Old 11-29-2009, 02:30 AM   #5
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At least for the 99/00 cars the idle target at the DIYPNP map is set really high - maybe that is what you would look at.

Greets
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Old 11-30-2009, 01:19 AM   #6
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Not sure what car you have etc, but in the Megatune, in one of the drop down menus there's a idle option, check to make sure your idle speed is down to 950 (or whatever your target is).

I'd also check to make sure the MS is reading your coolant temp correctly. 160 I think is where it switches over to warm idle.
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Old 12-02-2009, 08:04 PM   #7
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Originally Posted by engled View Post
We just got the DIYPNP up and running on our CSP car. Everything seems to me ok but it never idles down after it warms up. We are using the 3.x.x. msextra code and the base tune from diyautotune. I would like to make sure we have the wiring to the IAC correct, where in tunerstudio can I turn the IAC off and on to make sure it's wired correctly.

Thanks, Darryl
Closed loop or open loop?

Ken
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Old 12-03-2009, 01:45 PM   #8
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1. unplug the iac wires
2. start car with foot on gas
3. keep it running like that until its warm (alternatively just warm the car up beforehand, either way i dont think it matters much)
4. let off throttle
is it idling high like that? if so, adjust the idle screw.
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Old 12-03-2009, 01:55 PM   #9
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Zaphod was correct on the idle map being incorrect. That fixed the problem temporarily. After I fixed the map the car would idle down to ~900 after it got up to temp it was a touch rich but not bad and I thought we had it fixed. But we had been running the car with no alternator because we were still waiting on part to put the board together. As soon as the alternator was enabled the care pulsates during warmup (900 to ~1300rpms) up and down and started running very lean. back to the drawing board... Thanks for the help guys.
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Old 12-03-2009, 05:44 PM   #10
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Most likely you just need to richen it up a bit now.

Ken
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Old 12-04-2009, 03:22 PM   #11
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Originally Posted by muythaibxr View Post
Most likely you just need to richen it up a bit now.

Ken
I added a little fuel to the bottom end and it works fine now. Thanks again.
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