PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

idle drops to 500...

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Old Feb 16, 2006 | 01:42 PM
  #21  
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i let him know what to try out, it is definately ve/idle airflow relate, that cam should beable to idle fine at 800-850 rpm with what i had mentioned to him. i let him know what to change and how much to do it by, without the scanner there really isnt much more we can do so making chagnes in small steps and seeing how it is is about all you can do, unless u want to drive to NC lol
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Old Feb 16, 2006 | 08:28 PM
  #22  
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Originally Posted by WS6FirebirdTA00
i let him know what to try out, it is definately ve/idle airflow relate, that cam should beable to idle fine at 800-850 rpm with what i had mentioned to him. i let him know what to change and how much to do it by, without the scanner there really isnt much more we can do so making chagnes in small steps and seeing how it is is about all you can do, unless u want to drive to NC lol


i tried absolutly everyt hing u said in every way possible and still does the same thing..... .......im so pissed off its not funny i have no idea what the hell is wrong with this car.....
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Old Feb 16, 2006 | 08:38 PM
  #23  
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Originally Posted by Frans96SS
i tried absolutly everyt hing u said in every way possible and still does the same thing..... .......im so pissed off its not funny i have no idea what the hell is wrong with this car.....
You really need a scanner to log the data. This will help pinpoint the problem, otherwise we are just guessing. Did you try to reset the TPS yet and manually adjusting the idle set screw? Based on the code PO506 I would experiment and raise the desired idle speed by 100 rpms and see if the code still sets. If it does set, then it could be the IAC motor pintle valve sticking.
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Old Feb 16, 2006 | 08:41 PM
  #24  
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yeah if you could only scan it it woudl be so easy to fix. find someone with hp up there and ask them to do a cold idle scan for you, ill send you the config to use
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Old Feb 16, 2006 | 09:02 PM
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Picked it up tonight with no solution. Man am I frustrated. Fran did EVERYTHING he could do and still no fix.
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Old Feb 16, 2006 | 09:06 PM
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planning a trip to NC at all? lol will it do it when the car is warm at all or no?
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Old Feb 16, 2006 | 09:07 PM
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and is your TB epoxy filled?
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Old Feb 16, 2006 | 09:15 PM
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Originally Posted by WS6FirebirdTA00
planning a trip to NC at all? lol will it do it when the car is warm at all or no?

No trip to NC planned Yes it does it when warm. After I drive it and come to a complete stop, it dips to 500 and needs gas to get going. Pull into the driveway wait for the garage to go up, it dips, pretty much 90% of the time when I come to a stop or slow it down it dips.
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Old Feb 16, 2006 | 09:18 PM
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ahhhhhhhhh ok i think i have an idea
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Old Feb 16, 2006 | 09:18 PM
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Any chance this could be a leak of some sort? Or is it the IAC because of the consistenancy of when it happens?
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Old Feb 16, 2006 | 09:22 PM
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my car did the same thing, i had to work with the fueling and get it from being so rich and also adjust the throttle cracker airflow
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Old Feb 19, 2006 | 08:14 AM
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Going to a guy who has HPTuners tomorrow, hoping to get this resolved
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Old Feb 19, 2006 | 08:37 AM
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cool mna just let us know how it goes
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Old Feb 20, 2006 | 11:06 AM
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Well saw FOFF667 and he used HPTuners with NO solution. He was stumped, couldn't believe the **** the car was doing. He tried a few diff adjustments and none really worked. I'm about to drive this car into the nearest river. Could this be a manifold leak? Or some kinda vacuum leak and not the tune?
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Old Feb 20, 2006 | 11:31 AM
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here's a copy of the origonal file http://mysite.verizon.net/whenn1/modded1.hpt ...if anyone wants to give me their own .02 feel free...i just adjusted the idle timing, iac park position, commanded idle rpm & raf I spent about an hour on the car and id say 5-6 flashes with nothing resulting with what we were looking for so I ended up throwing the tune back in.
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Old Feb 20, 2006 | 11:36 AM
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Originally Posted by foff667
here's a copy of the origonal file http://mysite.verizon.net/whenn1/modded1.hpt ...if anyone wants to give me their own .02 feel free...i just adjusted the idle timing, iac park position, commanded idle rpm & raf I spent about an hour on the car and id say 5-6 flashes with nothing resulting with what we were looking for so I ended up throwing the tune back in.

Bill I appreciate your help, thanks again.
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Old Feb 20, 2006 | 11:50 AM
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sorry i couldnt help you out better richie...btw thats an hpt file so only owners of hptuners can view it since unfortunatly I cant save it as a standard bin file any longer.
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Old Feb 20, 2006 | 11:59 AM
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Really wondering if it's a leak at this point, the manifold had a crack in the drivers side rear, but nothing that looked like it would cause any problems like this. The crack didn't go all the way through to the center. Is it possible that this is a small leak somewhere and not the tune? Also the IAC valve was swapped out and the the TB was swapped out and the problems still occurred.
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Old Feb 20, 2006 | 12:25 PM
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i only have 2 idea, its either from the throttle cracker table (i zeroed mine out to fix the problem) or o2s are hanging rich on you. i had some weird issues with closed loop enabled, open loop cleared some of it up but not all of it. with the throttle cracker enabled it was giving me a hard time, as soon as i set it to 0 it worked out fine for me and i havent had a single issue going to idle. that is about theonly solution i can think of.

now if the manifold is cracked it could have something to do with it. usually this is something easily tuned out and does not dip that low on stock tables with a cam that size. can you throw your old manifold on there and see how it runs then?
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Old Feb 20, 2006 | 01:03 PM
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I think Bill messed with the throttle cracker, but then again I am not sure...
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